核电站钢制安全壳无机锌涂层的大气腐蚀行为
Atmospheric Corrosion Behavior of Inorganic Zinc Coating for Containment Vessel of Nuclear Power Plant
摘 要
通过盐雾加速腐蚀试验和电化学测试，对比分析了核电站钢制安全壳用无机锌（IOZ）涂层与热喷锌（TSZ）涂层的耐蚀性进行研究。结果表明：与TSZ涂层相比，IOZ涂层在经过不同时间盐雾加速腐蚀后，涂层缺陷及其表面附着的盐斑均较少，涂层结构致密且腐蚀速率较低；两种涂层的腐蚀产物均以Zn5（OH）8Cl2H2O为主；随着腐蚀时间的延长，IOZ涂层的阻抗增大，表明其不仅具有阴极保护性能和屏蔽性能，耐蚀性也更加优异和持久。
无机锌
腐蚀
核电站
安全壳
coating
inorganic zinc coating
corrosion
nuclear power plant
containment vessel
Abstract
Through salt spray accelerated corrosion test and electrochemical test, the corrosion resistance of inorganic zinc (IOZ) coating used for containment vessel of nuclear power plant and thermal spraying zinc (TSZ) coating was analyzed. The results showed that compared with the TSZ coating, the IOZ coating had fewer defects and salt spots attached to the surface after salt spray accelerated corrosion at different periods of time, the coating structure was dense and the corrosion rate was lower. The corrosion products of two coatings were mainly Zn5(OH)8Cl2H2O. As the corrosion time increased, the resistance of IOZ coating increased, indicating that it not only had cathodic protection and shielding properties, but also had more excellent and lasting corrosion resistance.
中图分类号 TG174 DOI 10.11973/fsyfh-202109006
所属栏目 试验研究
基金项目 国家科技重大专项（2019ZX06004-002）
收稿日期 2021/5/1
修改稿日期
网络出版日期
作者单位点击查看
引用该论文: LIU Xiaoqiang,BAO Yichen,MENG Fanjiang,CHEN Xudong,WU Quan. Atmospheric Corrosion Behavior of Inorganic Zinc Coating for Containment Vessel of Nuclear Power Plant[J]. Corrosion & Protection, 2021, 42(9): 28
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【8】周郁文. 聚硅酸乙酯的改性及其应用的研究[J]. 涂料工业,2001,31(12):14-17.
【9】王绍明,萧以德,张三平. 锌及锌覆盖层户外大气暴露腐蚀行为的研究[J]. 材料保护,2004,37(11):24-26,66.
【10】王振尧. 锌在NaCl盐雾中的腐蚀规律[J]. 全面腐蚀控制,1995,9(2):42-44.
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【12】ANGEL E D,VERA R,CORVO F. Atmospheric corrosion of galvanised steel in different environments in Chile and Mexico[J]. International Journal of Electrochemical Science,2015,10(10):7985-8004.
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【15】夏兰. 金属材料的海洋腐蚀与防护[M].[出版地不详]:冶金工业出版社,2003.
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