电沉积Fe-Cr-Ni合金的电化学腐蚀行为
Electrochemical Corrosion Behavior of Electrodeposited Fe-Cr-Ni Coating
摘 要
以硫酸盐为主盐,研究了工艺参数中温度、电流密度对Fe-Cr-Ni镀层沉积速率和腐蚀性能的影响.采用电化学试验方法研究不同条件下所获得的镀层在NaCl溶液中的腐蚀行为,结果表明,在饱和NaCl溶液中镀层都有钝化性能.60 ℃下获得的镀层有明显过钝化现象,抗腐蚀性能较差.不同电流密度下的镀层显示了不同的电化学性能.电流密度为5 A/dm2时,处于钝态时,电流随着电位的正移逐渐增大是一个非常缓慢的过程,钝化膜仍然发挥作用.在饱和NaCl溶液中,电流密度为5 A/dm2时所获得的镀层的耐蚀性能较好.
电沉积
腐蚀行为
Fe-Cr-Ni coating
corrosion behavior
electrodeposition
Abstract
Effects of temperature and currention density on deposition rate and corrosion behavior of Fe-Cr-Ni electrodeposited coatings were investigated.Corrosion behavior of the coating was studied with electrochemical method.The coating showed passivate behaivor in saturated NaCl solution,but exhibited over-passsivation phenomenon at 60℃.The coating exhibited different electrochemical performance at different current densities.When the current density was 5 A/dm2,the passive film showed excellent corrosion resistance without over passivation phenomenon.
中图分类号 TQ153.2
所属栏目 试验研究
基金项目
收稿日期 2007/5/19
修改稿日期 2007/7/10
网络出版日期
作者单位点击查看
引用该论文: XI Yan-jun,LIU Yong-jun,LU Jin-bin,WANG Zhi-xin. Electrochemical Corrosion Behavior of Electrodeposited Fe-Cr-Ni Coating[J]. Corrosion & Protection, 2008, 29(7): 375～377
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