Effect of Sub-cracks Inside Crevice on the Crevice Corrosion in the Initiation Stage

초록

Recently, there are two branches of most important initiation theory of crevice corrosion. One is the theory mainly based on the chemical changes in the crevice solution and the other is the drop(IR drop) in the characteristic crevice geometry. In the model of this study, a micro-crack (or sub-crack) is introduced to crevice geometry that likely comes from the production process of materials or applying period in the field of it in the form of surface flaws, pitting pores etc. The model is established in 4-component stainless steels(316L) considering above two theories.