Preparation and characterisation of high performance anticorrosive paints based on novel corrosion inhibitive amide polymers

Abstract

New types of amide polymers have been prepared and evaluated as corrosion inhibitors for steel protection. Such polymers included o‐, m‐, and p‐ itaconyl phenylene amides, itaconyl o‐ tolidine amide and maleiyl phenylene amide polymers. The polymers were prepared by condensation of equimolar ratios of diamine with itaconic or maleic acids in non‐polar solvents of high boiling point (>135°C) using the Dean and Stark apparatus. The amide polymers obtained were characterised and their structures confirmed based on the micro‐analysis of C, H, and N, the estimated amount of water liberated from the condensation reaction, the IR spectrophotometric measurements and the molecular weight determined by gel permeation chromatography (GPC). The amide polymers obtained were incorporated into paint formulations as corrosion inhibitors for steel protection.