Molten zinc provides better adhesion with the steel surface as a result of this action, and it reacts with iron and several layers of iron intermetallic compounds, zinc is formed. The order of these layers from the inside to the outside are: gamma (75% zinc, 25% iron), delta (90% zinc, 10% iron), zeta (94% zinc, 6% iron) and the outermost layer eta (100% zinc). After the immersion operation, the piece removed from the molten bath is checked according to the ASTM A780 guidelines, and corrected and repaired if necessary, and if the coating defects cannot be corrected according to the standard requirements, the operation is repeated again. The approved parts are technically inspected according to the ASTM-A123 standard, and a full visual report is completed along with the relevant forms. Thickness measurement and adhesion test report are included in the completed form, and sent to the product warehouse.