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| STUDY ON THE FORMATION OF POLYANILINE COATINGS AND ITS CORROSION BEHAVIOR FROM SILANE SOLUTIONS |
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Cite this article:
. STUDY ON THE FORMATION OF POLYANILINE COATINGS AND ITS CORROSION BEHAVIOR FROM SILANE SOLUTIONS. Acta Metall Sin, 2007, 43(4): 404-408 .
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Abstract The effects of silane on the formation of polyaniline coatings electropolymerized on zinc-electroplated steel have been investigated by Chronopotentiometry technique. The morphology and thickness of polyaniline coatings are investigated by SEM. Corrosion behavior of chromating films and polyaniline coatings in 3.5% NaCl solution is studied by salt spray test and electrochemical impedance spectroscopy (EIS) method. Experimental results show that the anticorrosion properties of polyaniline coatings are close to that of chromating film because of its good shielding and inhibiting properties. From the FTIR and XPS values, conclusions can be as follows: (1) The doping level for the Pani films modified by γ-APS is increased and the oxidation level is reduced comparing with Pani films without modification, which are 11% and 64% respectively；（2）There are four chemical environment : C-Si-O-Si, C-Si-OH, C-Si-O-C， C-Si-O-Zn.
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Received: 21 July 2006
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