电化学方法研究锈层覆盖下碳钢的腐蚀规律

中国腐蚀与防护学报

2011, Vol. 31

Issue (2): 91-96

研究报告

本期目录 | 过刊浏览

电化学方法研究锈层覆盖下碳钢的腐蚀规律

邹妍¹,王佳^1,2,郑莹莹¹

1. 中国海洋大学化学化工学院青岛 266100
2. 中国科学院金属研究所金属腐蚀与防护国家重点实验室沈阳 110016

ELECTROCHEMICAL STUDY ON CORROSION OF RUSTED CARBON STEEL

ZOU Yan¹, WANG Jia^1,2, ZHENG Yingying¹

1. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100
2. State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016

全文: PDF(2345 KB)

摘要: 分别采用失重法与电化学方法(包括极化曲线、线性极化法和电化学阻抗技术)研究了碳钢在海水中浸泡48周的腐蚀规律。结果发现，短期浸泡在海水中的碳钢，表面生成的腐蚀产物薄且疏松，长期浸泡后，锈层逐渐分为两层：外锈层薄且疏松，内锈层厚且致密。短期浸泡，失重法与电化学方法得到的腐蚀规律一致，腐蚀速度逐渐减小并且数值相近，此时电化学方法可以用来准确的估算碳钢的腐蚀速度。长期浸泡，电化学方法测定的腐蚀速度转为逐渐增大，偏离了失重结果，并且锈层越厚偏差越大，此时电化学方法会过高估算腐蚀速度。

关键词 ：碳钢, 海水, 腐蚀形貌, 复杂体系, 偏差

Abstract：Mass loss measurement and various electrochemical methods, including polarization curves, linear polarization resistance measurement (LPR) and electrochemical impedance spectra technique (EIS) were employed to evaluate the corrosion of rusted carbon steel immersed in seawater for 48 weeks. Results indicated that the initial corrosion product formed on the carbon steel was thin and loose. With prolonged immersion, the rust layer could be divided into two layers: the outer layer was thin and loose, while the inner layer was thick and compact. The corrosion rates calculated by electrochemistry measurement, were consistent with the mass loss. The electrochemical methods could be used to accurately estimate corrosion rate at initial period of immersion. After long-term immersion, the electrochemical corrosion rate turned to increase and deviated from mass loss gradually.

Key words： carbon steel seawater corrosion morphology complex system deviation

收稿日期: 2010-03-05

ZTFLH:

TG174.36

基金资助:

国家自然科学基金项目(50971118)资助

通讯作者: 王佳 E-mail: jwang@ouc.edu.cn

Corresponding author: Jia WANG E-mail: jwang@ouc.edu.cn

作者简介: 邹妍，女，1980年生，博士生，研究方向为金属腐蚀与防护

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引用本文:

邹妍,王佳,郑莹莹. 电化学方法研究锈层覆盖下碳钢的腐蚀规律[J]. 中国腐蚀与防护学报, 2011, 31(2): 91-96.
ZOU Yan, ZHENG Ying-Ying, YU Jia. ELECTROCHEMICAL STUDY ON CORROSION OF RUSTED CARBON STEEL. J Chin Soc Corr Pro, 2011, 31(2): 91-96.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2011/V31/I2/91

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