喷涂锌铝(ZAZA)覆盖层在海洋环境中的腐蚀
Corrosion Behavior of Sprayed Zinc-aluminum (ZAZA) Coatings in Marine Environment
摘 要
采用热喷涂工艺制备了ZAZA锌铝涂层,并对部分试样涂刷氯化橡胶面漆进行封闭处理,通过外海现场挂片、盐雾及电化学阻抗试验,研究了其防腐蚀性能及腐蚀机理,并利用扫描电镜(SEM)对涂层形貌进行了分析.结果表明,金属涂层存在孔隙或缺陷使其防护能力下降.有机涂层封闭能改善其防腐蚀效果,延长使用寿命.
锌铝涂层
腐蚀机理
thermal spraying
zinc-aluminum coating
corrosion mechanism
Abstract
The zinc-aluminum coatings were prepared by means of thermal spray,some samples were sealed with chlorinated rubber paint,and the corrosion behavior and mechanism were studied by eposure tests in sea,salt spray testing and electrochemical impedance spectroscopy (EIS).Scanning electron microscopy (SEM) was employed to assess the micromophology of the coatings.The results showed that the structure of the zinc-aluminum coatings was porous and with some defects,which would lower the protection effect.The organic coating could improve the protection effect and prolong the protection life through sealing the defects of the metal coating.
中图分类号 TG174.44
所属栏目 试验研究
基金项目 国家科技支撑计划资助(课题号:2007BAB27B01);中国科学院知识创新工程重要方向项目(No.KZCX2-YW-210)
收稿日期 2009/9/17
修改稿日期 2009/11/9
网络出版日期
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联系人作者李言涛(ytli98@163.com)
引用该论文: LI Yan-tao,JIANG Xin-de,HOU Bao-rong. Corrosion Behavior of Sprayed Zinc-aluminum (ZAZA) Coatings in Marine Environment[J]. Corrosion & Protection, 2010, 31(8): 591～594
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参考文献
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【3】Wang De-kui,Shen Cheng-jin,Jia Zhi-yong.Corrosive behavior of thermal sprayed zinc coating under asphalt concrete coat on steelbridge deck[J].Corrosion and Protection,2007,28(9):445-448.
【4】Kong Ai-min.Application study of TSA anticorrosion technology in the offshore platform[J].Total Corrosion Control,2008,22(4):32-34.
【5】夏兰廷,韦 华,黄桂桥.有色金属涂层及其封闭层的海水腐蚀性能[J].腐蚀科学与防护技术,2003,15(4):238-240.
【6】Popov B N.Using electrochemical impedance spectroscopy as a tool for organic coating solute saturation monitoring[J].Electrochemical Science,1993,140(4):947-951.
【7】Wang D W.The application of zinc thermal-spraying and its coupling coating in large-scale steel structure[J].Total Corrosion Control,2004,18(3):46-48.
【8】Vourlias G,Pistofidis N,Stergioudis G.Ability of metallic coatings to protect low carbon steels from aqueous corrosion[J].Corrosion Engineering Science and Technology,2008,43(2):163-172.
【9】Lan D Y,Wang Qiang,Xuan Zhao-Zhi.Interfacial microstructure and characterization of double-layer coatings on cast iron by arc spraying and sintering[J].Materials Science and Engineering A,2008,473:312-316.
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