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Report No.

Three-dimensional computational modeling and simulation of intergranular corrosion propagation of stainless steel

Igarashi, Takahiro ; Komatsu, Atsushi ; Motooka, Takafumi*; Ueno, Fumiyoshi  ; Yamamoto, Masahiro 

We constructed three dimensional computational model using cellular automata method to simulate the intergranular corrosion propagation of stainless steel. In the model, the computational system was constructed by three types of cells: grain (bulk), grain boundary (GB), and solution cell. Our simulations revealed that the surface roughness calculated by the model adopted distributed dissolution rates of GBs was greater than that adopted constant dissolution rates of GBs. The cross-sectional images obtained by our simulation were comparable with that obtained by corrosion tests. These results indicate that the surface roughness during corrosion relates the distribution of corrosion rate.



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