引用本文:刘燕,朱子新,陈永雄,徐滨士,栗卓新.Zn-Al系列高速电弧喷涂层电化学防腐性能研究[J].中国表面工程,2004,(5):23~25,30
.Electrochemical Corrosion Behavior of Arc Sprayed Zn-Al Coatings[J].China Surface Engineering,2004,(5):23~25,30
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Zn-Al系列高速电弧喷涂层电化学防腐性能研究
刘燕,朱子新,陈永雄,徐滨士,栗卓新
作者单位
摘要:
采用粉芯丝材和高速电弧喷涂技术制备高Al含量的Zn-26％Al涂层。通过电化学的方法测试涂层在5％NaCl溶液下的腐蚀行为，并与由实芯丝材纯Zn、纯Al及Zn-15％A1所制备的涂层作比较。结果表明：Zn-26％A1涂层在电解质溶液中表现出更优越的防腐性能。动电位极化测试结果说明zn-Al涂层随着Al含量的增加，其耐蚀性也提高。纯Al涂层的电化学腐蚀行为与其它涂层有明显差异，其腐蚀机理类似于点蚀。
关键词:  高速电弧喷涂 Zn-Al 电化学腐蚀 动电位极化
DOI：
分类号:TG174.442
基金项目:国家自然科学基金重点项目(No.50235030);装备维修科研与改革项目(No.2003ZB06)
Electrochemical Corrosion Behavior of Arc Sprayed Zn-Al Coatings
LIU Yan 1  2  ZHU Zi-xin  CHEN Yong-xiong1  XU Bin-shi  LI Zhuo-xin2 1 1
Abstract:
Cored wires and high velocity arc spraying technique (HVAS) were applied to produce high Al content Zn-Al alloy coatings on low carbon steel substrate. The electrochemical corrosion behaviors of Zn, Al and Zn-Al coatings were studied with potentiodynamic measurement in 5 %NaCl solution. Compared with pure Zn, Al and Zn-15Al coatings, the Zn-26Al coatings showed a higher corrosion resistance in salt solution. The potentiodynamic polarization tests showed that the corrosion resistance of Zn-Al coatings increased as the Al content was raised. Pure Al coating exhibited different electrochemical behaviors compared with other coatings. The corrosion initiated at the micro-pores of the coating and the corrosion mechanism was very similar to that of the pitting corrosion.
Key words:  high velocity arc spraying,Zn-Al,electrochemical corrosion,potentiodynamic polarization
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