Molybdate‐doped copolymer coatings for corrosion prevention of stainless steel |
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Authors: | Feng Li Guo‐xi Li Jing Zeng Gui‐hong Gao |
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Affiliation: | College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan, People's Republic of China |
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Abstract: | The polypyrrole and polyaniline copolymer coating (PPy‐PAni) and PPy‐PAni doped with sodium molybdate copolymer coating ( ) were synthesized on stainless steel by cyclic voltammetry. The effect of molybdate on the passivation of stainless steel was investigated by linear sweep voltammetry in 0.2 mol L?1 of oxalic acid. The corrosion prevention performances of these copolymer coatings for stainless steel were investigated by linear sweep voltammetry, electrochemical impedance spectroscopy in 1 mol L?1 of sulfuric acid, and potentiodynamic polarization in 0.1 mol L?1 of hydrochloric acid. Copolymer coating doped with molybdate could accelerate the formation of the passive oxide film and have better corrosion prevention efficiencies than PPy‐PAni coating on stainless steel. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40602. |
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Keywords: | coatings conducting polymers copolymers electrochemistry |
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