NEW NUMERICAL METHODS FOR ESTIMATING THE ELECTROCHEMICAL KINETICS PARAMETERS OF CORROSION PROCESS USING WEAK POLARIZATION CURVE

J Chin Soc Corr Pro

1997, Vol. 17

Issue (3): 227-232 DOI:

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NEW NUMERICAL METHODS FOR ESTIMATING THE ELECTROCHEMICAL KINETICS PARAMETERS OF CORROSION PROCESS USING WEAK POLARIZATION CURVE

ZHANG Hongbin HUANG Yongchang (Department of Applied Chemistry; Shanghai Jiao Tong University)

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Abstract Gauss-Newton method was used to estimate the values of electrochemical kinetics parameters by fitting the weak polarization curve of the corroding metal. In this paper, two new computation programs based on optimum step Gauss-Newton method and Levenberg-Marquardt method were proposed to speed up the fitting convergency and relax the requirements for initial values. The fitting results computed by the two improved methods were in good agreement,which indicated that both methods were applicable to the three and four parameters polarization curve equations.

Key words: Weak polarization curve Electrochemiacal kinetics parameter Gauss-Newton method Levenberg-Marquardt method

Received: 25 June 1997

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ZHANG Hongbin HUANG Yongchang (Department of Applied Chemistry; Shanghai Jiao Tong University). NEW NUMERICAL METHODS FOR ESTIMATING THE ELECTROCHEMICAL KINETICS PARAMETERS OF CORROSION PROCESS USING WEAK POLARIZATION CURVE. J Chin Soc Corr Pro, 1997, 17(3): 227-232.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1997/V17/I3/227

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