Potentiodynamic Polarization and Mathematical Modelling Study of Corrosion Resistance Properties of Zinc Galvanized Roofing Sheet In 0.5m Hcl

This paper investigate the corrosion resistance properties of zinc galvanised roofing sheet selected from Nigeria manufacturing industries in an attempt to predict its durability, efficiency and corrosion properties in 0.5 M HCl. The electrochemical behaviour assessment was done using potentiodynamic polarization and COMSOL multiphyics prediction for 1, 6 and 12 month for all selected zinc galvanised steel under study. It was found that sample B provide higher corrosion resistance propagation of 151.81(Ω) with significant Ecorr value of -1.4057V thus, with corrosion rate of 2.452 mm/yrs. The least effective from produce zinc galvanised steel is sample E with 11.979(Ω)in the presence of 0.5 M HCl. A higher corrosion rate of 9.5462 mm/y was obtained for sample E as against 2.452 mm/y of sample B. This was further confirmed by the predictive simulation and modelling degradation analysis.