塩化物を含む硫酸ミスト環境においてNiSO4含有樹脂被覆炭素鋼に形成した腐食生成物の構造

林田 将汰; 高橋 正充; 出口 博史; 土谷 博昭; 花木 宏修; 山下 正人; 藤本 慎司

doi:10.3323/jcorr.69.148

Research Paper

Structure of Corrosion Product Formed on Carbon Steel Covered with NiSO₄-added Resin Coating under Sulfuric Acid Mist Environment Containing Chloride

Shota Hayashida, Masamitsu Takahashi, Hiroshi Deguchi, Hiroaki Tsuchiya, Koushu Hanaki, Masato Yamashita, Shinji Fujimoto

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Keywords: sulfuric acid mist, carbon steel, metallic salt, corrosion product, goethite, akaganeite, magnetite

JOURNAL FREE ACCESS

2020 Volume 69 Issue 5 Pages 148-153

DOI https://doi.org/10.3323/jcorr.69.148

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Abstract

Corrosion resistance of carbon steel covered with resin coating containing nickel sulfate has been evaluated under chloride and sulfuric acid mist environment. The structure of corrosion products formed on steel surface was investigated by XRD and XAFS analyses using synchrotron radiation. Nickel sulfate promoted the formation of goethite and akaganeite. It was considered that this akaganeite was not tetragonal β-FeOOH but monoclinic akaganeite containing nickel.

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