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.
This study is based on elaboration of coating by electrochemical process and of SiO2 by a sol-gel process.
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.
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.
Yan, Q. and Li, C. (2017), "Electrochemical synthesis of polypyrrole-SiO2 composite coating on 316 stainless steel for corrosion protection", Anti-Corrosion Methods and Materials, Vol. 64 No. 4, pp. 452-460. https://doi.org/10.1108/ACMM-02-2016-1650
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