Perturbation method analysis of AC-induced corrosion

A nonlinear model for corrosion of metals subjected to alternating voltage (AV) induced corrosion that includes the elements corresponding to the polarization resistance, the double layer capacitance and the solution resistance is developed. The results show that corrosion of materials under AC cond...

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Bibliographic Details
Published in:Corrosion science 2008-06, Vol.50 (6), p.1664-1671
Main Authors: Zhang, Rong, Vairavanathan, Pon Rajesh, Lalvani, Shashi B.
Format: Article
Language:English
Subjects:
AC corrosion
AC frequency
Applied sciences
AV corrosion
Corrosion
Corrosion environments
Exact sciences and technology
Metal dissolution
Metals. Metallurgy
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Summary:A nonlinear model for corrosion of metals subjected to alternating voltage (AV) induced corrosion that includes the elements corresponding to the polarization resistance, the double layer capacitance and the solution resistance is developed. The results show that corrosion of materials under AC conditions is greatly enhanced by the peak potential and by an increase in the ratio of the anodic-to-cathodic Tafel slope. The AC-induced corrosion rate: (i) decreases with the frequency of the applied signal and with an increase in the DC corrosion potential, (ii) is independent of the DC corrosion rate, and (iii) increases with the peak potentials of the AV signal.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2008.02.018