Biological corrosion inhibition of steel alloy by pani nano fiber

Sulfate-reducing bacteria are recognized as a major group of microorganisms linked to anaerobic corrosion. Polyaniline is a good inhibitor for microbially influenced corrosion. The polyaniline nanofibres were prepared by interfacial polymerization method and the prepared polyaniline nanofibres were coated on steel coupons. These steel coupons were used for corrosion studies using sulphate reducing bacteria and compared with and without polyaniline nanofibre by weight loss measurements. 5th day polyaniline coated steel coupon inoculated with sulfate-reducing bacteria gave a low corrosion rate and high inhibition efficiency. The polyaniline nanofibre inhibits the corrosion level of the steel coupons induced by sulphate reducing bacteria. Key words: Microbially influenced corrosion (MIC), sulfate reducing bacteria (SRB), polyaniline (PANI) nanofibre.