Modeling the Dynamics of the Local Chromium-Nickel Steel Dissolution Process

Analytical and simulation models of pitting corrosion on chromium-nickel steels under galvanostatic and potentiostatic polarization conditions are proposed. Under conditions of galvanostatic polarization three modes of local metal dissolution have been found. The labeled state graph which shows the...

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Bibliographic Details
Published in:Journal of physics. Conference series 2020-01, Vol.1443 (1), p.12017
Main Authors: Tazieva, R F, Vinogradova, S S
Format: Article
Language:English
Subjects:
Dissolution
Nickel chromium steels
Nickel steels
Physics
Pitting (corrosion)
Polarization
Stochastic models
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Summary:Analytical and simulation models of pitting corrosion on chromium-nickel steels under galvanostatic and potentiostatic polarization conditions are proposed. Under conditions of galvanostatic polarization three modes of local metal dissolution have been found. The labeled state graph which shows the transitions of a system from one dissolution mode to another has been offered. The values of stable pit formation time have been calculated. The additional model parameter «fraction of the pits being passivated» applied to establish the correlation between pit initiation and pit passivation rates in a stochastic model is proposed. It explains the variable dependence of a polarization potential on a pit repassivation rate.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1443/1/012017