201236816 六、發明說明： 【發明所屬之技術領域】 本發明係與使用於以金屬製品之防鏽防鈾爲目的而實 施塗裝等之除去及噴塗時之材料調製噴砂處理的噴砂材及 噴砂方法相關。 【先前技術】 在以壓縮空氣等噴射砂粒等之硏削材來剝除塗裝皮膜 之噴砂方法，通常，係實施利用乾燥狀態之硏削材的乾式 噴砂處理。乾式噴砂處理時，因爲硏削材衝擊被處理物而 破碎，因而發生粉塵，或者，發生從被處理物表面.被剝除 之塗裝皮膜及基材之氧化物之鏽等粉塵。尤其是，在重新 粉刷街道及河川上之橋樑等的劣化塗裝時等，粉塵對策需 要龐大的費用。 所以，該乾式噴砂處理時，必須採取防止作業中之粉 塵之發生及飛散的各種措施。乾式噴砂時，粉塵飛散於廣 泛範圍而難以在開放空間實施噴砂作業，例如，專利文獻 1即記載著一種噴砂裝置，也可配合需要，對硏削材之噴 射噴嘴部附加水等之噴霧機能來進行濕式噴砂。 此外，非專利文獻1，則記載著以水壓壓縮充塡於貯 存槽內之硏削材，在粒子間只有水之狀態下，以擠牙膏式 進行擠出，並使其承載於噴砂空氣之方式來進行濕粒噴砂 。於該方式，濕潤之粒子衝擊加工物之瞬間，放出降落傘 狀之水膜來抑制粉塵之發生。 -5- 201236816 [專利文獻1]日本特許第2 8 80498號公報 [非專利文獻1]"濕粒噴砂"，[online]SNM AZIA股份 有限公司，[2010年1 1同22曰檢索]，網際網路 <URL:http://snmasia.jp/blaster/blasterO 1 .html> 【發明內容】 如專利文獻1之記載所示，吹附乾燥硏削材，從其周 圍以水之噴霧膜來抑制粉塵之方式時，因爲以防止硏削材 等飛散之水來進行粉塵捕集，爲了減少粉塵的發生，需要 較多之水噴霧量。此外，因爲發生大量廢水，而發生處理 後之水處理的問題。 此外，專利文獻1之噴砂裝置時，係由：貯存乾式之 硏削材的貯存槽；裝載著切取一定量之硏削材之部分的本 體裝置部分；貯存以進行水之噴霧爲目的之水的貯存槽； 以加壓送出水之水泵部分；以及軟管類及用以執行吹附之 噴嘴部分；所構成，裝置全體的規模很大。此外，於該例 ，噴砂噴嘴部採用混入水之方法，然而，也有具有在硏削 材及空氣之混合搬送中混合水之部分的裝置。然而，該等 裝置，相對於水及硏削材之體積，需要龐大的空氣量，實 際上，因爲水滴及硏削材只是雜亂地混入空氣中，硏削材 之粒無法每一粒都獲得充份的濕潤。而且，專利文獻1之 噴砂裝置時，在實施現場施工等時，難以將大規模裝置全 體設置工程用之作業場所上，而必須將裝置設置於處理對 象物之附近的作業場所下方（地面等）來使用。所以，用 -6 - 201236816 以連結實施吹附之噴嘴與貯存槽的軟管長度較長，導致處 理能力的降低’或者’必要之壓縮空氣供給源的空氣壓縮 機需要更強力的大型裝置。 此外，非專利文獻1所記載之濕粒噴砂時，因爲只是 以水壓擠出來濕潤硏削材，不可能進行水份量的管理，因 爲水份量不均一，實際上，會呈現過度噴射水份之傾向。 尤其是，全新開始噴砂時，有必須先將乾燥硏削材充塡至 貯存槽內並施加水壓，至水份到達硏削材之粒子間爲止， 無行開始作業的問題。 所以，本發明之目的，係在提供一種噴砂材及噴砂方 法，噴砂處理中所發生之除去塗裝皮膜、及硏削材之粉塵 較少，無需大規模之噴砂裝置，且無需噴砂處理後之水處 理。 本發明之噴砂材，係含有相對於硏削材爲5〜3 0質量 %之水份，而爲使全部硏削材粒子均等濕潤之事先調製的 噴砂材。本發明之噴砂材，與乾式噴砂相同，係充塡於噴 砂裝置之噴砂材貯存槽，而以壓縮空氣被朝被處理物噴射 ，利用噴砂材所保有之水份來捕集粉塵，而可防止粉塵之 發生。此外，依據本發明之噴砂材，因爲只含有防止粉塵 飛散之必要量的水份，於噴砂處理中及處理後，不會發生 過多的廢水。而且，本發明之噴砂材，因爲可以在完成水 份調製之狀態下以小包裝等來提供，無需傳統之用以貯存 水的水槽。 此外，含有相對於硏削材爲5質量％以下之水份時， 201236816 可能因爲水份不足而無法充份防止粉塵的發生。另一方面 ，含有相對於硏削材爲超過30質量％之水份時，水份從硏 削材分離，而於噴砂處理中及處理後發生過剩的廢水。 並且，本發明之噴砂材，以含有界面活性劑爲佳。本 發明之噴砂材，因爲含有水份，從噴砂材貯存槽被送出時 ，噴砂材彼此容易結塊而使流動性變差。所以，以使本發 明之噴砂材含有界面活性劑來改善流動性，可以安定地進 行送出。 此外，本發明之噴砂材，以含有保濕劑爲佳。在以塗 裝除去爲目的時，硏削材之粒子較小（粒子直徑〇. 1〜 0.15 mm)者較具效果，此時，硏削材可保有之水份量較多 (最大爲20質量％程度），然而，塗裝除去時，以水份量 15〜30質量％爲佳，同時應含有保濕劑。噴塗之材料調製 等時，以粒子較大（粒子直徑0.6〜0.85mm)者爲佳，此 時，硏削材可保有之水份量較少（最大爲1 5質量％程度） ，然而，噴塗之材料調製時，以水份量5〜20質量％爲佳 ，同時應含有保濕劑。本發明之噴砂材，藉由含有保濕劑 ，可以增加硏削材可保有之水份量，而可使硏削材均等地 保有水份。 此外，本發明之噴砂材，以含有防鏽劑爲佳。本發明 之噴砂材，藉由含有防鏽劑，可以延長噴砂處理後所實施 之噴塗及塗裝的施工間隔。 (1 )依據含有相對於硏削材爲5〜3 0質量％之水份而 使全部硏削材粒子均等濕潤之事先調製的噴砂材，可以與 -8- 201236816 乾式噴砂相同之方式對被處理物進行噴射，藉由噴砂材所 保有之水份來捕集粉塵，而防止粉塵之發生。此外，因爲 噴砂處理中及處理後’不會發生過剩廢水，故無需處理後 之硏削材處理以外的水處理。並且，以小包裝等來提供， 無需傳統之用以貯存水的水槽，進而可謀求噴砂裝置全體 之小型化，而可將噴砂裝置全體設置於現場施工等之作業 場所上。此外，用以連結執行吹附之噴嘴及噴砂材貯存槽 的軟管只要最短的長度即可，可以減少處理能力的降低， 並可運用小型的空氣壓縮機。 (2 )以含有界面活性劑來改善流動性，而可從噴砂 材貯存槽安定地送出噴砂材。 (3 )以含有保濕劑來增加硏削材可保有之水份量， 而可使硏削材均等地保有水份。 (4 )以含有防鏽劑，可延長噴砂處理後所實施之噴 塗及塗裝的施工間隔。例如，使用於噴塗之材料調製噴砂 處理時，雖然JIS H8 3 00有從噴砂處理至噴塗施工爲止應 在4小時以內實施的規定，然而，以含有防鏽劑，可以抑 制在1〜2日後實施噴塗施工時之噴塗皮膜之密貼力的降 低，而提高作業性。 【實施方式】 第1圖，係使用本發明之實施方式之噴砂材的噴砂裝 置之槪略構成圖。第1圖中，作爲本發明之實施方式之噴 砂裝置的噴砂裝置，係具備：用以貯存作爲噴砂材之噴砂 -9- 201236816 材1的噴砂材貯存槽2;用以對被處理物X實施噴砂材1 之吹附的噴砂噴嘴3 ;以及用以連結噴砂材貯存槽2及噴 砂噴嘴3之噴砂軟管4。此外，於該噴砂裝置，尙另外連 結著用以供給壓縮空氣之空氣壓縮機5。 於噴砂材貯存槽2之下方，設有：用以執行噴砂材1 之排出的排出部2a;及用以混合噴砂材1及壓縮空氣並傳 送至噴砂軟管4的混合部2b。混合部2b及空氣壓縮機5 ，係由空氣軟管6a進行連結。此外，空氣壓縮機5及噴 砂材貯存槽2之上部，係由空氣軟管6b進行連結。 本發明之實施方式的噴砂材貯存槽2，係以壓縮空氣 進行加壓來送出噴砂材1之加壓型，然而，也可以爲無加 壓之開放型。此外，本實施方式之噴砂材1，相較於傳統 之乾式硏削材，通常，流動性較差，故排出部2a係由定 量輸送台、螺旋輸送機、或旋轉閥輸送機等之各種定量排 出裝置所構成，而以定量對混合部2b進行供給排出》 空氣壓縮機5，係使用電動式或引擎式等。空氣壓縮 機5所發生之壓縮空氣中之油份及水份等，介由未圖示之 排流除去裝置，由空氣軟管6a、6b供應給噴砂材貯存槽2 及混合部2b。此外，雖然並未圖示，然而，具備以執行該 噴砂裝置之起動及停止爲目的之操作開關及閥類等。 該噴砂裝置所使用之噴砂材1，含有相對於硏削材爲 5〜3 0質量％之水份，係以全部硏削材粒子均等濕潤之方 式所事先調製者。硏削材，可以使用噴砂處理用非金屬系 硏削材之全部種類，例如，氧化鋁、石榴石、矽砂、玻璃 -10- 201236816 珠、碳化矽、及熔渣等。硏削材及水份，係事先混合調製 ，例如，並分裝成1袋10〜25kg之小包裝等。此外，水 份以外，也可含有市販之防鏽劑、界面活性劑、或保濕劑 等。 防鏽劑，例如，可以使用市販品之胺系防鏽劑等。界 面活性劑，例如，可以使用市販品之萘亞磺酸甲醛系化合 物、烷基苯磺酸鈉、聚氧乙烯烷基醚、及聚氧乙烯脂肪酸 甲酯等。保濕劑，例如，可以使用市販品之聚丙烯酸鈉系 等。 水份，係對應硏削材之種類及粒度等，而調整於5〜 3 0質量％之範圍。例如，硏削材爲氧化鋁，粒子直徑爲 0.1〜0.15mm之粒度時，準備水份量爲5質量％之袋、10 質量°/。之袋.....30質量％之袋等，某程度之水份量不同 之種類的包裝袋。並且，裝噴砂材1的包裝袋，利用不會 因爲蒸發等而導致水份量變化之保管袋。 此外，含有界面活性劑時，相對於噴砂材1所含有之 水份，例如，含有〇. 1〜5質量％之界面活性劑。氧化鋁粒 子、直徑爲0.1〜0.15mm之硏削材等時，因爲從噴砂材貯 存槽2傳送至排出部2a、及從排出部2a傳送至混合部2b 時，噴砂材1彼此容易結塊，流動性較差，可以藉由含有 界面活性劑來改善流動性。藉此，可以從噴砂材貯存槽2 安定地送出噴砂材1。 此外，於噴砂材1，以含有保濕劑爲佳。硏削材之粒 子直徑爲0.1〜0.15mm時，硏削材可保有之水份量爲20 -11 - 201236816 質量％程度，粒子直徑爲0.6〜0.85mm時，爲15質量％程 度，硏削材無法保有超過上述之水份而分離。所以，含有 保濕劑的話，可以增加硏削材可保有之水份量，並可使硏 削材可均等地保有水份。 此外，硏削材除了水份以外，尙包含有防鏽劑、界面 活性劑、及保濕劑等時，防鏽劑、界面活性劑、保濕劑等 、及水份之全體量，以相對於硏削材爲5〜30質量％爲佳 。藉此，即使含有防鏽劑、界面活性劑、保濕劑等時，噴 砂材全體中之硏削材的比例不會改變，而可維持目標之噴 砂性能。 在上述構成之噴砂裝置，將事先調製之必要分量的噴 砂材1置入噴砂材貯存槽2。起動噴砂裝置的話，從空氣 壓縮機5對噴砂材貯存槽2及混合部2b進行壓縮空氣之 供給，並介由噴砂軟管4從噴砂噴嘴3進行噴射。噴砂材 1，由排出部2a進行定量排出，而傳送至混合部2b。並且 ，噴砂材1，在混合部2b，一邊被壓縮空氣進行粉碎，一 邊藉由該壓縮空氣之噴射來通過噴砂軟管4內部，再從噴 砂噴嘴3之噴射口 3 a進行噴射。 噴砂材1，衝擊被處理物X之表面，並剝離塗裝皮膜 、鏽、髒污等之附著物Y後，飛散並堆積於被處理物X 之周邊。本實施方式之噴砂材1，因爲硏削材粒子之表面 皆爲水份之皮膜所覆蓋，從噴砂噴嘴3噴射並衝擊於被處 理物X之表面時，硏削材所保有之水份先被吹附於附著物 Y之表面，其後，才會藉由硏削材粒子而發生附著物Y的 -12- 201236816 粉碎及剝離。所以，可以有效率地濕潤附著物γ粉碎及剝 離時所發生之附著物的粉塵，而抑制粉塵之發生。 此外，本發明之實施方式的噴砂材1時，可以配合必 要，任意選擇5〜3 0質量％之不同水份量之噴砂材1的小 包裝來使用，故可配合被處理物X之狀態來抑制粉塵之發 生。此外，本實施方式之噴砂材1時，即使在噴射量不安 定而變動時，不會只噴射水，相對於被噴射之噴砂材1， 水份量爲一定，故可抑制過度水份之飛散、及水份不足而 發生過大的粉塵。 以上所示，依據本發明之實施方式之噴砂材1，可以 與乾式噴砂相同的方式對被處理物X進行噴射，並以噴砂 材1所保有之水份來捕集粉塵，進而防止粉塵的發生。此 外，噴砂處理中及處理後，不會發生過剩廢水，不需要處 理後之硏削材處理以外的水處理。 此處，參照第2圖，針對本發明之實施方式之噴砂裝 置及傳統噴砂裝置之差異進行說明。第2圖，係本發明之 實施方式之噴砂裝置（該圖之（a ))及傳統噴砂裝置（ 該圖之（b)的比較說明圖。 第2 ( a )圖所示，本發明之實施,方式的噴砂裝置時， 係將噴砂材貯存槽2設置於作業場所上，與設置於地上之 空氣壓縮機5則以空氣軟管6進行連結，相對於此，如第 2 ( b )圖所示，傳統之噴砂裝置時，係將由噴砂材貯存槽 1 0、水槽1 1 a、及水泵1 1 b所構成之水供給裝置1 1及空氣 壓縮機1 2設置於地上，從地上至作業場所上之噴砂噴嘴 -13- 201236816 13爲止’以噴砂軟管14及水軟管15進行連結β 如第2圖所示，本發明之實施方式之噴砂裝置時，相 對於硏削材，含有5〜30質量％之水份，全部硏削材粒子 均等濕潤，而以小包裝袋1 a等提供事先調製之噴砂材1， 而無需傳統噴砂裝置所具備之水槽11a、水泵lib、及水 軟管1 5等，可以謀求噴砂裝置全體之小型化，並可將該 噴砂裝置全體設置於現場施工等之作業場所上。 所以，用以連結進行吹附之噴砂噴嘴3及噴砂材貯存 槽2的噴砂軟管4只要最短的長度即可，可以減輕處理能 力的降低，且可運用小型之空氣壓縮機5。另一方面，傳 統之噴砂裝置時，因爲由水槽1 1 a及水泵1 1 b供給水份， 而較爲大型，無法設置於作業場所上，而必須以從地上至 作業場所上以較長的水軟管1 5來進行供給，噴砂軟管4 當然也較長。 [實施例] 以使用上述實施方式之噴砂材1的噴砂裝置來進行噴 砂試驗。試驗，如第3 ( a )圖所示’係以1邊爲1 m之正 方形的鋼板7來實施。鋼板7’係厚3.2 mm之黑皮鋼板（ SS400)。該鋼板7，如第3(b)圖所示，係垂直地裝設 於支持台（未圖示），以噴砂噴嘴3朝鋼板7之中央之噴 射角度爲直角，且鋼板7與噴砂噴嘴3前端之距離爲 2 00mm之固定狀態下，使噴砂材1通過噴砂軟管4從噴砂 噴嘴3之前端吹附於鋼板7。 -14- 201236816 該狀態，係使噴砂材1衝擊鋼板7表面來除去鋼板7 表面之氧化皮膜（黑皮）的狀態，通常之乾式噴砂時，係 會發生粉塵的狀態。此時，觀察投射各種噴砂材1時之粉 麈的發生狀態、及附著於表面之水份的擴散形態，來確認 噴砂材1之效果。此外，噴砂材1之量，相對於硏削材 1 k g來設定各種水份量。此外，配合水份量，適時地添加 作爲界面活性劑之烷基苯磺酸鈉、及作爲保濕劑之聚丙烯 酸鈉。 進行該噴砂材1 (硏削材1 kg +水份）之大約1分鐘的 投射，觀察評估鋼板7表面之狀態觀察評估。評估之基準 ’係依據表1所示之評估基準表來實施。試驗結果’如表 2〜表6所示。 -15- 201236816 [表i] 狀況 詳細狀態 槪念圖 判定 濕潤 發生粉塵 1 未濕潤 乾燥 粉塵過大 〇 不適合 2 濕潤 只有中心乾燥 無水滴垂滴 粉塵少 0 適合 3 濕潤 無水滴垂滴 粉塵少 齋 適合 4 濕潤 水滴垂滴少 粉塵少 f 適合 5 濕潤 水滴垂滴過大 粉塵少 1 不適合 -16 - 201236816 [表2] 試驗條件 結果 硏削材材質 粒度 (粒徑mm) 水份量 (質量％) 備註 狀況 判定 1% 添加界面活性劑 1 不適合 3% 添加界面活性劑 1 不適合 5% 添加界面活性劑 2 適合 10% 添加界面活性劑 2 適合 15% 添加界面活性劑 3 適合 20% 添加界面活性劑 添加保濕劑 3 適合 氧化鋁系 0.15 〜0_1 25% 添加界面活性劑 添加保濕劑 3 適合 30% 添加界面活性劑 添加保濕劑 4 適合 35% 添加界面活性劑 添加保濕劑 5 不適合 40% 添加界面活性劑 添加保濕劑 5 不適合 -17- 201236816 [表3] 試驗條件 結果 硏削材材質 粒度 (粒徑mm) 水份量 (質量°/。） 備註 狀況 判定 1% 添加界面活性劑 1 不適合 3% 添加界面活性劑 1 不適合 5% 添加界面活性劑 2 適合 10% 添加界面活性劑 2 適合 15% 添加界面活性劑 3 適合 20% 添加界面活性劑 添加保濕劑 4 適合 氧化鋁系 0.3-0.22 25% 添加界面活性劑 添加保濕劑 4 適合 30% 添加界面活性劑 添加保濕劑 4 適合 35% 添加界面活性劑 添加保濕劑 5 不適合 40% 添加界面活性劑 添加保濕劑 5 不適合 -18- 201236816 [表4] 試驗條件 結果 硏削材材質 粒度 (粒徑mm) 水份量 (質量％) 備註 狀況 判定 氧化鋁系 0.85 〜0.6 1% 添加界面活性劑 1 不適合 3% 添加界面活性劑 1 不適合 5% 添加界面活性劑 2 適合 10% 添加界面活性劑 3 適合 15% 添加界面活性劑 添加保濕劑 3 適合 20% 添加界面活性劑 添加保濕劑 4 適合 25% 添加界面活性劑 添加保濕劑 4 適合 30% 添加界面活性劑 添加保濕劑 4 適合 35% 添加界面活性劑 添加保濕劑 5 不適合 40% 添加界面活性劑 添加保濕劑 5 不適合 201236816 [表5] 試驗條件 結果 硏削材材質 企丄pin 松度 (粒徑mm) 水份量 (質量％) 備註 狀況 判定 石榴石系 0.6 〜0.25 1% 添加界面活性劑 1 不適合 3% 添加界面活性劑 1 不適合 5% 添加界面活性劑 2 適合 10% 添加界面活性劑 3 適合 15% 添加界面活性劑 3 適合 20% 添加界面活性劑 添加保濕劑 3 適合 25% 添加界面活性劑 添加保濕劑 3 適合 30% 添加界面活性劑 添加保濕劑 4 適合 35% 添加界面活性劑 添加保濕劑 5 不適合 40% 添加界面活性劑 添加保濕劑 5 不適合 -20- 201236816 [表6] 試驗條件 結果 硏削材材質 粒度 (粒徑mm) 水份量 (質量％) 備註 狀況 判定 熔渣系(新生變晶(neobrast)) 0.8 〜0.3 1% 添加界面活性劑 1 不適合 3% 添加界面活性劑 1 不適合 5% 添加界面活性劑 2 適合 10% 添加界面活性劑 3 適合 15% 添加界面活性劑 4 適合 20% 添加界面活性劑 添加保濕劑 4 適合 25% 添加界面活性劑 添加保濕劑 4 適合 30% 添加界面活性劑 添加保濕劑 4 適合 35% 添加界面活性劑 添加保濕劑 5 不適合 40% 添加界面活性劑 添加保濕劑 5 不適合 結果，可以得知，水份量爲5%以下時，粉塵之發生 較多，水份的粉塵抑制效果較少。此外，可以得知，水份 量超過30%時，粉塵之發生減少，然而，噴砂處理後，水 份從硏削材分離而發生過剩水份之垂滴，除了硏削材之處 理以外，必須進行過剩水之處理。依據上述，相對於硏削 材，含有5〜3 0%之水份，使全部硏削材粒子均等濕潤之 事先調製的噴砂材1時，確認可以抑制粉塵之發生，且無 需處理後之過剩水的處理。 此外，爲了確認防鏽劑之效果，以本實施例之噴砂方 法及傳統之乾式噴砂方法，形成噴塗皮膜，測定噴塗皮膜 -21 - 201236816 之附著力，來確認防鏽劑之效果。試驗片，係以 之硏削材對SS4 00之鋼板實施噴砂處理，本實拥 方法時，於噴砂處理後之2日後形成噴塗皮膜》 式噴砂方法時，則於噴砂處理後之2小時（JIS 4小時以內）後形成噴塗皮膜。測定皮膜之附 JIS H8300(2005年）之附錄書A所記載之「/ 密貼強試驗（A法）」的方法來實施。試驗條件 果如表7所示。 相同粒度 例之噴砂 傳統之乾 H8300 爲 著力，以 .2.2拉伸 及試驗結 -22- 201236816 [表7] 試驗條件 噴砂方法 硏削材 硏削材之 粒子徑 噴塗裝置 噴塗材料 試驗結果 附著力(MPa) 測定値 平均 本實施例之 噴砂方法 氧化鋁+ 含有防鏽 劑之水份 15質量％ 0.1 〜0.85 (mm) 電漿 噴塗裝置 AL5%^jg (皮膜厚度 150μ m) 7.6 7.4 8.2 8.3 7.9 8.2 7.93 傳統之乾式 噴砂方法 氧化鋁 0.1 〜0.85 (mm) 電漿 噴塗裝置 AL5%Mg (皮膜厚度 150μηι) 7.4 7.8 7.93 8.1 7.9 本實施例之 噴砂方法 氧化鋁+ 含有防鏽 劑之水份 15質量％ 0.1 〜0.85 (mm) 氣談 噴塗裝置 AL5%Mg (皮膜厚度 150μιη) 5.62 6.24 5.58 6.16 6.35 7.01 6.33 傳統之乾式 噴砂方法 氧化鋁 0.1~0.85 (mm) 氣談 噴塗裝置 AL5%Mg (皮膜厚度 150μιη) 5.87 5.96 6.53 5.76 6.09 其他條件 防鏽劑之量：7_W分量中含有0.5質量％之防鏽劑 本實施例之硏削材的水份量：相對於硏削材，1.5質量％之水份(含上述防鏽劑) 本實施例，於噴砂處理後之2曰(48小時)後，形成噴射皮膜 傳統之乾式噴砂，於噴砂處理後之2小時後，形成噴射皮膜 各噴塗裝置之運轉條件，係採用具代表性之標準條件。 試驗片材質：SS400之鋼板尺寸：厚度6mmxl50mmx300nim 附著力測定部位數：對試驗片之中央部的5個部位進行測室__ -23- 201236816 結果，確認到，於噴塗之材料調製噴砂處 施例之噴砂材1時，不受從噴砂處理至噴塗施 小間以內實施的限制，於2日後實施噴塗施工 噴塗皮膜之密貼力降低的情形。 本發明之噴砂材及噴砂方法，對於以金屬 防蝕爲目的所實施之劣化塗裝的除去及噴塗時 料調製作業中所發生之粉塵及飛散的噴砂處理 用。尤其是，在重新粉刷街道及河川上之橋樑 裝時等，粉塵對策需要龐大的費用，相對於此 明可以大幅減少粉塵本身的發生，在大幅縮減 噴塗施工之費用上，極爲.有利。 【圖式簡單說明】 第1圖係使用本發明之實施方式的噴砂材 的槪略構成圖。 第2圖係本發明之實施方式的噴砂裝置與 置的比較說明圖。 第3圖係噴砂試驗條件說明圖。 【主要元件符號說明】 1 :噴砂材 2 :噴砂材貯存槽 3 :噴砂噴嘴 4 :噴砂軟管 理使用本實 工爲止在4 時，未發生 製品之防鏽 ，在防止材 上，十分有 等的劣化塗 ，因爲本發 重新塗裝及 之噴砂裝置 傳統噴砂裝 -24- 201236816 5 :空氣壓縮機 6、6a、6b :空氣軟管 -25201236816 VI. Description of the Invention: [Technical Field] The present invention relates to a blasting material and a sand blasting method for material blasting treatment for removing and spraying a coating for the purpose of rust-proof and uranium prevention of metal products. Related. [Prior Art] A blasting method in which a coating film is peeled off by a blasting material such as a compressed air or the like is used, and usually, a dry blasting treatment using a squeegee in a dry state is carried out. In the dry blasting treatment, dust is generated because the boring material is broken by the object to be treated, or dust is generated from the coating film peeled off from the surface of the object to be treated and the rust of the oxide of the substrate. In particular, the dust countermeasures require a large cost when repainting the streets and the bridges on the rivers, etc. Therefore, in the dry blasting treatment, various measures must be taken to prevent the occurrence and scattering of dust during operation. In the case of the dry blasting, the dust is scattered in a wide range, and it is difficult to perform the blasting operation in the open space. For example, Patent Document 1 describes a blasting apparatus, and a spray function of water or the like may be added to the injection nozzle portion of the boring material. Perform wet blasting. Further, Non-Patent Document 1 discloses that a boring material that is filled in a storage tank by water pressure compression is extruded in a toothpaste type with water in between particles, and is carried by a blasting air. Way to carry out wet blasting. In this manner, when the wet particles impact the processed material, a parachute-shaped water film is released to suppress the occurrence of dust. -5-201236816 [Patent Document 1] Japanese Patent No. 2 8 80498 [Non-Patent Document 1] "Wet Grain Blasting", [online] SNM AZIA Co., Ltd., [2010 1 1 and 22曰 Search] [Internet] <URL: http://snmasia.jp/blaster/blasterO1.html> [Summary of the Invention] As shown in Patent Document 1, a dry squeegee is blown, and a water spray is sprayed around it. When the film is used to suppress dust, it is necessary to prevent dust from being collected by scattering water such as boring material, and a large amount of water spray is required in order to reduce the occurrence of dust. In addition, since a large amount of waste water occurs, the problem of water treatment after the treatment occurs. Further, the blasting apparatus of Patent Document 1 is a storage tank for storing a dry boring material; a portion of the main body device carrying a portion for cutting a certain amount of boring material; and a water for storing water for spraying. The storage tank; the portion of the water pump that delivers water by pressure; and the hose type and the nozzle portion for performing the blowing; the entire apparatus is large in scale. Further, in this example, the blasting nozzle portion is a method in which water is mixed, but there is also a device having a portion for mixing water in the mixed conveyance of the boring material and the air. However, these devices require a large amount of air relative to the volume of water and boring material. In fact, since water droplets and slabs are only mixed into the air in a disorderly manner, the granules of the slab can not be charged for each grain. Moisture. Further, in the sand blasting apparatus of the patent document 1, when performing on-site construction or the like, it is difficult to install the entire large-scale apparatus in the work place for the work, and it is necessary to install the apparatus under the work place near the object to be processed (ground, etc.). To use. Therefore, the use of -6 - 201236816 to link the hoses of the blow nozzles and storage tanks to a longer length results in a lower processing capacity' or the air compressor of the necessary compressed air supply source requires a more powerful large device. Further, in the wet blasting described in Non-Patent Document 1, since the mash material is wetted by only water pressure extrusion, it is impossible to manage the amount of moisture, because the amount of water is not uniform, and in fact, it is excessively sprayed. tendency. In particular, when a new sand blasting is started, it is necessary to first fill the dry boring material into the storage tank and apply water pressure until the water reaches the particles of the boring material, and there is no problem in starting the operation. Therefore, the object of the present invention is to provide a blasting material and a blasting method, wherein the blasting treatment removes the coating film and the blasting material has less dust, does not require a large-scale blasting device, and does not require blasting treatment. Water treatment. The blasting material of the present invention contains a moisture content of 5 to 30% by mass relative to the boring material, and is prepared in advance to uniformly wet all of the boring material particles. The blasting material of the present invention is the same as the dry blasting, and is filled with the blasting material storage tank of the blasting device, and is sprayed with the compressed air toward the object to be treated, and the dust retained by the blasting material is used to collect the dust, thereby preventing the dust from being trapped. The occurrence of dust. Further, according to the blast material of the present invention, since only a necessary amount of moisture for preventing dust from scattering is contained, excessive waste water does not occur during and after the blasting treatment. Further, the blast material of the present invention can be provided in a small package or the like in a state where water modulating is completed, and a conventional water tank for storing water is not required. In addition, when the moisture content is 5% by mass or less relative to the boring material, 201236816 may not sufficiently prevent the occurrence of dust due to insufficient moisture. On the other hand, when water containing more than 30% by mass relative to the boring material is contained, the moisture is separated from the slag, and excessive waste water is generated during and after the blasting treatment. Further, the blast material of the present invention preferably contains a surfactant. When the blast material of the present invention contains moisture and is sent out from the blast material storage tank, the blast materials are likely to agglomerate each other and the fluidity is deteriorated. Therefore, the blasting material of the present invention contains a surfactant to improve fluidity, and can be stably delivered. Further, the blast material of the present invention preferably contains a humectant. For the purpose of coating removal, the particles of the boring material are smaller (particle diameter 〇. 1~ 0.15 mm) are more effective. At this time, the boring material can retain more water (maximum 20% by mass). To the extent that the coating is removed, it is preferably 15 to 30% by mass of water, and a moisturizing agent should be contained. When the material to be sprayed is prepared, it is preferable that the particles are large (particle diameter: 0.6 to 0.85 mm). In this case, the amount of moisture retained by the boring material is small (up to a maximum of 15% by mass), however, spraying When the material is prepared, it is preferably 5 to 20% by mass of water, and a moisturizing agent should be contained. The blasting material of the present invention can increase the amount of water which can be retained by the boring material by containing a humectant, and the slag-cut material can uniformly retain moisture. Further, the blast material of the present invention preferably contains a rust inhibitor. The blasting material of the present invention can extend the application interval of spraying and painting after blasting by containing a rust preventive. (1) The blasting material prepared in advance to uniformly wet all the boring material particles in accordance with the moisture of 5 to 30% by mass relative to the boring material can be treated in the same manner as in the dry blasting of -8-201236816 The object is sprayed, and the dust is captured by the moisture retained by the sand blasting material to prevent dust from occurring. Further, since excessive waste water does not occur during and after the blasting treatment, there is no need for water treatment other than the sinter material processing after the treatment. Further, it is provided in a small package or the like, and a conventional water tank for storing water is not required, and the entire blasting apparatus can be miniaturized, and the entire blasting apparatus can be installed in a work place such as on-site construction. Further, the hose for connecting the nozzle for blowing and the storage tank for the blasting material can be connected to the storage tank of the blasting material as long as it has the shortest length, and the treatment capacity can be reduced, and a small air compressor can be used. (2) The surfactant is used to improve the fluidity, and the blasting material can be stably sent out from the blasting material storage tank. (3) The humectant is added to increase the amount of moisture that can be retained by the boring material, so that the slab can be uniformly retained with moisture. (4) The rust-preventing agent is included to extend the construction interval of spraying and painting after blasting. For example, JIS H8 3 00 has a specification that should be carried out within 4 hours from sand blasting to spray coating. However, it is possible to prevent the rust inhibitor from being applied after 1 to 2 days. The adhesion of the sprayed film during spraying is reduced, and the workability is improved. [Embodiment] Fig. 1 is a schematic view showing a configuration of a blasting apparatus using a blast material according to an embodiment of the present invention. In the first embodiment, a blasting apparatus for a blasting apparatus according to an embodiment of the present invention includes: a blasting material storage tank 2 for storing blasting -9-201236816 material 1 as a blasting material; a blasting nozzle 3 to which the blast material 1 is blown; and a blasting hose 4 for joining the blasting material storage tank 2 and the blasting nozzle 3. Further, in the blasting apparatus, the air compressor 5 for supplying compressed air is additionally connected. Below the blasting material storage tank 2, there are provided: a discharge portion 2a for performing discharge of the blast material 1, and a mixing portion 2b for mixing the blast material 1 and compressed air and transporting it to the blast hose 4. The mixing unit 2b and the air compressor 5 are connected by an air hose 6a. Further, the air compressor 5 and the upper portion of the blast storage tank 2 are connected by an air hose 6b. The blast material storage tank 2 according to the embodiment of the present invention is a pressurized type in which the blast material 1 is sent by pressurization with compressed air. However, it may be an open type without pressure. Further, the blast material 1 of the present embodiment generally has a poor fluidity compared to the conventional dry boring material, so that the discharge portion 2a is discharged by various amounts such as a quantitative transfer table, a screw conveyor, or a rotary valve conveyor. The air compressor 5 is supplied and discharged in a quantitative manner to the mixing unit 2b, and an electric type or an engine type is used. The oil and water in the compressed air generated by the air compressor 5 are supplied to the blasting material storage tank 2 and the mixing unit 2b via the air hoses 6a and 6b via a discharge removing device (not shown). Further, although not shown, an operation switch, a valve, and the like for performing the start and stop of the blasting apparatus are provided. The blasting material 1 used in the blasting apparatus contains water in an amount of 5 to 30% by mass based on the boring material, and is prepared in advance by uniformly wetting all the granules. For the boring material, all types of non-metallic boring materials for blasting, such as alumina, garnet, strontium sand, glass -10- 201236816 beads, strontium carbide, and slag, can be used. The slabs and moisture are mixed and prepared in advance, for example, and packaged into 1 bag of 10 to 25 kg small packages. In addition to the water, it may contain a rust preventive, a surfactant, or a moisturizer. As the rust preventive agent, for example, an amine-based rust preventive agent such as a commercially available product can be used. As the surfactant, for example, a commercially available naphthalenesulfinic acid formaldehyde-based compound, sodium alkylbenzenesulfonate, polyoxyethylene alkyl ether, and polyoxyethylene fatty acid methyl ester can be used. As the humectant, for example, a sodium polyacrylate system or the like which is a commercially available product can be used. The moisture content is adjusted to be in the range of 5 to 30% by mass, depending on the type and particle size of the boring material. For example, when the boring material is alumina and the particle diameter is 0.1 to 0.15 mm, a bag having a water content of 5% by mass and 10 mass%/ are prepared. Bags.....30% by mass of bags, etc., to a certain extent, the amount of water is different. Further, the packaging bag containing the blast material 1 is a storage bag that does not change the amount of water due to evaporation or the like. Further, when the surfactant is contained, the surfactant contained in the blasting material 1 contains, for example, 1 to 5 mass% of a surfactant. When the alumina particles and the boring material having a diameter of 0.1 to 0.15 mm are transported from the blast material storage tank 2 to the discharge portion 2a and from the discharge portion 2a to the mixing portion 2b, the blast materials 1 are easily agglomerated. The fluidity is poor, and the fluidity can be improved by containing a surfactant. Thereby, the blast material 1 can be stably sent out from the blast material storage tank 2. Further, in the blast material 1, it is preferred to contain a humectant. When the particle diameter of the boring material is 0.1 to 0.15 mm, the amount of moisture retained by the boring material is 20 -11 - 201236816% by mass, and when the particle diameter is 0.6 to 0.85 mm, it is 15% by mass. Separate by retaining more than the above water. Therefore, if it contains a humectant, it can increase the amount of moisture that the boring material can retain, and the slab can retain moisture evenly. In addition, in addition to moisture, enamel cuts include rust inhibitors, surfactants, humectants, etc., rust inhibitors, surfactants, humectants, etc., and the total amount of moisture, relative to 硏The material to be cut is preferably 5 to 30% by mass. Thereby, even if a rust preventive agent, a surfactant, a humectant or the like is contained, the ratio of the slag-cut material in the entire blast material does not change, and the target blast performance can be maintained. In the blasting apparatus having the above configuration, the blast material 1 which is a necessary component prepared in advance is placed in the blast material storage tank 2. When the blasting apparatus is started, compressed air is supplied from the air compressor 5 to the blasting material storage tank 2 and the mixing unit 2b, and is ejected from the blasting nozzle 3 via the blasting hose 4. The blast material 1 is quantitatively discharged by the discharge portion 2a, and is sent to the mixing portion 2b. Further, the blasting material 1 is pulverized by the compressed air in the mixing portion 2b, and is then ejected from the inside of the blast hose 4 by the injection of the compressed air, and then ejected from the ejection port 3a of the blasting nozzle 3. The blast material 1 impacts the surface of the workpiece X, and peels off the deposit Y of the coating film, rust, dirt, and the like, and then scatters and accumulates around the workpiece X. In the blasting material 1 of the present embodiment, since the surface of the boring material particles is covered with a moisture film, when the blasting nozzle 3 is sprayed and impacts the surface of the workpiece X, the moisture retained by the boring material is first The surface of the deposit Y is attached to the surface of the deposit Y, and thereafter, the smashing and peeling of the deposit Y by -12-201236816 occurs by the slag-cutting material particles. Therefore, it is possible to efficiently wet the dust of the deposit which occurs when the deposit γ is pulverized and peeled off, and the occurrence of dust is suppressed. Further, in the case of the blast material 1 according to the embodiment of the present invention, it is possible to arbitrarily select a small package of the blast material 1 having a different moisture content of 5 to 30% by mass, and it is possible to suppress the state of the object X to be treated. The occurrence of dust. Further, in the case of the blast material 1 of the present embodiment, even when the amount of injection is not stabilized, water is not sprayed, and the amount of moisture is constant with respect to the blast material 1 to be sprayed, so that excessive water scatter can be suppressed. And excessive dust occurs when there is insufficient water. As described above, according to the blast material 1 of the embodiment of the present invention, the object X can be sprayed in the same manner as the dry blasting, and the dust retained by the blast material 1 can be used to collect the dust, thereby preventing the occurrence of dust. . In addition, after the blasting treatment and after the treatment, excess waste water does not occur, and it is not necessary to treat the water other than the slag cutting material after the treatment. Here, the difference between the blasting apparatus and the conventional blasting apparatus according to the embodiment of the present invention will be described with reference to Fig. 2 . Fig. 2 is a blasting apparatus (Fig. (a)) and a conventional blasting apparatus according to an embodiment of the present invention (a comparison diagram of (b) of the figure. Fig. 2(a) shows the implementation of the present invention In the case of the blasting apparatus of the aspect, the blasting material storage tank 2 is installed in the working place, and the air compressor 5 installed on the ground is connected by the air hose 6, and as shown in the second (b) In the conventional sand blasting apparatus, the water supply device 1 1 and the air compressor 1 2 composed of the blasting material storage tank 10, the water tank 1 1 a, and the water pump 1 1 b are placed on the ground, from the ground to the working place. The blasting nozzle 13-201236816 13 is connected by the blasting hose 14 and the water hose 15. As shown in Fig. 2, the blasting apparatus according to the embodiment of the present invention contains 5~ with respect to the boring material. 30% by mass of water, all the slag-cutting particles are uniformly wetted, and the blasting material 1 prepared in advance is provided in a small package 1 a, etc., without the water tank 11a, the water pump lib, and the water hose 1 provided by the conventional blasting apparatus. 5, etc., it is possible to achieve miniaturization of the entire sandblasting device, and The entire sanding device is installed in a work place such as a site construction. Therefore, the blasting hose 4 for connecting the blasting nozzle 3 and the blasting material storage tank 2 to be blown can have a minimum length, and the treatment capacity can be reduced. Moreover, a small air compressor 5 can be used. On the other hand, in the conventional sand blasting device, since the water is supplied from the water tank 1 1 a and the water pump 1 1 b, it is relatively large and cannot be installed on the work site, but must be The blasting hose 4 is of course longer from the ground to the work site by the long water hose 15. [Example] The blasting test is performed by the blasting apparatus using the blasting material 1 of the above embodiment. As shown in Fig. 3(a), the steel plate 7 is made of a square with a side of 1 m. The steel plate 7' is a black leather plate (SS400) with a thickness of 3.2 mm. The steel plate 7, such as the third (b) As shown in the figure, it is mounted vertically on a support table (not shown), and the spray angle of the sandblasting nozzle 3 toward the center of the steel plate 7 is a right angle, and the distance between the steel plate 7 and the front end of the sandblasting nozzle 3 is 200 mm. Next, the blasting material 1 is passed through the blasting hose 4 The front end of the sand nozzle 3 is blown to the steel plate 7. -14- 201236816 In this state, the sand blasting material 1 is struck against the surface of the steel plate 7 to remove the oxide film (black skin) on the surface of the steel plate 7, and usually dry blasting is performed. In this case, the state of occurrence of the white blasting material and the diffusion form of the moisture adhering to the surface when the various blasting materials 1 are projected are observed to confirm the effect of the blasting material 1. Further, the amount of the blasting material 1 is relatively Various amounts of water were set in 1 kg of the kneaded material, and in addition to the amount of water, sodium alkylbenzenesulfonate as a surfactant and sodium polyacrylate as a moisturizing agent were added as appropriate. The projection of the blast material 1 (cutting material 1 kg + moisture) was performed for about 1 minute, and the state of the surface of the steel plate 7 was observed and evaluated. The benchmark for evaluation is based on the assessment benchmark shown in Table 1. The test results are shown in Table 2 to Table 6. -15- 201236816 [Table i] Status detailed status 槪 图 判定 判定 判定 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Wet dripping dripping less dust less f Suitable for 5 Wet dripping dripping oversized dust less 1 Not suitable for -16 - 36368 [Table 2] Test condition results 硏Dropped material size (particle size mm) Moisture amount (% by mass) Remarks status judgment 1 % Adding surfactant 1 Not suitable for 3% Adding surfactant 1 Not suitable for 5% Adding surfactant 2 Suitable for 10% Adding surfactant 2 Suitable for 15% Adding surfactant 3 Suitable for 20% Adding surfactant Additive moisturizer 3 Suitable for Alumina system 0.15 ～0_1 25% Add surfactant to add humectant 3 Suitable for 30% Add surfactant to add humectant 4 Suitable for 35% Add surfactant to add humectant 5 Not suitable for 40% Add surfactant Add humectant 5 Not suitable -17- 201236816 [Table 3] Test condition results硏Making material size (particle size mm) Moisture content (mass ° /.) Remarks status determination 1% Adding surfactant 1 Not suitable for 3% Adding surfactant 1 Not suitable for 5% Adding surfactant 2 Suitable for 10% Adding interface activity Agent 2 Suitable for 15% Adding surfactant 3 Suitable for 20% Adding surfactant Additive humectant 4 Suitable for alumina system 0.3-0.22 25% Adding surfactant to add humectant 4 Suitable for 30% Adding surfactant Additive humectant 4 Suitable 35% Adding surfactant to add humectant 5 Not suitable for 40% Adding surfactant to add humectant 5 Not suitable for -18- 201236816 [Table 4] Test conditions Result 硏Dropped material size (particle size mm) Moisture content (% by mass) Remarks Condition determination alumina system 0.85 ~ 0.6 1% Adding surfactant 1 Not suitable for 3% Adding surfactant 1 Not suitable for 5% Adding surfactant 2 Suitable for 10% Adding surfactant 3 Suitable for 15% Adding surfactant Adding humectant 3 Suitable for 20% Adding surfactants Adding humectant 4 Suitable for 25% Adding surfactant additive Moisturizer 4 Suitable for 30% Adding surfactants Adding humectant 4 Suitable for 35% Adding surfactants Adding humectants 5 Not suitable for 40% Adding surfactants Adding humectants 5 Not suitable for 201236816 [Table 5] Test conditions Results 硏 Cutting material丄pin Looseness (particle size mm) Moisture content (% by mass) Remarks Judgment status garnet 0.6 to 0.25 1% Adding surfactant 1 Not suitable for 3% Adding surfactant 1 Not suitable for 5% Adding surfactant 2 Suitable for 10% Adding Surfactant 3 Suitable for 15% Adding Surfactant 3 Suitable for 20% Adding Surfactant Adding Humectant 3 Suitable for 25% Adding Surfactant Adding Humectant 3 Suitable for 30% Adding Surfactant Adding Humectant 4 Suitable for 35% Add Surfactant added humectant 5 Not suitable for 40% Adding surfactant Additive humectant 5 Not suitable -20- 201236816 [Table 6] Test condition results 硏Making material particle size (particle size mm) Moisture amount (% by mass) Remarks status determination melting Slag system (neobrast) 0.8 ~ 0.3 1% Addition of surfactant 1 Not suitable for 3% Addition Active Agent 1 Not suitable for 5% Adding Surfactant 2 Suitable for 10% Adding Surfactant 3 Suitable for 15% Adding Surfactant 4 Suitable for 20% Adding Surfactant Adding Moisturizer 4 Suitable for 25% Adding Surfactant Adding Moisturizer 4 Suitable 30% Adding surfactants Adding humectant 4 Suitable for 35% Adding surfactants Adding humectants 5 Not suitable for 40% Adding surfactants Adding humectants 5 Not suitable for results, it can be known that dust occurs when the water content is 5% or less More, the dust suppression effect of water is less. In addition, it can be known that when the amount of water exceeds 30%, the occurrence of dust is reduced. However, after the blasting, the water is separated from the boring material, and the dripping of excess water occurs, in addition to the treatment of the boring material, it is necessary to carry out Treatment of excess water. According to the above, when the blasting material contains 5 to 30% of water and the blasting material 1 which is prepared by uniformly immersing all the boring material particles in the same manner, it is confirmed that the occurrence of dust can be suppressed, and the excess water after the treatment is not required. Processing. Further, in order to confirm the effect of the rust preventive agent, the sprayed film was formed by the blasting method of the present embodiment and the conventional dry blasting method, and the adhesion of the sprayed film -21 - 201236816 was measured to confirm the effect of the rust preventive. For the test piece, the steel plate of SS4 00 is sandblasted by the slab cutting material. When the method is used, the spray blasting method is formed 2 days after the blasting treatment, and 2 hours after the blasting treatment (JIS) A spray coating is formed after 4 hours. The method of measuring the "/tightness test (A method)" attached to Appendix A of JIS H8300 (2005) is carried out. Test conditions are shown in Table 7. The same size of the sandblasting traditional dry H8300 for the force, with .2.2 tensile and test knots -22- 201236816 [Table 7] Test conditions blasting method 硏 硏 之 之 粒子 粒子 粒子 粒子 粒子 粒子 粒子 粒子 粒子 粒子 粒子MPa) Determination of 値 Average blasting method of this embodiment Alumina + moisture containing rust inhibitor 15% by mass 0.1 to 0.85 (mm) Plasma spraying device AL5%^jg (film thickness 150 μm) 7.6 7.4 8.2 8.3 7.9 8.2 7.93 Conventional dry blasting method Alumina 0.1 to 0.85 (mm) Plasma spraying equipment AL5%Mg (film thickness 150μηι) 7.4 7.8 7.93 8.1 7.9 Sand blasting method of this embodiment Alumina + moisture containing rust inhibitor 15% by mass 0.1 to 0.85 (mm) Gas talk spray device AL5%Mg (film thickness 150μιη) 5.62 6.24 5.58 6.16 6.35 7.01 6.33 Traditional dry blasting method Alumina 0.1~0.85 (mm) Gas talk spray device AL5%Mg (film thickness 150μιη) 5.87 5.96 6.53 5.76 6.09 Other conditions: The amount of rust inhibitor: 0.5% by mass of rust inhibitor in the 7_W component. The amount of moisture in the boring material of this example: 1.5% by mass relative to the boring material Moisture (including the above rust inhibitor) In the present embodiment, after the blasting treatment, 2 曰 (48 hours), the conventional dry blasting of the spray film is formed, and after 2 hours after the blasting, the spraying device is formed. The operating conditions are based on representative standard conditions. Test piece material: SS400 steel plate size: thickness 6mmxl50mmx300nim Adhesion measurement part number: 5 parts of the central part of the test piece were measured __ -23- 201236816 The result was confirmed, the application of the sprayed material to the blasting site In the case of the blasting material 1, it is not restricted by the blasting treatment to the inside of the spraying booth, and the adhesion force of the spray coating is reduced after 2 days. The blasting material and the blasting method of the present invention are used for the removal of the deteriorated coating which is carried out for the purpose of corrosion prevention of metal and the blasting treatment for dust and scattering which occur during the preparation of the spray coating. In particular, dusting measures require a large cost when repainting bridges and bridges on rivers, etc. Compared with this, it is possible to significantly reduce the occurrence of dust itself, and it is extremely advantageous to greatly reduce the cost of spraying construction. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a configuration of a blast material using an embodiment of the present invention. Fig. 2 is a comparative explanatory view of a blasting apparatus and an embodiment of the present invention. Figure 3 is an explanatory diagram of the conditions of sandblasting test. [Explanation of main component symbols] 1 : Sand blasting material 2 : Sand blasting material storage tank 3 : Sand blasting nozzle 4 : Sand blasting soft management When the work is completed at 4 o'clock, there is no rust prevention of the product, and there is a lot of resistance to the material. Deterioration coating, because this hair repainting and sandblasting device traditional sandblasting equipment-24- 201236816 5 : Air compressor 6, 6a, 6b: air hose -25