ANODIC DESORPTION OF INHIBITORS──Ⅱ. EFFECTS OF INHIBITOR DESORPTION ON ELECTRODE IMPEDANCE

J Chin Soc Corr Pro

1995, Vol. 15

Issue (4): 247-253 DOI:

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ANODIC DESORPTION OF INHIBITORS──Ⅱ. EFFECTS OF INHIBITOR DESORPTION ON ELECTRODE IMPEDANCE

Wang Jie; Cao Chunan(Corrosion Science Labratory; Institute of Corrosion and Protection of Metals; Chinese Academy of Sciences)

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Abstract The effects of inhibitor desorption on electrochemical impedance spectra and interfacial electrochemical parameters were studied using A. C. impedance measurements. It was found that on the complex plan diagram the characteristics of inhibitor desorption showed the appearance of an inductive loop as the applied potential approached the desorption potential Edes. The double layer capacitance was kept unchanged in the range of potentials lower than the desorption potential, and increased rapidly as the potential reached the desorption potential. The charge transfer resistance decreased gradually with increasing potential, and reached a relatively small value at the Edes. At the same time, however, the dispersion coefficient continuously increased. Based on the consideration of inhibitor desorption, the above mentioned results were discussed.

Key words: Inhibitors Desorption Desorption potential Electrochemical Impedance Spectra Double layer capacitance

Received: 25 August 1995

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Wang Jie; Cao Chunan(Corrosion Science Labratory; Institute of Corrosion and Protection of Metals; Chinese Academy of Sciences). ANODIC DESORPTION OF INHIBITORS──Ⅱ. EFFECTS OF INHIBITOR DESORPTION ON ELECTRODE IMPEDANCE. J Chin Soc Corr Pro, 1995, 15(4): 247-253.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1995/V15/I4/247

1王佳,曹楚南,陈家坚．腐蚀科学与防护技术,1990,4(2):792王佳,曹楚南等．中国腐蚀与防护学报,1995,15(4):2413王佳,施存余等．中国腐蚀与防护学报,1989,9(1);114AmstrongRD,FirmanRE,ThirskHR．FaradnyDisc．ofTheChemicalSoc．1974,56:2445CaoChunan,Electrochim．Acta,1990,35(5):8316CaoChunan,Electrochim．Acta,1990,35(5):8377NisanciougluK,NewmanJ．J．Electrochem．Soc,1973,120:1339

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