201011127 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種鋁或鋁合金表面陽極處理方法。 【先前技術】 為了適應消費者講究金屬質感之發展趨勢，電腦、通 訊、消費性電子等3C產品之高等級產品逐漸以金屬機殼 為主流。金屬材料具有電磁遮罩效果佳，散熱性良好，剛 性佳，耐衝擊等優點，同時還具有可回收利用之環保特性。 ❿ 、鋁及其合金具有重量輕、散熱快和外觀精美等優點， 並可依需求而選擇亮面或霧面處理，因而很適於金屬機殼 表面圖案之製作。在應用上常藉由陽極處理在表面形 廢層氧化物膜，該氧化物膜可在鋁材表面形成堅硬耐 2蝕性極高且色澤優美之外表。習知的於金屬機殼表 不同色彩之氧化膜之陽極處理工藝均採用多次陽極 =多次著色實現’其中每次陽極處理後均要藉由遮蔽 ::對下次陽極處理之區域進行劃分，這種方法雖能在 二 面獲得多色彩氧化膜，但工藝較為複雜，且因為要 ^難It遮蔽之治具’使得設計成本較高。同時，該方法 、^精密度之裝飾性圖、纹。而且，該方法所獲得之 效果膜缺乏立體感’在同—金屬基體上難以獲得不同表面 【發明内容】 =鑒於此，本發明提供一種於同一鋁或鋁合金基體上 于同表面效果之陽極處理方法。 種is或銘合金表面陽極處理方法，包括以下步驟： 7 201011127 ·· 提供一鋁或鋁合金基體，該基體包括一内表面及與該 .内表面相背之外表面； 對該基體之外表面進行第一種機加工處理，使該外表 面具有第一種機加工表面效果； 對該基體進行第一次陽極處理，以在基體表面形成具 有第一種顏色之氧化膜； 去除部分或全部形成於基體内表面上之氧化膜，以使 Φ該基體導電； 對該基體之外表面進行不同於第一種機加工之第二種 2加工處理，去除外表面之部分氧化膜，並使該去除氧化 、之區域具有第二種機加工表面效果； 對該基體進行第二次陽極處理，以在該具有第二種機 加工表面效果之區域形成具有不同於該第一種顏色之第二 種顏色之氧化臈。 一 相較於現有技術，本發明鋁或鋁合金表面陽極處理方 ❹藉由對IS或IS合金表面進行—次以上之機加卫處理以獲 L不同之機加工表面效|，然後直接對每次機加工後之表 :仃陽極氧化處理，並染上不同之顏色，由此在同一基 二▲面獲得具有立體感之不同表面效果。本方法無需 二=用於劃分陽極處理區域之遮蔽治具，I藝簡單，成本 【實施方式】 對明較佳實施例銘或紹纟金表面陽極處理方法藉由 明^或鋁s金之金屬基體之陽極表面處理為例進行說 包括如下步驟·· 8 201011127 (1) 提供一鋁或鋁合金基體，該基體包括一内表面及 • 與該内表面相背之外表面。 (2) 對該基體之外表面進行第一種機加工處理，使該 外表面具有第一種機加工表面效果。例如，該基體外表面 進行喷砂處理，使其呈現咕光霧面效果。 一 （3)對該基體進行第一次陽極處理，以在基體表面形 成氧化膜。該步驟包括：首先將該基體於19〜21乞、含 ❹180〜220g/L硫酸之陽極處理溶液中，以1〇〜12v的電壓進 行陽極氧化處理45〜55分鐘。其中硫酸之優選濃度為 190〜21〇g/L。並對該第一次陽極處理後之金屬基體進行第 一次著色處理，使第一次陽極處理生成之氧化膜具有第一 種顏色。該第一次著色處理可以為吸附著色或者化學著 色，本實施例為吸附著色。然後，對該著色處理後之基體 於含有封孔劑之溶液中進行封孔處理以提高其表面氧化臈 之防污染和抗腐蝕性能。本實施例選用R5〇〇型號活性劑 ❿作為封孔劑，處理溫度為90〜lOiTC，處理時間為12〜18分 鐘。最後將基體於6(TC左右下烘乾。 (4) 藉由鐵射雕刻去除部分或全部形成於基體内表面 上之氧化膜，以使該基體導電。 (5) 對該基體之外表面進行不同於第一種機加工之第 一種機加工處理，去除外表面之部分氧化膜，並使該去除 氧化膜之區域具有不同於第一種機加工效果之第二種機加 工表面效果。例如，該第二種機加工處理後之區域呈現精 、-田之線條紋路效果’比如類似於光碟表面紋路的紋、 太陽紋等。 9 201011127 (6)對該基體進行第二次陽極處理。該步驟包括：首 先將該基體於19〜211：、含180〜220g/L硫酸之陽極處理溶 液中’以9.5〜10.5V之電壓進行陽極氧化處理28〜32分鐘。 並對該第二次陽極處理後之金屬基體進行第二次著色處 理，使該第二次陽極處理生成之氧化膜具有不同於第一次 陽極處理氧化膜顏色之第二種顏色。該第二次著色處理可 以為吸附著色或者化學著色，本實施例為吸附著色。然後， 參對該，色處理後之基體於含有封孔劑之溶液中進行封孔處 理以提高其表面氧化膜之防污染和抗腐蝕性能。本實施例 選用SH2型號封孔劑，處理溫度為9〇〜1〇(rc，處理時間 為12〜18分鐘。最後將基體於6(rc左右下烘乾即可與該 鋁或鋁合金基體表面獲得兩種不同表面效果之雙色陽極表 面。 第一次陽極處理前，還對基體進行陽極處理前 ❿ =理。該月’j處理包括：用含有相應金屬脫脂劑之溶液清洗 ，然後將該基體置於含鱗酸和硫酸之溶液進行化學抛 2處理，接著用m4G%石肖酸之溶液對該化學拋光處理 =^屬基體剝黑膜，以去除卫件因上述化學拋光處理時 於其表面形成之一層黑色的膜。 :::解，重複以上步驟⑷至⑷，可以於該基體 上獲得更多表面效果、多色彩之陽極表面。 法於現有技術，本發明㈣銘合金表面陽極處理方 去错由對銘或鋁合金表面進 得不同之她“全機加工處理以獲 面進行陽：=面效果’然後直接對每次機加工後之表 陽才乳化處理，並染上不同之顏色，由此在同―基 201011127 體表面獲得具有立體感之不同表面效果。本方法無需專門 設計用於劃分陽極處理區域之遮蔽治具，工藝簡單，成本 較低。201011127 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to an anode treatment method for aluminum or aluminum alloy surfaces. [Prior Art] In order to adapt to the trend of consumers paying attention to metal texture, high-grade products of 3C products such as computers, communications, and consumer electronics are gradually taking metal casings as the mainstream. The metal material has the advantages of good electromagnetic shielding effect, good heat dissipation, good rigidity and impact resistance, and also has environmentally-friendly characteristics that can be recycled. ❿, aluminum and its alloys have the advantages of light weight, fast heat dissipation and exquisite appearance, and can be selected for bright surface or matte finish according to requirements, which is very suitable for the surface pattern of metal casings. In the application, the surface oxide layer film is often treated by anodizing, and the oxide film can be formed on the surface of the aluminum material with high hardness and high color. Conventional anodic treatment processes for oxide films of different colors on metal casings are performed by multiple anodes = multiple colorings. 'After each anode treatment, it is shielded by:: dividing the area of the next anode treatment Although this method can obtain a multi-color oxide film on both sides, the process is complicated, and the design cost is high because it is difficult to shield it. At the same time, the method, the decorative pattern and texture of precision. Moreover, the effect film obtained by the method lacks a three-dimensional effect. It is difficult to obtain different surfaces on the same metal substrate. [In view of this, the present invention provides an anodizing treatment on the same aluminum or aluminum alloy substrate on the same surface effect. method. An is or alloy surface anodizing method comprising the following steps: 7 201011127 · Providing an aluminum or aluminum alloy substrate, the substrate comprising an inner surface and an outer surface opposite the inner surface; the outer surface of the substrate Performing a first machining process such that the outer surface has a first machined surface effect; performing a first anodic treatment on the substrate to form an oxide film having a first color on the surface of the substrate; removing part or all of the formation An oxide film on the surface of the substrate such that the substrate is electrically conductive; the outer surface of the substrate is subjected to a second processing other than the first machining, the partial oxide film of the outer surface is removed, and the removal is performed. The oxidized region has a second machined surface effect; the substrate is subjected to a second anodization to form a second color having a different color than the first color in the region having the second machined surface effect Oxide. Compared with the prior art, the surface anodized aluminum or aluminum alloy surface of the invention is subjected to more than one machine-assisted treatment on the surface of the IS or IS alloy to obtain different machine surface effects of L, and then directly to each After the secondary machining, the table is anodized and dyed with different colors, so that different surface effects with three-dimensional effect are obtained on the same base. The method does not need two = masking jig for dividing the anode treatment area, I art is simple, cost [embodiment] The preferred embodiment of the invention or the surface anodizing method of Shaoshen gold by Ming or aluminum metal The anode surface treatment of the substrate is exemplified by the following steps: 8 201011127 (1) An aluminum or aluminum alloy substrate is provided, the substrate comprising an inner surface and a surface opposite to the inner surface. (2) The first machining treatment is performed on the outer surface of the substrate so that the outer surface has the first machined surface effect. For example, the outer surface of the substrate is sandblasted to give it a matte finish. (3) The substrate is subjected to a first anode treatment to form an oxide film on the surface of the substrate. The step comprises first anodizing the substrate in an anodizing solution of 19 to 21 Torr, containing 180 to 220 g/L of sulfuric acid, at a voltage of 1 Torr to 12 V for 45 to 55 minutes. The preferred concentration of sulfuric acid is 190 to 21 〇g/L. And performing the first coloring treatment on the metal substrate after the first anodization, so that the oxide film formed by the first anodizing treatment has the first color. The first coloring treatment may be adsorption coloring or chemical coloring, and this embodiment is adsorption coloring. Then, the colored substrate is subjected to a sealing treatment in a solution containing a sealing agent to improve the anti-pollution and anti-corrosion properties of the surface cerium oxide. In this embodiment, R5 〇〇 type active agent ❿ is used as a sealing agent, and the treatment temperature is 90~10 ioTC, and the treatment time is 12 to 18 minutes. Finally, the substrate is baked at about 6 (TC). (4) The oxide film formed on the inner surface of the substrate is partially or completely removed by iron engraving to make the substrate conductive. (5) The outer surface of the substrate is subjected to Unlike the first machining process of the first type of machining, a portion of the oxide film on the outer surface is removed, and the region where the oxide film is removed has a second machined surface effect different from the first machining effect. The second machined processed area presents a fine-and-field line stripe effect, such as a pattern similar to the surface texture of a disc, a sun pattern, etc. 9 201011127 (6) A second anodizing treatment of the substrate. The method comprises the following steps: first, anodizing the substrate in an anode treatment solution of 19 to 211: 180-220 g/L sulfuric acid at a voltage of 9.5 to 10.5 V for 28 to 32 minutes. The second metal substrate is subjected to a second coloring treatment, so that the oxide film formed by the second anodizing treatment has a second color different from the color of the first anodized oxide film. The second coloring treatment may be adsorption. Color or chemical coloring, this embodiment is adsorption coloring. Then, the color treated substrate is sealed in a solution containing a sealing agent to improve the anti-pollution and anti-corrosion performance of the surface oxide film. The embodiment selects the SH2 type sealing agent, the processing temperature is 9〇~1〇(rc, the processing time is 12~18 minutes. Finally, the substrate is obtained by drying on the surface of the aluminum or aluminum alloy substrate at 6 (r). Two-color anode surface with two different surface effects. Before the first anode treatment, the substrate is also subjected to anodizing treatment. The month 'j treatment includes: cleaning with a solution containing the corresponding metal degreaser, and then placing the substrate The chemical polishing treatment is carried out on the solution containing scaly acid and sulfuric acid, and then the chemical polishing treatment is performed on the substrate by using a solution of m4G% tartaric acid to remove the black film formed on the surface of the substrate due to the above chemical polishing treatment. One layer of black film. ::: Solution, repeating the above steps (4) to (4), can obtain more surface effects, multi-color anode surface on the substrate. According to the prior art, the invention (4) Ming alloy surface The anode treatment is wrong. It is different from the surface of the aluminum alloy or the aluminum alloy. It is “full-machine processing to obtain the surface for the positive:=face effect” and then directly emulsified and treated on the surface after each machining. Different colors, thus obtaining different surface effects with stereoscopic effect on the surface of the same base 201011127. This method does not need to be specially designed for dividing the masking fixture of the anode treatment area, and the process is simple and the cost is low.
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