环氧防锈漆在3种腐蚀环境中的电化学行为
Electrochemical Behaviors of Epoxy Coatings in 3 Kinds of Corrosion Environments
摘 要
采用电化学阻抗谱（EIS）技术研究了环氧防锈漆经实海浸泡试验和质量分数3.5% NaCl溶液浸泡试验、盐雾试验2种实验室模拟试验后的电化学行为，测量了涂层试样在3种腐蚀环境中0.01 Hz低频阻抗（|Z|0.01 Hz），探究了实海浸泡试验和两种实验室模拟试验的相关性。结果表明: |Z|0.01 Hz在3种试验环境中的变化趋势相同，实海浸泡试验和2种实验室模拟试验的试验结果具有很好的相关性; 3种试验环境对涂层破坏作用由小到大依次为: 3.5% NaCl溶液浸泡试验<实海浸泡试验<盐雾试验。
低频
环氧涂层
electochemical impedance spectroscopy
low frequency
epoxy coating
Abstract
Electrochemical behaviors of an epoxy coating in real sea immersion test, 3.5% (mass) NaCl solution immersion test and salt spray test were studied by electrochemical impedance spectroscopy ( EIS). Coating impedance in low frequency of 0.01 Hz (|Z|0.01 Hz) were tested in the 3 kinds of corrosion environments, and the relationships between real sea immersion test and 2 types of laboratory experiments were also analyzed. The results indicated that the trends of |Z|0.01 Hz in 3 kinds of corrosion environments were similar. The results from real sea immersion test and 2 types of laboratory experiments were correlated well, and the order of the damaging effect of the three corrosive environments on coating was as follows: 3.5% NaCl solution < seawater immersion experiment < salt spray.
中图分类号 TG174.4 DOI 10.11973/fsyfh-201612007
所属栏目 试验研究
基金项目
收稿日期 2015/7/16
修改稿日期
网络出版日期
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备注张寒露（1980-），工程师，硕士，从事材料的腐蚀与防护研究
引用该论文: ZHANG Han-lu,CAO Jing-yi,DUN Yu-chao,TANG Yu-ming,ZUO Yu. Electrochemical Behaviors of Epoxy Coatings in 3 Kinds of Corrosion Environments[J]. Corrosion & Protection, 2016, 37(12): 979
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参考文献
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【3】郝美丽,曹学军,封先河,等. 铝合金室内加速腐蚀与大气暴露腐蚀的相关性[J]. 兵器材料科学与工程,2006,29(5):28-31.
【4】王晶晶,董士刚,叶美琪,等. 环氧涂层室外暴晒和室内加速老化试验相关性研究[J]. 表面技术,2006,35(1):36-39.
【5】ZUO Y,PANG R,LI W,et al. The evaluation of coating performance by the variations of phase angles in middle and high frequency domains of EIS[J]. Corrosion Science,2008,50(12):3322-3328.
【6】张鉴清,曹楚南. 电化学阻抗谱方法研究评价有机涂层[J]. 腐蚀与防护,1998,19(3):99-104.
【7】MCINTYRE J M,PHAM H Q. Electrochemical impedance spectroscopy:a tool for organic coatings optimizations[J]. Progress in Organic Coatings,1996,27(1):201-207.
【8】DEFLORIAN F,FEDRIZZI L,ROSSI S,et al. Organic coating capacitance measurement by EIS:ideal and actual trends[J]. Electrochimica Acta,1999,44(24):4243-4249.
【9】AMIRUDIN A,THIENY D. Application of electrochemical impedance spectroscopy to study the degradation of polymer-coated metals[J]. Progress in Organic Coatings,1995,26(1):1-28.
【10】MARCHEBOIS H,KEDDAM M,SAVALL C,et al. Zinc-rich powder coatings characterisation in artificial sea water[J]. Electrochimica Acta,2004,49(11):1719-1729.
【11】XIE D,JIMING H U,TONG S,et al. Influence of zinc content and surface contamination on the electrochemical behaviors of epoxy zinc-rich primer[J]. Acta Metallurgica Sinica-Chinese Edition,2004,40(1):103-108.
【12】MAHDAVIAN M,ATTAR M M. Another approach in analysis of paint coatings with EIS measurement:Phase angle at high frequencies[J]. Corrosion Science,2006,48(12):4152-4157.
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