Abstract

A new mathematical model, recently developed for the numerical simulation of the incubation period of crevice corrosion, has been applied to a study of the effect of the crevice gap profile. Use of the crevice surface profile in the modelling of the ionic migration and diffusion processes leads to a much more realistic simulation of the crevice corrosion process. The crevice gap profile is demonstrated to be critical in the process of crevice corrosion. While the rest of the crevice remains completely passive, narrow micro-crevices within the overall crevice can achieve active corrosion, whether they are found at the tip, middle or mouth of the crevice.

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