Electrochemical synthesis of polypyrrole-SiO2 composite coating on 316 stainless steel for corrosion protection. Issue 4 (5th June 2017)

• Record Type: Journal Article
• Authors: Yan, Qun; Li, Chuanxian
• Is Part Of: Anti-corrosion methods and materials. Volume 64:Issue 4(2017)
• Page Start: 452
• Page End: 460
• Publication Date: 2017-06-05
• Subjects: Polypyrrole -- Anticorrosion performance -- Composite coating -- Electrochemical synthesis -- SiO2; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1108/ACMM-02-2016-1650
• Languages: English
• ISSNs: 0003-5599

Abstract

Abstract : Purpose: The 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/approach: This study is based on elaboration of coating by electrochemical process and of SiO2 by a sol-gel process. Findings: Electrochemical 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/value: To 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.