为了取代重污染的六价铬电镀,实现清洁生产,保护生态环境,人们开发了三价铬电镀工艺和代铬工艺.介绍了三价铬电镀和代铬电镀工艺及其性能特点,提出了三价铬电镀的研究方向.硬铬镀层以硬度高达800～1 000 HV成为最硬的镀层,复合镀层目前作为主要的代硬铬层,概述了其研究动态,同时分析了三价铬镀硬铬镀层厚度在电镀一定时间后镀层不再增厚的原因.
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