摘要
Abstract
It was of great significance to the efficient formation of rare earth conversion coating with high corrosion resistance by using chemical immersion method through the addition of oxidant and promoter of coating-formation for the preparation of rare earth conversion coating on the surface of zinc plating. The results show that through the electrochemistry test, morphology analysis and dynamics data calculation, reductive reaction at micro-cathode is speeded up by the addition of oxidant H2O2 into the treatment solution, and promoting the increase of Ph within the micro-cathode region, which is favorable to the formation of conversion coating with high content of Ce. The addition of coating-formation promoter can improve the shape quality of the coating, whose essence is to lower effectively the apparent activation energy for coating-formation reaction with three stages,giving rise to the realization of promotion for conversion coating's growing.关键词
氧化剂/成膜促进剂/稀土转化膜/成膜机理Key words
oxidant/ accelerator/ rare earth conversion coating/ formation mechanism分类
矿业与冶金
