Hot-dip galvanizing involves applying a layer of zinc to steel to prevent corrosion. The products are immersed in a zinc bath. Due to the chemical reaction between the zinc and the steel, both materials bind to each other in a sustainable manner. The resulting alloy protects against corrosion well into the future. This makes hot-dip galvanizing extremely suitable for products with an outdoor application. The temperature of the zinc bath is more than 450 degrees Celsius, which means there is a risk of the material deforming. As a result, hot-dip galvanizing is not suitable for material thicknesses thinner than 5mm. Hot-dip galvanizing requires
post-treatment of screw holes, for example.
In the process of electro-galvanizing, a thin layer of zinc is applied over a steel surface. It is applied by means of electrolysis. During this process a shiny, corrosion-resistant coating is created. The entire process, including the thickness of the layer, can be precisely controlled. Post-treatment of screw holes, for example, is not necessary in this process. The temperature of a zinc solution bath is usually around 60 degrees Celsius, which means that products do not deform during this galvanizing process. However, this method of galvanizing is less corrosion-resistant than hot-dip galvanizing.