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材料工程  2018, Vol. 46 Issue (3): 91-97    DOI: 10.11868/j.issn.1001-4381.2016.001024
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
Zn-Al-Mg-RE涂层在含SRB海水中的耐腐蚀性与机理
龙伟漾, 吴玉萍, 高文文, 洪晟
河海大学 力学与材料学院, 南京 211100
Corrosion Resistance Behavior and Mechanism of Zn-Al-Mg-RE Coating in Seawater with SRB
LONG Wei-yang, WU Yu-ping, GAO Wen-wen, HONG Sheng
College of Mechanics and Materials, Hohai University, Nanjing 211100, China
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摘要 利用高速电弧喷涂技术在Q235钢基体上制备Zn-Al-Mg-RE涂层,采用环氧改性有机硅树脂对涂层进行封孔,在含硫酸盐还原菌(SRB)海水中浸泡后,采用EIS,PC等方法研究Zn-Al-Mg-RE涂层在SRB一个生长周期内的腐蚀行为,并对涂层进行表面微观形貌和化学成分分析,探讨其腐蚀机理。结果表明:封孔和未封孔的Zn-Al-Mg-RE涂层在含SRB海水中的腐蚀速率均呈先增大后减小的趋势;封孔后Zn-Al-Mg-RE涂层的耐腐蚀性得到较大提高。经过浸泡后的Zn-Al-Mg-RE涂层表面覆盖了一层微生物和腐蚀产物组成的混合物层和钝化膜层,避免了涂层进一步遭受损坏。
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龙伟漾
吴玉萍
高文文
洪晟
关键词 硫酸盐还原菌电弧喷涂环氧改性有机硅树脂封孔腐蚀Zn-Al-Mg-RE涂层    
Abstract:The corrosion behavior of Zn-Al-Mg-RE sealed and unsealed coatings fabricated by high-velocity arc spraying on Q235 steel was studied in seawater with sulfate-reducing bacteria (SRB) using electrochemical impedance spectroscopy(EIS), polarization curve(PC), scanning electron microscopy (SEM) and energy dispersive spectroscopy(EDS). The results show that the corrosion rate of unsealed and sealed Zn-Al-Mg-RE coatings first increases and then decreases; the corrosion resistance of Zn-Al-Mg-RE coating apparently improves by the sealing treatment. After immersion, the two coatings surface is covered by a passivation film layer of microorganism and corrosion products, which avoids the coating from being further damaged.
Key wordssulfate-reducing bacteria    arc spraying    epoxy modified organic silicone resin sealing    corrosion    Zn-Al-Mg-RE coating
收稿日期: 2016-08-29      出版日期: 2018-03-20
中图分类号:  TG174.44  
基金资助: 
通讯作者: 吴玉萍(1964-),女,教授,博士,博士生导师,从事金属材料及表面工程方面的研究工作,联系地址:江苏省南京市江宁区佛城西路8号河海大学江宁校区(211100),E-mail:wuyphhu@163.com     E-mail: wuyphhu@163.com
引用本文:   
龙伟漾, 吴玉萍, 高文文, 洪晟. Zn-Al-Mg-RE涂层在含SRB海水中的耐腐蚀性与机理[J]. 材料工程, 2018, 46(3): 91-97.
LONG Wei-yang, WU Yu-ping, GAO Wen-wen, HONG Sheng. Corrosion Resistance Behavior and Mechanism of Zn-Al-Mg-RE Coating in Seawater with SRB. Journal of Materials Engineering, 2018, 46(3): 91-97.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.001024      或      http://jme.biam.ac.cn/CN/Y2018/V46/I3/91
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