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Introduction of Cu$$^{2+}$$ to the inside of the crevice by chelation and its effect on crevice corrosion of Type 316L stainless steel

Aoyama, Takahito   ; Kato, Chiaki   

The chelated complex of Cu$$^{2+}$$: [Cu(EDTA)]$$^{2-}$$ was used to introduce Cu$$^{2+}$$ from outside to the inside of crevice. The introduced Cu$$^{2+}$$ was expected to act as an inhibitor for the crevice corrosion on stainless steels. Crevice corrosion tests, confirmed the introduction of Cu$$^{2+}$$ to the inside of the crevice via electromigration of [Cu(EDTA)]$$^{2-}$$ was confirmed. Migrated [Cu(EDTA)]$$^{2-}$$ reacted with H$$^{+}$$ and inhibited decrease in pH inside the crevice, where Cu$$^{2+}$$ was separated from [Cu(EDTA)]$$^{2-}$$ and suppressed active dissolution of the stainless steel.

Language

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English

Journal

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Corrosion Science

Volume

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210

Number

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2

Pages

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p.110850_1 - 110850_10

Publication Year/Month

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2023/01

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Patent information

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Paper URL

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https://doi.org/10.1016/j.corsci.2022.110850

DOI for research data

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Keywords

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Stainless Steel; Crevice Corrosion

Research Facility

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Press Release

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Article of JAEA R&D Review

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- Accesses

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Category:Materials Science, Multidisciplinary

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