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

doi:10.2320/matertrans.C-M2021819

Materials Chemistry

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

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2021 Volume 62 Issue 6 Pages 781-787

DOI https://doi.org/10.2320/matertrans.C-M2021819

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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.

This Paper was Originally Published in Japanese in Zairyo-to-Kankyo 69 (2020) 148–153.

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