传统的铝合金铬酸盐化学转化毒性大,对人体和环境有伤害.钴盐转化处理是一项无铬转化新技术,可以替代六价铬转化技术,应用前景广阔.介绍了钴盐无铬化学转化技术发展概况、成膜机理、工艺沿革、转化膜组成和结构,提出了新型钴盐无铬转化技术应在三价钴配体、协同金属离子、促进剂、水溶性有机物等方面进行深入研究,以优化槽液的使用性能,提高转化膜的耐腐蚀性和附着力.
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