| 模数对水性硅酸钾富锌涂层电化学行为的影响 |
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| 引用本文： | 王石青,何德良,丁庆云,徐以兵,高娟,区永康. 模数对水性硅酸钾富锌涂层电化学行为的影响[J]. 中国腐蚀与防护学报, 2008, 28(6) |
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| 作者姓名： | 王石青 何德良 丁庆云 徐以兵 高娟 区永康 |
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| 作者单位： | 1. 湖南大学化学化工学院,长沙,410082
2. 长沙市环境监测中心站,长沙,410001 |
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| 摘 要： | 通过测量涂层腐蚀电位与涂层电化学交流阻抗,研究了水溶性K2SiO3溶液的模数(SiO2/K2O摩尔比)对水性无机富锌涂层电化学行为的影响.结果表明,水性无机富锌涂料随着水基模数的增加,涂层腐蚀电位增高,涂层对腐蚀介质的屏蔽性能增强,涂层中锌粉颗粒的活性溶解阻力增大.用扫描电子显微镜(SEM)观测不同模数水性无机富锌涂层的结构表明,水性无机富锌涂料水基模数的增加使涂层中锌粉颗粒之间充分交联,涂膜强度增大,涂层中锌粉颗粒之间的缝隙减小,涂层的致密性增强.
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| 关 键 词： | 模数 水性无机富锌涂料 硅酸钾 电化学行为 电化学阻抗谱 |
INFLUENCE OF THE MOLAR RATIO ON THE ELECTROCHEMICAL BEHAVIOR OF WATERBORNE POTASSIUM SILICATE ZINC-RICH COATING |
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| WANG Shiqing,HE Deliang,DING Qingyun,XU Yibing,GAO Juan,GOU Yongkang. INFLUENCE OF THE MOLAR RATIO ON THE ELECTROCHEMICAL BEHAVIOR OF WATERBORNE POTASSIUM SILICATE ZINC-RICH COATING[J]. Journal of Chinese Society For Corrosion and Protection, 2008, 28(6) |
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| Authors: | WANG Shiqing HE Deliang DING Qingyun XU Yibing GAO Juan GOU Yongkang |
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| Affiliation: | WANG Shiqing1,HE Deliang1,DING Qingyun2,XU Yibing1,GAO Juan1,OU Yongkang1(1.College of Chemistry , Chemical Engineering,Hunan University,Changsha 410082,2.Environmental Monitoring Center of Changsha,Changsha 410001) |
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| Abstract: | The influence of the molar ratio(SiO2/K2O molar ratio) of potassium silicate solution on the electrochemical behavior of waterborne zinc-rich coating were studied by monitoring the variation of the corrosion potential(Ecorr) of the coatings and the electrochemical impedance spectroscopy(EIS) . With the promotion of SiO2/K2O molar ratio,the results showed that the shield effect of impenetration of corrosion medium to substrate was enhanced and the dissolution resistance of zinc particles in the coatings was ... |
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| Keywords: | molar ratio waterborne inorganic zinc-rich coatings potassium silicate electrochemical behavior electrochemical impedance spectroscopy |
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