THE STUDY OF INHIBITIVE MECHANISM OF CORROSION INHIBITORS FOR CARBON STEEL IN NATURAL SEAWATER

J Chin Soc Corr Pro

2005, Vol. 25

Issue (4): 205-208 DOI:

Research Report

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THE STUDY OF INHIBITIVE MECHANISM OF CORROSION INHIBITORS FOR CARBON STEEL IN NATURAL SEAWATER

Zhenjun Ju;Min Du

中国海洋大学化学化工学院

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Abstract The inhibitive effect of compound corrosion inhibitor for carbon steel in natural seawater was studied by weight loss method.The inhibitory mechanism was analyzed by polarization curves and EIS.The results showed that the critic al concentration was 280mg/L and the inhibitive efficiency was 938% without pre-filming process,and local corrosion was not found; the critical concentration was 210mg/L and the inhibitive efficiency was 931% with pre-filming process (1000mg/L,48h).The results of polarization curve indicated that the corrosion inhibitor was mixed-type inhibitor,which mainly inhibits anodic reaction.The results of EIS revealed the reaction of this inhibitor was composed of three stages:corrosion inhibitors were adsorbed on electrode surface primarily during initial stage of reaction,and the first inhibitor film was formed until 48h,while the film developed to multilayers during anaphase stage of reaction.

Key words: corrosion inhibitor natural seawater polarization curve EIS inhibitory mechanism

Received: 26 March 2004

ZTFLH:	P714
	P755.3

Corresponding Authors: Zhenjun Ju E-mail: ssdm99@mail.ouc.edu.cn

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Cite this article:

Zhenjun Ju; Min Du. THE STUDY OF INHIBITIVE MECHANISM OF CORROSION INHIBITORS FOR CARBON STEEL IN NATURAL SEAWATER. J Chin Soc Corr Pro, 2005, 25(4): 205-208 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2005/V25/I4/205

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