アルミニウムの電気化学的性質と耐食性に及ぼす亜鉛,銅,マンガンの複合含有効果
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概要
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Aluminum and Al alloys containing Zn up to 0.75%, Cu up to 0.6% and Mn up to 0.3% were tested in sodium chloride solutions. Cu in aluminum has dominant effects on electrochemical properties. The pitting potential effectively lowers and unusual anodic polarization characteristics are found in aluminum containing a small amount of Zn. Zn in the alloys containing Cu has little effect. The corrosion weight loss of aluminum in immersing corrosion test increases with Zn content, while that in salt spray test increases with Cu content and remains unchanged with Zn content. The pitting corrosion resistance of aluminum can be evaluated in the alternating immersion corrosion test in which immersing in the solution follows by drying in flowing hot air. Pitting corrosion is suppressed by appropriate additions of Zn and Mn, but promoted by Cu in this test. The corrosion resistance has relations to such electrochemical properties as polarization characteristics but not to pitting potentials.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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