Improvement of Corrosion Resistance of Steels by controlling catalytic activity

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H05550
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Material processing/Microstructural control engineering
• Research Institution: Tohoku University
• Principal Investigator: SUGAWARA YU 東北大学, 工学研究科, 助教 (40599057)
• Research Collaborator: FURUTA Masahiro ; AOYAMA Takahito ; KUDO Tomohiro
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: ステンレス鋼 / 酸素還元反応 / 水素発生反応 / 活性溶解 / 不働態皮膜

Outline of Final Research Achievements

We tried to stop the growth of localized corrosions for steels by controlling the oxygen reduction reaction, the hydrogen evolution reaction, and the solution chemistry on the steel surface. No effect of the additive elements such as Al and Ni on the oxygen reduction reaction and the hydrogen evolution reaction for Fe-18Cr alloy was shown. A nitrogen compound layer formed on a surface of iron specimen was possible to inhibit the hydrogen evolution reaction. In acidic solutions, sulfate ions suppressed the anodic dissolution of steel matrix for Type 316L stainless steel. Based on the result, we succeeded the inhibition of the growth of crevice corrosion for Type 316L stainless steel by the addition of sulfate ion.

Free Research Field

材料電子化学