Improve the anticorrosive performance of alkyd paint films using perylene pigment

Abstract

The aim of this paper is to investigate the effect of perylene pigment on the protective properties of alkyd paint films (carbon steel substrate) using electrochemical techniques (EIS and stepwise polarisation). The interpretation of the impedance spectra (Nyquist and Bode diagrams) with the immitance analysis Equivcrt. Programme established two electrical equivalent circuits (with two and four time constants) for the carbon steel/alkyd film systems in electrolyte solution, fitted to the experimental data. The electric capacitance and resistance of the alkyd films were monitored with immersion time to establish the water and ions permeability of these paint films. The electrochemical parameters of alkyd painted carbon steel from the anodic potentiostatic polarisation curves were determined. The correlation of all experimental results established that the tested pigment increase the protective performances of alkyd coating.