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Molybdate/sulfuric acid anodising of 2024-aluminium alloy: influence of inhibitor concentration on film growth and on corrosion resistance

机译:2024-铝合金的钼酸盐/硫酸阳极氧化:抑制剂浓度对膜生长和耐蚀性的影响

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摘要

In order to replace hexavalent chromium in anodising processes, molybdate species have been used as corrosion inhibitors. This article describes effects of molybdate additions to sulfuric acid on the anodising of Al 2024 alloy. Different electrochemical techniques were employed to study electrolytes, anodic film growth and corrosion resistance. These analyses have shown modifications as a function of molybdate concentration. At low concentrations, anodic layer formation was hindered and corrosion performance of these oxide films was slightly improved. On the contrary, at high concentrations, anodic layer growth was promoted and corrosion resistance was significantly improved. (C) 2003 Elsevier Science B.V. All rights reserved. [References: 19]
机译:为了在阳极氧化工艺中替代六价铬,钼酸盐已被用作缓蚀剂。本文介绍了向硫酸中添加钼酸盐对Al 2024合金阳极氧化的影响。采用了不同的电化学技术来研究电解质,阳极膜的生长和耐腐蚀性。这些分析表明修饰是钼酸盐浓度的函数。在低浓度下,阳极层的形成受到阻碍,这些氧化物膜的腐蚀性能略有提高。相反,在高浓度下,促进了阳极层的生长并且显着提高了耐腐蚀性。 (C)2003 Elsevier Science B.V.保留所有权利。 [参考:19]

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