Journal
PORTUGALIAE ELECTROCHIMICA ACTA
Volume 32, Issue 4, Pages 281-293Publisher
SOCIEDADE PORTUGUESA ELECTROQUIMICA
DOI: 10.4152/pea.201404281
Keywords
Polypyrrole; Bilayers; Molybdate; AOT; Anticorrosive properties; SAE 4140 steel
Categories
Funding
- CONICET, Argentina
- ANPCYT, Argentina
- Universidad Nacional del Sur, Bahia Blanca, Argentina
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In this study polypyrrole (PPy) bilayers films were electrodeposited onto SAE 4140 steel. The inner layer was electropolymerized in the presence of molibdate and nitrate and the outer layer in a solution containing sodium bis (2-ethylhexyl) sulfosuccinate (AOT). The electrosynthesis was done under potentiostatic conditions. The corrosion protection properties of the films were examined in sodium chloride solution by open circuit measurements, linear polarization and electrochemical impedance spectroscopy (EIS). The bilayer coatings present an improved anticorrosive performance with respect to single PPy films.
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