ELECTROCHEMICAL STUDY ON CORROSION OF RUSTED CARBON STEEL

J Chin Soc Corr Pro

2011, Vol. 31

Issue (2): 91-96 DOI:

Research Articles

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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

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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

Received: 05 March 2010

ZTFLH:

TG174.36

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

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Cite this article:

ZOU Yan, WANG Jia, ZHENG Yingying. ELECTROCHEMICAL STUDY ON CORROSION OF RUSTED CARBON STEEL. J Chin Soc Corr Pro, 2011, 31(2): 91-96.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2011/V31/I2/91

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