带锈层碳钢在3% NaCl溶液中的腐蚀电化学行为

吴善宏; 肖丽; 尹力; 胡家元

带锈层碳钢在3% NaCl溶液中的腐蚀电化学行为

1.
浙江浙能乐清发电有限公司,温州 325609
2.
武汉大学动力与机械学院,武汉 430072

详细信息

作者简介:
胡家元,教授,

中图分类号: TG174; O646
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出版历程
- 收稿日期: 2012-09-22
- 刊出日期: 2013-09-14

Electrochemical Corrosion Behavior of Carbon Steel Covered by Rust Layer in 3% NaCl Solution

摘要

摘要: 采用失重法、红外光谱、电化学阻抗谱等方法研究了碳钢在3% NaCl溶液中的腐蚀行为。结果表明,锈层会显著影响碳钢的腐蚀过程。锈层由γ-FeOOH及Fe3O4构成; 其中γ-FeOOH易被还原而起氧化剂作用,Fe3O4层起大阴极作用,氧可直接在锈层表面还原。锈层不仅不能阻碍碳钢腐蚀过程,而且将加速其腐蚀,最终碳钢腐蚀速率由溶液中的氧极限扩散速率所决定。
- 碳钢 /
- 3% NaCl溶液 /
- 锈层 /
- 腐蚀行为
Abstract: The corrosion behavior of carbon steel in 3% NaCl solution was studied by weight-loss method, infrared spectroscopy (IR) and electrochemical impedance spectroscopy(EIS). The results indicate that the corrosion process of carbon steel is affected by rust layer significantly. The rust layer is composed of γ-FeOOH and Fe3O4. γ-FeOOH can be reduced easily and work as oxidant. The Fe3O4 layer provides a large cathodic area and oxygen can be reduced on the surface of rust layer. As a result, the rust layer can not prevent the corrosion of carbon steel and even can accelerate the corrosion process. The corrosion rate of carbon steel is determined by the limiting diffusion rate of oxygen.
- carbon steel /
- 3% NaCl solution /
- rust layer /
- corrosion behavior

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参考文献(14)

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带锈层碳钢在3% NaCl溶液中的腐蚀电化学行为

作者简介: 胡家元,教授,

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出版历程

Electrochemical Corrosion Behavior of Carbon Steel Covered by Rust Layer in 3% NaCl Solution

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出版历程

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作者简介:
胡家元,教授,