[1J09-12] Corrosion, Electrochemistry, Radiolysis 2

[1J09] Evaluation of the Effect of Harmless Anion Addition on the Rate of Chloride Ion Emission from the Crevice

*Kazuma Kitamoto¹, Kazuki Yakata¹, Yutaka Watanabe¹, Hideo Okada² (1. Tohoku Univ., 2. Chubu Electric Power)

Keywords:Stainless steel, Crevice corrosion, Anticorrosion engineering, Improvement of water quality in crevices, Diffusion and migration

"Chemical pumping operation" using harmless anions (MoO₄^2- , WO₄^2-, etc.) is proposed as a practical crevice environment purification method to prevent crevice corrosion.
In this presentation, the enhancement of Cl^- emission from the crevice, one of the effects of this method, was evaluated experimentally and numerically. The results showed that the Cl^- emission rate was greater than that of diluting the crevice environment using only pure water.