[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.14773/cst.2017.16.2.64

Numerical Simulation of Interactions between Corrosion Pits on Stainless Steel under Loading Conditions

Wang, Haitao (Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences)
Han, En-Hou (Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences)

Publication Information

Corrosion Science and Technology / v.16, no.2, 2017 , pp. 64-68 More about this Journal

Abstract

The interactions between corrosion pits on stainless steel under loading conditions are studied by using a cellular automata model coupled with finite element method at a mesoscopic scale. The cellular automata model focuses on a metal/film/electrolyte system, including anodic dissolution, passivation, diffusion of hydrogen ions and salt film hydrolysis. The Chopard block algorithm is used to improve the diffusion simulation efficiency. The finite element method is used to calculate the stress concentration on the pit surface during pit growth, and the effect of local stress and strain on anodic current is obtained by using the Gutman model, which is used as the boundary conditions of the cellular automata model. The transient current characteristics of the interactions between corrosion pits under different simulation factors including the breakdown of the passive film at the pit mouth and the diffusion of hydrogen ions are analyzed. The analysis of the pit stability product shows that the simulation results are close to the experimental conclusions.

Keywords

pitting corrosion; loading; cellular automata; finite element method;

Citations & Related Records

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