Corrosion protection of mild steel using nanomaterials coating

Abstract

Effectiveness of nanoparticle coatings in preventing corrosion of mild steel metal samples were experimentally determined. TiO2 and ZrO2 nanoparticles coatings were done by brush coating. Different samples were prepared by varying the parameters such as thickness of coatings, concentration of nanoparticles and temperature of heat treatment. Corrosion rate of both uncoated mild steel and coated using TiO2, ZrO2 samples was determined in the corrosive environments of 1M HCl and 3.5 wt% NaCl. From the experiments it was found that the coated mild steel samples prepared at temperature 80 °C are more effective than samples prepared at 200° C. It is observed that TiO2 coatings prepared with ratio 2:0.3, 0.182 mm coating thickness and heat treated at 80°C, and ZrO2 coatings with thickness of 0.185 mm, prepared from nanoparticle paste of 1:0.3 ratios, heat treated at 80 °C, have shown better protection for mild steel in 1M HCl and 3.5% NaCl solutions compared with other TiO2 and ZrO2 coatings.