Galvanizing thickness protective process and layering extent
The duration of the protection against corrosion is proportional to the galvanizing thickness, ensured by the galvanizing process that supplies coating. Different weather conditions and types of the atmospheric agents to be endured might indicate a more or less consistent galvanizing thickness.
The purpose of a galvanizing process consists in coating with a surface film manufactured in order to ensure long-lasting resistance. From smallware to metalworks, every piece that needs to go through the galvanizing process, depending on steel’s chemical composition and its staying time in the molten zinc bath, may have a varying coating thickness.
A corrosive process, whose intensity is foreseeable, will result therefore in a coating thickness that’s calculated in a certain consistency. If, for example, an average thickness loss of less than 0.1 µm over a twelve month period is expected when placed in a dry indoor environment, while in an outdoors high air humidity industrial area, there comes a risk of compromising the outward coating at a steep 4 to 8 µm by year. (standard reference data UNI-EN-ISO 14713).