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Effect of polyaniline/montmorillonite content on the corrosion protection of epoxy coating

Yingjun Zhang (College of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong, China and College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, China)
Yawei Shao (College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, China)
Qiumei Shi (Xuzhou Construction Machinery Group Co. Ltd., Xuzhou, China)
Yanqiu Wang (College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, China)
Guozhe Meng (College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, China)
Ping Li (College of Shipbuilding Engineering, Harbin Engineering University, Harbin, China)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 3 January 2017

237

Abstract

Purpose

The purpose of this paper was to research the influence of polyaniline/montmorillonite (PANI/OMMT) composite powder content on the corrosion protection of epoxy (EP) coating.

Design/methodology/approach

The polyaniline/montmorillonite/epoxy (PANI/OMMT/EP) coatings containing different contents of PANI/OMMT composite powder were prepared on steel. The corrosion protection performances of PANI/OMMT/EP coatings in 3.5 per cent NaCl solutions were investigated by electrochemical impedance spectroscopy. The barrier property of coatings was examined using water absorption analysis. The structure and crosslink density of coatings were examined using scanning electron microscopy and differential scanning calorimetry, respectively.

Findings

The PANI/OMMT composite powder could enhance the barrier properties of the EP coating and reduce the corrosion rate of the steel beneath the coating. The coating showed the best corrosion protection performance when 3 per cent PANI/OMMT powder was added to the coating.

Originality/value

The research clarified the influence of PANI/OMMT content on the corrosion protection of coating from two aspects: one is the barrier performance of the coating; the other is the corrosion inhibitors for metal substrate.

Keywords

Acknowledgements

The authors wish to acknowledge the financial supports of the International S&T Cooperation Project of China (ISTCP) (2014DFR50560) and National Basic Research Program of China, Ministry of Science and Technology, China, under the contract No.2014CB643301.

Citation

Zhang, Y., Shao, Y., Shi, Q., Wang, Y., Meng, G. and Li, P. (2017), "Effect of polyaniline/montmorillonite content on the corrosion protection of epoxy coating", Anti-Corrosion Methods and Materials, Vol. 64 No. 1, pp. 75-82. https://doi.org/10.1108/ACMM-03-2015-1511

Publisher

:

Emerald Publishing Limited

Copyright © 2017, Emerald Publishing Limited

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