Galvanizing refers to the surface of metal, alloy or other materials coated with a layer of zinc to play the role of beautiful, rust prevention and other surface treatment technology. Galvanizing is the process of adding zinc coating to the surface of steel or iron. Because zinc acts as a sacrificial coating, it protects the steel or iron underneath, thus extending the life of metal parts. But galvanizing is a complex process that can be done in a variety of ways. There are different forms of galvanizing, including hot dip galvanizing and hot diffusion galvanizing, and these variations each have advantages and disadvantages. Therefore, it is helpful to understand the different forms of galvanizing before incorporating it into a prototyping or manufacturing project.