TC4-DT钛合金与异种材料接触腐蚀与防护研究

摘要

The susceptibility to galvanic corrosion between TC4-DT titanium alloy and dissimilar materials such as aluminum alloys, steels and their anodized composites were studied by measuring current density of the mentioned couples. The results indicated that galvanic corrosion was easily produced when TC4-DT titanium alloy was in direct contact with aluminum alloys or steels. TC4-DT titanium alloy was prohibited to contact with aluminum alloys and steels directly. It was necessary to protect for aluminum alloys and steels when TC4-DT titanium alloy was used. The anti-corrosion property can be high by anodizing both titanium alloy and aluminum alloys. Also there was a relatively decrease in the galvanic corrosion sensitivity through anodizing titanium and plating steels with a Cd-Ti layer.%通过测定TC4-DT钛合金与铝合金、钢及其阳极氧化或电镀后组成的电偶对的电偶电流的方法,研究了TC4-DT钛合金与上述异种材料之间发生电偶腐蚀的敏感性.结果表明:TC4-DT钛合金与铝合金、钢接触时极易发生电偶腐蚀,不能直接接触使用,必须采取有效的防护措施.对钛合金和铝合金进行阳极氧化处理,可降低电偶腐蚀敏感性；对钛合金进行阳极氧化处理,同时对钢进行电镀镉-钛处理可以在一定程度上降低电偶腐蚀敏感性.