Synthesis of oxalate doped polyaniline and its corrosion protection performance |
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Authors: | Kandhasamy Kamaraj Tamilvanan Siva Sadagopan Sathiyanarayanan Sundarrajan Muthukrishnan Gopalachari Venkatachari |
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Affiliation: | (1) CSIR-Central Electrochemical Research Institute, Karaikudi, 630006, India; |
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Abstract: | It is known that dopants present in polyaniline (PANI) play an important role in corrosion protection of mild steel since the dopant ions form a secondary layer with iron. Since oxalate ions form a stable iron oxalate layer on mild steel, a study has been made on the corrosion protection performance of steel by vinyl coating containing oxalate doped PANI in acid and neutral media. Electrochemical impedance spectroscopy (EIS) studies have shown that the oxalate doped PANI is able to protect mild steel in sodium chloride solution since the impedance values are maintained at 1010 Ω cm2 even after 100 days of exposure. |
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