Artículos de revistas
Bilayers Polypyrrole Coatings for Corrosion Protection of SAE 4140 Steel
Fecha
2014-07Registro en:
Lehr, Ivana Leticia; Saidman, Silvana Beatriz; Bilayers Polypyrrole Coatings for Corrosion Protection of SAE 4140 Steel; Sociedade Portuguesa de Electroquímica; Portugaliae Electrochimica Acta; 32; 4; 7-2014; 281-293
1647-1571
CONICET Digital
CONICET
Autor
Lehr, Ivana Leticia
Saidman, Silvana Beatriz
Resumen
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.