In Situ Observation of Preferential Anodic Dissolution of Phosphorus Compound in Fe-P Alloys Using Raman Spectroscopy
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概要
- 論文の詳細を見る
The solution chemistry of P in the Fe-P alloy electrodes containing P of 0.104, 0.028, and 0.004 mass% has been investigated by using in situ Raman spectroscopy in an electrochemical cell under controlled potential in 0.1 kmol·m-3 NaOH at 25°C. It is found that the segregation site of the precipitate with the chemical composition of F3P dissolves preferentially. Using in situ Raman spectroscopy three dissolution species of PO<SUB>4</SUB><SUP>3-</SUP>, HPO<SUB>4</SUB><SUP>2-</SUP>, and H2PO<SUB>4</SUB><SUP>-</SUP> were detected on the surface at the segregation site, and these concentrations depend on the location of the precipitate of P compound whether at grain boundary or in grain. The detection of HPO<SUB>4</SUB><SUP>2-</SUP> and H2PO<SUB>4</SUB><SUP>-</SUP> both of which are unstable in the solution of NaOH suggests that the localized corrosion at the segregation site of P induces decrease of pH.
- 社団法人 日本鉄鋼協会の論文
- 1997-03-15
著者
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MISAWA Toshihei
Department of Materials Science and Engineering, Muroran Institute of Technology
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KOBAYASHI Noriaki
Department of Applied Biochemistory, Utsunomiya University
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Tanabe Hiroyoshi
Department Of Applied Chemistry Muroran Institute Of Technology
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SHIBUYA Teruo
Department of Materials Science and Engineering, Muroran Institute of Technology
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Shibuya Teruo
Department Of Materials Science And Engineering Muroran Institute Of Technology
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Kobayashi Noriaki
Department Of Applied Biochemistory Utsunomiya University
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Kobayashi Noriaki
Department Of Materials Science And Engineering Muroran Institute Of Technology
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Misawa Toshihei
Department Of Materials Science And Engineering Faculty Of Engineering Muroran Institute Of Technolo
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