種々の水溶液で濡らして研磨したステンレス鋼の耐食性
1994 年 43 巻 2 号 p. 89-92
詳細
1994 年 43 巻 2 号 p. 89-92
Investigation has been made on the corrosion resistance of stainless steels which were polished with coated abrasive papers wetted by various kinds of solutions. Atmospheric exposure tests, salt spray tests, and pitting potential measurements were carried out, and it was discovered that the rust resistances of SUS 430 and SUS 430 LX polished together with Na2S solution were much degraded. It was assumed that the deterioration of the rust resistance was due to sulfides on the polished surface which were detected by XPS and were inferred to be formed by tribochemical reaction during the process of polishing. SUS 304 was deteriorated much less than SUS 430 or SUS 430 LX. Na2S2O3, NaSCN and Na2SO3 deteriorated the rust resistance to less degree than Na2S, while Na2SO4, NaCl and NaF did not. Sulfide formation reactions were discussed based on measured potentials of the specimens which were being polished, and pH values of the polishing solutions.
