Journal
CORROSION SCIENCE
Volume 98, Issue -, Pages 471-477Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2015.05.059
Keywords
Titanium; Stainless steel; Polymer; EIS; Electrodeposited films; Cathodic protection
Funding
- NSFC [21303227, 51403220]
- Hundred Talents Program of Chinese Academy of Sciences
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A new photoanode polypyrrole nanowire/TiO2 nanotube (PPy NW/TiO2 NT) nanocomposite material with a coaxial heterojunction structure is constructed by electrodeposting p-type polypyrrole nanowire into n-type TiO2 nanotubes. Photo-induced open circuit potential, photocurrent density, electrochemical impedance spectroscopy, and Tafel curves are measured under visible light to evaluate the photocathodic protection effect and anticorrosion properties of the nanocomposite. The results indicate that the synergistic effect between the photogenerated cathodic protection and the favorable corrosion resistance of the nanocomposite makes PPy NW/TiO2 NTs nanocomposite a promising material for protecting Ti substrate and the coupled 304 stainless steel from corrosion. (C) 2015 Elsevier Ltd. All rights reserved.
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