Welding Zinc Plated. To understand how to weld zinc you need to understand how and why it behaves in particular ways in welding situations. Zinc alloys are used the most because they are low temperatures with low melting points.
The zinc around the weld and the Chromate coating for a greater distance from the weld will be destroyed. Zinc plating uses electroplating to coat the steel in a thin layer of zinc. In order to minimize corrosion a post welding protective coating e-coating is usually required.
The best practice for welding zinc coated steel is to remove the zinc from the immediate area of the weld before welding then repair the coating after welding.
This is because the boiling point of zinc is below the melting point of steel. Welding of zinc-coated steel can be done but specific precautions should be taken. This is because the boiling point of zinc is below the melting point of steel. Zinc will not produce sparks when grinding and it is hard to tell the zinc from the metal sometimes after grinding.