JP2010070790A - アルミニウム系金属の変色防止処理法 - Google Patents
アルミニウム系金属の変色防止処理法 Download PDFInfo
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Landscapes
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Abstract
【解決手段】アルミニウム系金属の変色防止処理法は、25℃のpHが5以下の酸性環境において、配合量が、0.05質量%以上、好ましくは0.05〜10質量%、更に好ましくは0.05〜5質量%の範囲内であり、炭素数1〜30の範囲内にあり、1個以上のカルボキシル基と、1個以上のヒドロキシル基を有するヒドロキシカルボン酸化合物で、アルミニウム系金属を処理する。
【選択図】なし
Description
本発明例1〜16
表1に記載するヒドロキシカルボン酸化合物を塩酸によって25℃でのpHを1.5に調整した水溶液100gに溶解し、試験液1〜16を調製した。
次に、アルミニウム鋳造合金[ADC−12(組成:Cu:1.5〜3.5%、Si:9.6〜12.0%、Mg:0.3%以下、Zn:1.0%以下、Ni:0.5%以下、Fe:1.3%以下、Mn:0.3%以下、Sn:0.3%以下、残Al)]の試験片(3×25×43mm)を240番研磨紙にて表面が均一になるように研磨した後、メタノールを用いて研磨粉の除去及び脱脂を行った。得られた試験片を、試験片の半分が変色防止剤に浸漬するように、サンプル管に入れた変色防止剤に浸漬した後、25℃で3時間静置した。その後、試験片を取り出し、浸漬部分の変色具合を観察した。
本発明例と同様の操作にて、比較試験液1〜8と試験片を調製し、本発明例と同様の方法にて試験を行った。得られた試験片の変色具合を本発明品と同様にした観察した。
なお、比較例9は、pH1.5の塩酸水溶液(ブランク)である。
比較例10〜13に記載の化合物を、48%濃度の水酸化カリウム水溶液で25℃でのpHを10に調整した比較例10〜13の試験液を作製し、本発明例と同様の操作にて、上記試験片に浸漬して同様に試験を行った。得られた試験片の変色具合を本発明品と同様にした観察した。
Claims (3)
- 25℃のpHが5以下の酸性環境において、ヒドロキシカルボン酸化合物でアルミニウム系金属を処理することを特徴とするアルミニウム系金属の変色防止処理法。
- ヒドロキシカルボン酸化合物が、炭素数1〜30の範囲内にあり、1個以上のカルボキシル基と、1個以上のヒドロキシル基を有する化合物である、請求項1記載のアルミニウム系金属の変色防止処理法。
- ヒドロキシカルボン酸化合物の配合量が、0.05質量%以上である、請求項1または2記載のアルミニウム系金属の変色防止処理法。
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| JP2018530677A (ja) * | 2015-10-14 | 2018-10-18 | ヘルムホルツ−ツェントルム ゲーストハハト ツェントルム フュアー マテリアル ウント キュステンフォルシュンク ゲーエムベーハー | マグネシウム又はマグネシウム合金用腐食防止剤組成物 |
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| CN110129804A (zh) * | 2015-10-14 | 2019-08-16 | 亥姆霍兹中心盖斯特哈赫特材料及海岸研究中心有限公司 | 用于镁或镁合金的腐蚀抑制剂组合物 |
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