Comparison of corrosion protective performance of nanostructured polyaniline and poly(1-naphthylamine)-based alkyd coatings on mild steel

Nanostructured materials have been establishing themselves as modern generation of high performance materials in many areas ranging from automotive engineering to bioengineering owing to a vast array of their unique properties. Improvements in environmental impact can also be achieved utilizing nanostructure particulates in coating and eliminating the requirement of toxic inhibitors such as chromates. The paper reports a comparative study on the corrosion resistance performance of soya oil alkyd containing nanostructured polyaniline (PANI) and poly(1-naphthylamine) (PNA) composite coatings. The corrosion protective performance was evaluated by physico-mechanical properties, corrosion rate, open circuit potential measurements, and SEM studies. The PNA/alkyd composite coatings were found to show far superior corrosion resistance performance as compared to PANT/alkyd system.