ANODIC DESORPTION OF INHIBITORS──Ⅰ.THE PHENOMENON OF ANODIC DESORPTION OF INHIBITORS

J Chin Soc Corr Pro

1995, Vol. 15

Issue (4): 241-246 DOI:

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ANODIC DESORPTION OF INHIBITORS──Ⅰ.THE PHENOMENON OF ANODIC DESORPTION OF INHIBITORS

Wang Jia; Cao Chunan; Chen Jiajian;Zhang Mingdi; Ye Guodong;Lin Haichan(Institute of Corrosion and Protection of Metals; Chinese Academy of Sciences State Keg Laboratory for Corrosion and Protection)

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Abstract The behaviour of inhibitor desorption from iron eledrode upon anodic polarization was investigated by polarization measurements. It was found that there was a potednd plateau characterized by a rapid current rise on anodic polarization curve in the presence of inhibitor and the potedial plateau disappeared during sequent reverse potential scanning. This phenomenon was probably caused by the inhibitor desorption from iron surface as it was anodically polarized. An eledrochemical parameter-desorption potential,Edes was defined to describe the performance of inhibitor desorption, corresponding to the potential at which the desorption rate is equal to the adsorption rate for the inhibitor. The inhibitor desorption rate was dependent on the difference between desorption potential and applied potential. The more positive than Edes the applied potential was, the faster the inhibitor desorption would be.AS the applied potential was more negative than Edes, no inhibitor desorption would occur.

Key words: Inhibitor Anodic polarization Desorption

Received: 25 August 1995

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Wang Jia; Cao Chunan; Chen Jiajian;Zhang Mingdi; Ye Guodong;Lin Haichan(Institute of Corrosion and Protection of Metals; Chinese Academy of Sciences State Keg Laboratory for Corrosion and Protection). ANODIC DESORPTION OF INHIBITORS──Ⅰ.THE PHENOMENON OF ANODIC DESORPTION OF INHIBITORS. J Chin Soc Corr Pro, 1995, 15(4): 241-246.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1995/V15/I4/241

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