書誌事項
- タイトル別名
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- An Anticorrosion Mechanism of Silica Particles in Chromate Coatings.
- クロメート ヒマクチュウ ニ オケル シリカ リュウシ ノ ボウショク サヨウ
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The adsorption-desorption behavior of Cr (VI) ions on the surfaces of fine silica particles was examined by atomic absorption spectrometry and by electric conductivity measurement of solutions so as to analyze an anticorrosion function of silica particles in dry-in-place chromate coatings.<br>Among chromium species, Cr (VI) ion shows high rate of adsorption due to coordination bonds formed with the Si atoms of silica particles. In an aqueous solution of less than pH5.5, Cr (VI) ions are adsorbed on the surfaces of silica particles. At pH8.5-11, desorption of already-adsorbed Cr (VI) ions occurs through a reaction that is mainly SN1D ligand substitution of OH- and Cr (VI) ions.<br>An anticorrosion mechanism of silica particles in dry-in-place chromate coatings was surmised to be as follows. In acidic regions, where metal is corroded, Cr (VI) ions in the chromate coating are adsorbed and fixed on the silica particles. In basic regions, Cr (VI) ions that were previously adsorbed are desorbed through the substitution reaction. These desorbed Cr (VI) ions contribute to the corrosion resistance of metal substrates as an inhibitor.
収録刊行物
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- 表面技術
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表面技術 47 (2), 183-188, 1996
一般社団法人 表面技術協会
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詳細情報 詳細情報について
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- CRID
- 1390001204115641856
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- NII論文ID
- 10002255779
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- NII書誌ID
- AN1005202X
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- COI
- 1:CAS:528:DyaK28Xht1KrsLs%3D
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- ISSN
- 18843409
- 09151869
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- NDL書誌ID
- 3926768
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
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- 抄録ライセンスフラグ
- 使用不可