Dependence of the corrosion performance of polyaniline films applied on stainless steel on the nature of electropolymerisation solution |
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| Authors: | Mouna Mrad Leila Dhouibi Ezzedine Triki |
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| Affiliation: | aUnité de Recherche “Corrosion et Protection des Métalliques”, Ecole Nationale d’Ingénieurs de Tunis, BP 37, le Bélvédère 1002 Tunis, Tunisia;bInstitut Nationale des Sciences Appliquées et de Technologie, Centre Urbain Nord BP 676 -1080 Tunis, Tunisia |
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| Abstract: | Polyaniline (PANI) films were deposited under cyclic voltammetric conditions on 304L stainless steel by aniline electropolymerisation from acidic and slightly basic solutions containing respectively the followed support-electrolytes: H2C2O4 and KNO3.It was found that the film produced in oxalic acidic medium was more conductive than that obtained in potassium nitrate one.The PANI coatings corrosion performances in 0.5 M NaCl were investigated and compared using standard electrochemical methods, electrochemical impedance spectroscopy (EIS) and SEM analysis.The highest corrosion resisting efficiency was obtained for PANInitrate which exhibited a significant physical barrier property against the attack of corrosive products. However, the corrosion protection of conductive PANIoxalic coating was related to its catalytic behavior. |
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| Keywords: | Polyaniline Electropolymerisation 304L stainless steel Corrosion |
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