In Situ Corrosion Monitoring of Mild Steel in a Simulated Tidal Zone without Marine Fouling Attachment by Electrochemical Impedance Spectroscopy

doi:10.1016/j.jmst.2014.03.013

J. Mater. Sci. Technol. ›› 2014, Vol. 30 ›› Issue (10): 1043-1051.DOI: 10.1016/j.jmst.2014.03.013

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In Situ Corrosion Monitoring of Mild Steel in a Simulated Tidal Zone without Marine Fouling Attachment by Electrochemical Impedance Spectroscopy

Xin Mu, Jie Wei, Junhua Dong, Wei Ke

State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences,Shenyang 110016, China

Received:2013-08-23 Online:2014-10-20 Published:2014-11-04
Contact: Prof.; Tel.: t86 24 23915912; Fax: t86 2423894149; E-mail address: jhdong@imr.ac.cn (J. Dong).

Abstract

Abstract: The corrosion behaviors of the isolated short and vertical long scale Q235B steel in a simulated tidal zone were studied by electrochemical impedance spectroscopy (EIS) monitoring and corrosion weight loss calculation in an experimental indoor simulating trough. The results show that the corrosion rate of the isolated short scale Q235B steel in the tidal zone acquired by the EIS agrees with the corrosion weight loss result. The corrosion rates of the short scale steel are in the order of middle tidal zone > the central zone between the middle tidal zone and low tidal zone > high tidal zone > low tidal zone. The fastest corrosion rate in the middle tidal zone is attributed to the longest wet time in a tidal cycle. According to the comparison of corrosion weight loss between the vertical long scale and isolated short scale specimens, the corrosion rate of vertical long scale specimens of Q235B steel is lower than that of the isolated short scale specimens in the tidal zone, but the result is contrary in the immersion zone.

Key words: Laboratory simulation, Tidal corrosion, Mild steel, Weight loss

Xin Mu, Jie Wei, Junhua Dong, Wei Ke. In Situ Corrosion Monitoring of Mild Steel in a Simulated Tidal Zone without Marine Fouling Attachment by Electrochemical Impedance Spectroscopy[J]. J. Mater. Sci. Technol., 2014, 30(10): 1043-1051.

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In Situ Corrosion Monitoring of Mild Steel in a Simulated Tidal Zone without Marine Fouling Attachment by Electrochemical Impedance Spectroscopy

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