Effect of Mn2+ on Phosphating of Galvanized Steel
摘 要
通过开路电位-时间曲线和扫描电镜(SEM)的方法研究了镀锌板在含有不同浓度Mn2+磷化液中的磷化成膜过程.结果表明,在磷化液中添加Mn2+,磷化初始电位降低,有利于磷化膜的形成;当Mn(NO3)2含量为0.6g/L时,所生成的磷化膜结晶细化,均匀致密.
Abstract
The phosphating process of galvanized steel in phosphating solution with different contents of Mn2+ was investigated by means of open circuit potential-time curves and scanning electron microscopy (SEM).The results showed that Mn2+ in phosphating solution could decrease the initial potential of phosphating and promote the formation of phosphating coating.When the content of Mn(NO3)2 in phosphating solution was 0.6 g/L,the crystals of the phosphate were fine and the phosphating coating formed was uniform and compact.
中图分类号 TG178
所属栏目 应用技术
基金项目 河南省自然科学研究项目(2008A150016);新乡市科技发展计划(07G058)
收稿日期 2009/7/6
修改稿日期 2009/8/31
网络出版日期
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引用该论文: ZHANG Sheng-lin,ZHANG Xiao-lin,MA Qiang,LI Wei-wei. Effect of Mn2+ on Phosphating of Galvanized Steel[J]. Corrosion & Protection, 2010, 31(6): 466~468
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参考文献
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【3】Ogle K,Tomand A.The Alkaline Stability of Phosphate Coatings I: Atomic Emission Spectroelectrochemistry[J].Corrosion Science,2004,46(4):979-995.
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