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Corrosion studies of PPy/Ni organic–inorganic hybrid bilayer coatings on commercial carbon steel

AutorDomínguez-Crespo, M.A.; Torres-Huerta, A.M.; Onofre-Bustamante, E.; Alanis-Valdelamar; Escudero Rincón, María Lorenza; Brachetti-Sibaja, S.B.
Fecha de publicación2015
EditorSpringer
CitaciónJournal of Solid State Electrochemistry 19 (4): 1073-1089 (2015)
Resumen© 2014, Springer-Verlag Berlin Heidelberg. Electrodeposition of polypyrrole (PPy) was achieved on AISI 1018 carbon steel (CS) using a constant potential regime and cyclic voltammetry techniques evaluating different synthesis parameters, in monomer-containing oxalic acid solutions. Thereafter, CS PPy/Ni bilayer films were produced by Ni deposition onto PPy films using a potentiostatic method. The electrochemical performance of PPy/Ni-coated carbon steel systems was investigated in 3.0 wt% NaCl solutions. For this purpose, scanning Kelvin probe (SKP), open-circuit potential (E<inf>ocp</inf>), polarization curves, and cyclic voltammetry techniques were used. The influence of electro-synthesis method and parameters were analyzed. It was found that the deviation in the Volta potentials is correlated to the interfacial interaction between the PPy/Ni bilayer coating and substrate. Considering both experimental methods to obtain PPy/Ni coatings, a more effective protection against corrosion can be formed when potentiodynamic (cyclic voltammetry) and potentiostatic techniques are combined.
URIhttp://hdl.handle.net/10261/122275
DOI10.1007/s10008-014-2712-8
Identificadoresdoi: 10.1007/s10008-014-2712-8
issn: 1432-8488
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