特集号「インフラ構造物の経年劣化に対する維持管理の最適化に向けて」
模擬淡水における炭素鋼の腐食挙動に及ぼす金属カチオンの影響
2021 年 107 巻 12 号 p. 1066-1073
詳細
2021 年 107 巻 12 号 p. 1066-1073
Effects of metal cations on the corrosion behavior of carbon steel SM490Y in 10 mM Cl‐ model fresh water were investigated by immersion tests, electrochemical tests, and surface analysis. Immersion tests and electrochemical tests results showed that Zn2+ had a significant inhibition effect on corrosion of SM490Y. The results of EDS and XPS showed that Zn2+ was incorporated in the oxide films by making a strong bond and formed zinc hydroxide or zinc oxide which can cover the surface of carbon steel. It is suggested that Zn2+ forms a protective film which can efficiently prevent break down of surface film by Cl‐ and inhibit the corrosion.
