The Preparation of Environment-Friendly Compound Corrosion Inhibitor for A20 Steel in Citric Acid Pickling

Abstract:

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A kind of efficient, environment-friendly compound inhibitor was prepared with 2-mercaptobenzimidazole (2MBI), potassium iodide, triethanolamine, polyoxyethylene nonylphenyl ether and peregal by weight loss through orthogonal experiment. The effects of the compound on corrosion of A20 steel in citric acid have been investigated in relation to it’s concentration by weight loss measurements, polarization curve methods and electrochemical impedance spectroscopy (EIS). The result of weight loss reveals that the compound is a good inhibitor whose efficiency can reach 98.8%. Polarization curve results show that the compound restrain the process of cathode and anode, belonging to anode control-oriented and charge transfer-controlled. EIS results show that the changes in the impedance parameters (Rp and Cd) with concentrations of the compound are indicative of the adsorption of these molecules leading to the formation of a protective layer on steel surface.

Info:

Periodical:

Advanced Materials Research (Volumes 233-235)

Edited by:

Zhong Cao, Lixian Sun, Xueqiang Cao, Yinghe He

Pages:

1354-1357

DOI:

10.4028/www.scientific.net/AMR.233-235.1354

Citation:

D. W. Yang et al., "The Preparation of Environment-Friendly Compound Corrosion Inhibitor for A20 Steel in Citric Acid Pickling", Advanced Materials Research, Vols. 233-235, pp. 1354-1357, 2011

Online since:

May 2011

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Price:

$35.00

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