Journal
CORROSION SCIENCE
Volume 82, Issue -, Pages 77-84Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2013.12.022
Keywords
Zinc; Carbon steel; Stainless steel; Oxide coatings; Cathodic protection; Potential parameters
Funding
- National Natural Science Foundation of China [41206067]
- Postdoctoral Science Foundation of China [2011M500771]
- Postdoctoral Innovation Project of Shandong Province [201103086]
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This paper discusses the effects of the coupling of ZnO-Zn, Q235 carbon steel, and 304 stainless steel on their corrosion in 3.5% NaCl under white light illumination. In the presence of Na2S, ZnO provided photoelectrochemical cathodic protection for the coupled metals. In the absence of Na2S. ZnO could only provide photoelectrochemical cathodic protection for 304 stainless steel. Under white light illumination, the open circuit potential of ZnO photoelectrode shifted in the negative direction. ZnO provided photoelectrochemical cathodic protection to the metals only when the open circuit potential of ZnO photoelectrode was more negative than that of the metals. (C) 2014 Elsevier Ltd. All rights reserved.
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