The Effect of Zinc Bath Formulation on the Corrosion Resistance of Galvanized Steel: A Short Review

In recent years, hot-dip galvanizing techniques have become a promising method for surface treatment in many industries. This treatment dramatically extends the life of metal parts by protecting them from corrosive elements such as water, salt, air, and chemicals. The electrochemical, mechanical, and aesthetic properties of hot-dip galvanized coatings are closely related to the bath formulation and the control parameters. This review discusses the effect of additive elements and control parameters on corrosion resistance, mechanical properties, and coating appearance. A comparative study between alloyed and standard zinc coatings is carried out based on the state of the coating after exposure in natural sites to accelerated corrosion tests or electrochemical tests.