对铝及其合金进行钝化处理是提高其耐蚀性的有效手段,铬酸盐钝化处理可显著提高铝及其合金的耐蚀性.但六价铬钝化工艺毒性大,对环境污染严重,因此研究开发无毒或低毒的钝化工艺势在必行,开发实用性强、环境友好型铝合金钝化技术是钝化工艺发展的方向.针对国内外几种铝合金无铬钝化处理工艺,包括钼酸盐钝化、含锆溶液钝化、含钛溶液钝化、稀土钝化等工艺的特点及其发展现状进行了详细的阐述.
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