Development and Characterization of Polyurethane Coatings for Enhanced Anti-Corrosive Properties

Abstract:

Around 90% of the polyols used for in production of polyurethanes currently are based on polyethers obtained from ethylene and propylene oxides. Vegetable oils also produce green polyols.

Polyols from palm oil and palm kernel oil were explored for functional polymeric materials such as epoxy, polyesteramide, alkyd and polyurethane.

Polyurethane coatings were extensively investigated for comparative functional properties. EIS analysis of the polyurethane coated steel samples was performed for corrosion resistance analysis. Nyquist and Bode plots were estimated for degradation. Adhesion of the coatings to the metallic substrates was investigated.

Also, few interesting observations regarding the comparative coating behavior on carbon steel and galvanized steel substrates are reported in this paper.