書誌事項
- タイトル別名
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- Effect of W on Corrosion Behavior of Low Alloy Steel in Wet/dry Environment
- カンシツ クリカエシ カンキョウ ニ オケル テイゴウキン コウ ノ フショク キョドウ ニ アタエル タングステン ノ エイキョウ
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The chemical state of the tungsten (W) in the rust of low alloy steel was analyzed by EPMA and XPS, and the electrochemical behavior of rust was investigated by alternating current (AC) impedance method after wet/dry cyclic corrosion test with chlorides. The 1.0mass%W-bearing steel showed higher corrosion resistance than carbon steel in the corrosion test. EPMA and XPS showed that the tungsten existed as WO4 compounds in the rust of W-bearing steel. A Fe-W binary potential-pH diagram was made to investigate the thermodynamic stability of Fe-W oxides, and this showed that WO4 was stable in the rust, which confirmed the physical analysis. An AC impedance measurement was made to obtain the corrosion reaction resistance (Rt) of the rust, and it was found that Rt of W-bearing steel was much larger than that of carbon steel. The corrosion of the W-bearing steel is suppressed by (1) the insoluble FeWO4 formed near the base metal suppressing the anodic reaction, (2) the WO42- ions in the rust changing the selective permeability to prevent the transport of Cl- ions.
収録刊行物
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- Zairyo‐to‐Kankyo
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Zairyo‐to‐Kankyo 49 (12), 734-738, 2000
公益社団法人 腐食防食学会
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詳細情報
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- CRID
- 1390282681236374400
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- NII論文ID
- 130004085731
- 10005141146
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- NII書誌ID
- AN10235427
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- COI
- 1:CAS:528:DC%2BD3MXhs1Kjsg%3D%3D
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- ISSN
- 18819664
- 09170480
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- NDL書誌ID
- 5600689
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- データソース種別
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- JaLC
- NDL
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- 使用不可