交流阻抗技术测定碳钢上有机涂层的防蚀性能

中国腐蚀与防护学报, 1990, 10(1): 59-65.

交流阻抗技术测定碳钢上有机涂层的防蚀性能

中国科学院腐蚀科学开放研究实验室

中科院福建物质结构研究所二部

基金项目: 国家自然科学基金

ELECTROCHEMICAL IMPEDANCE TESTS FOR PROTECTIVE COATINGS ON MILD STEEL

Guo lingdong Wen Guomou Liu Bihuan Cai Changshou Su Fangfeng (Corrosion Science Laboratory Academia Sinica) , null , null , null , null

用交流阻抗技术在宽频率范围(0.01Hz-65kHz)内测定了六种有机涂层/碳钢在3%氯化钠溶液中的频谱图。用不同的等效电路解释了不同涂层体系的频谱行为,讨论了不同涂层的保护性能并分析了层下金属的腐蚀过程。

AC impedance techniques in a broad frequency range(0.01Hz-65kHz) are applied to some organic coatings on mild steel in 3% sodium chloride solution.The coatings studied include commercial emulsion paint,primers and electrophoretic ones.Models for the impedance behavior have been developed for different coating systems,and methods for the analysis of experimental impedance diagrams in terms of coating and interface properties and their changes during exposure to corrosive environments are discussed,and an assessment of the behavior of these coatings is made in the light of the analysis.

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