期刊
JOURNAL OF POWER SOURCES
卷 195, 期 7, 页码 1914-1919出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2009.10.003
关键词
Proton-exchange membrane fuel cell; Bipolar plates; 304 Stainless steel; Corrosion; Polyaniline coatings; Sodium dodecylbenzesulfonate
Polyaniline coating doped with dodecylbenzesulfonate anions is electrodeposited galvanostatically on type 304 stainless steel used as bipolar plates of proton-exchange membrane fuel cell from a basic solution of 0.3 M aniline monomer solution containing sodium dodecylbenzesulfonate as a supporting electrolyte. Electrochemical measurements in 1 M H2SO4 and in 0.3 M HCl show that the polyaniline coating increases the free corrosion potential of the steel by more than 300 mV and 450 mV, respectively, with a corrosion rate more than two orders of magnitude lower than that of the uncoated steel. Long-term exposure studies show that the coating is highly stable and inhibits the corrosion of the steel effectively. (C) 2009 Elsevier B.V. All rights reserved.
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