Comparative study of polyaniline and poly(1-naphthylamine) dispersed oil polyurethane coatings

Abstract

Purpose - The purpose of this paper is to report a comparative study of conducting polymer (CP) dispersed oil polyurethane coatings derived from a sustainable resource, i.e. polyaniline (PANI)/coconut oil polyesteramide urethane (CPEAU) and poly(1-naphthylamine) (PNA)/linseed oil polyurethane (LPUA) coatings. Design/methodology/approach - The coatings were prepared chemically and were characterized for their physico-chemical, physico-mechanical, corrosion protective efficiency, and open circuit potential measurements. The morphological analysis of the corroded carbon steel (CS), coated uncorroded CS, and coated corroded CS specimens, was carried out by SEM analysis. Findings - The study revealed that the presence of a CP enhanced the corrosion protective efficiency of the sustainable resource-based organic coatings. The type of CP used also played a major role in defining the corrosion resistance behavior of the coating materials. Originality/value - The comparative study of anticorrosive properties of CP with oil-based polyurethane blends has been studied for the first time. © Emerald Group Publishing Limited.