Galvanized steel is regular steel protected by a layer of zinc, which gives it corrosion resistance and a more visually appealing look. Zinc does not rust and protects the steel from the oxidation process when in contact with air. 

==>You can laser weld galvanized steel, but it can be challenging.

The main issue with galvanized steel welding lies in the protective zinc layer. Zinc has a lower melting point than the steel underneath it. As the heat hits the zinc, it starts to evaporate, creating toxic fumes that pose health risks for nearby welders.

Burning zinc also increases the risk of porosity and oxidation inside the weld. In addition, the zinc layer can absorb some of the laser's light. As a result, it can be challenging to produce a well-formed weld seam.

To deal with these issues, you must adjust equipment parameters and optimize welding processes based on the thickness of the galvanized steel and the zinc layer. To keep yourself safe from harmful fumes, you will need enhanced ventilation and protective measures. Adjusting the offset angle of laser beams can help you reduce zinc spatter.