EQCM STUDY ON THE FILMING KINETICS OF NEUTRAL CORROSION INHIBITORS ON IRON

J Chin Soc Corr Pro

1998, Vol. 18

Issue (4): 251-256 DOI:

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EQCM STUDY ON THE FILMING KINETICS OF NEUTRAL CORROSION INHIBITORS ON IRON

DAI Zhong-xu GAN Fu-xing WANG Di-hua YAO Lu-an (Department of Environmental Science; Wuhan University; Wuhan 430072)

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Abstract Electrochemical Quartz Crystal Microbalance(EQCM), a new electrochemical technique developed in recent years, was employed to measure the tiny mass change of surface on metal electrode in solution. According to the principle of EQCM and experimental conditions, an equation was deduced to calculate the real mass change of the electrode surface during the filming. Some experimental isothemal curves of the filming kinetics in the presence of inhibitors were obtained. It was found that the film growth on iron in Na2SO4 solution with the inhibitors followed the parabolic law for the oxidizing inhibitor (NaNO2) or linear law for the precipitating inhibitor (Na2SiO3), that was similar to oxidation kinetics of some metals at high temperature.

Key words: Electrochemical Quartz Crystal Microbalance Armco-iron Corrosion inhibitor Filming kinetics

Received: 25 August 1998

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DAI Zhong-xu GAN Fu-xing WANG Di-hua YAO Lu-an (Department of Environmental Science; Wuhan University; Wuhan 430072). EQCM STUDY ON THE FILMING KINETICS OF NEUTRAL CORROSION INHIBITORS ON IRON. J Chin Soc Corr Pro, 1998, 18(4): 251-256.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1998/V18/I4/251

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