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Electrochemical synthesis of polypyrrole-SiO2 composite coating on 316 stainless steel for corrosion protection

Electrochemical synthesis of polypyrrole-SiO2 composite coating on 316 stainless steel for... PurposeThe purpose of this paper is to synthesize polypyrrole/SiO2 composite coating on 316 stainless steel (316SS) by cyclic voltammogram and preliminary do research about the valuable effects of SiO2 particle incorporation within the polymer matrix.Design/methodology/approachThis study is based on elaboration of coating by electrochemical process and of SiO2 by a sol-gel process.FindingsElectrochemical impedance studies revealed that compared with polypyrrole (PPy), PPy-SiO2 coating acts as a more protective layer on 316SS against corrosion in 3.5 per cent NaCl. Scanning electron microscopy studies revealed that the PPy-SiO2-coated 316SS showed more uniform and compact morphology.Originality/valueTo fully disperse SiO2, a sol-gel method is used. Hydroxyl group is generated on the surface of inorganic particle by the sol-gel method, which improves the inorganic particle dispersion. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Anti-Corrosion Methods and Materials Emerald Publishing

Electrochemical synthesis of polypyrrole-SiO2 composite coating on 316 stainless steel for corrosion protection

Anti-Corrosion Methods and Materials , Volume 64 (4): 9 – Jun 5, 2017

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0003-5599
DOI
10.1108/ACMM-02-2016-1650
Publisher site
See Article on Publisher Site

Abstract

PurposeThe purpose of this paper is to synthesize polypyrrole/SiO2 composite coating on 316 stainless steel (316SS) by cyclic voltammogram and preliminary do research about the valuable effects of SiO2 particle incorporation within the polymer matrix.Design/methodology/approachThis study is based on elaboration of coating by electrochemical process and of SiO2 by a sol-gel process.FindingsElectrochemical impedance studies revealed that compared with polypyrrole (PPy), PPy-SiO2 coating acts as a more protective layer on 316SS against corrosion in 3.5 per cent NaCl. Scanning electron microscopy studies revealed that the PPy-SiO2-coated 316SS showed more uniform and compact morphology.Originality/valueTo fully disperse SiO2, a sol-gel method is used. Hydroxyl group is generated on the surface of inorganic particle by the sol-gel method, which improves the inorganic particle dispersion.

Journal

Anti-Corrosion Methods and MaterialsEmerald Publishing

Published: Jun 5, 2017

References