Optimization of Corrosion Resistant Coating Based on HT250 Cast Iron in Formic Acid Environment

Abstract

In this paper, the corrosion of HT250 cast iron in formic acid environment was studied. By establishing theoretical model and design, the potential of coating technology in improving the corrosion resistance of cast iron was explored. First, the paper reviews the properties of HT250 cast iron and the theoretical basis of formic acid corrosion mechanism, and then selects the coating materials and sets the technological parameters based on the theoretical basis. Then, using the coating design scheme guided by the theoretical model, the corrosion test was carried out in formic acid environment, and the surface morphology and corrosion performance of the coating were analyzed. The results show that the coating scheme based on theoretical framework has higher protective efficiency than the traditional scheme.