ELECTROCHEMICAL IMPEDANCE MEASUREMENTS FOR STUDYING ANTI-CORROSION COATINGS USING PROBE CELLS

J Chin Soc Corr Pro

1992, Vol. 12

Issue (1): 63-70 DOI:

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ELECTROCHEMICAL IMPEDANCE MEASUREMENTS FOR STUDYING ANTI-CORROSION COATINGS USING PROBE CELLS

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Abstract The experimental approach for carrying out electrochemical impedance measuremerits for coated metals using probe cells is described. Equivalent circuit for the dualprobe cell is given, and the experimental impedance diagrams are discussed in terms ofcoating and interface properties and their changes during exposure to corrosive environmerits. The systems studied include alkyd coating and electrophoretic paints with or without inhibitor added. It is found that the potential difference △E_se for dual-probe cell taken each time before making impedance measurement has good correlation with the deterioration degree of the coating measured hereafter.

Received: 25 February 1992

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Wen Guomou; Cai Changshou; Liu Bihuan; Guo Jingdong; Su Fangteng (Fujian Institute of Research on the Structure of Matter; Academia Sinica) Liu Renxin; and Tian Weidong (The Second Automobile Factory). ELECTROCHEMICAL IMPEDANCE MEASUREMENTS FOR STUDYING ANTI-CORROSION COATINGS USING PROBE CELLS. J Chin Soc Corr Pro, 1992, 12(1): 63-70.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1992/V12/I1/63

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