Hello, every metal, including stainless steel, is prone to corrosion. The chemical composition of the metal, the application environment, and the environmental conditions it is exposed to determine the duration of corrosion. Subsequent processes such as coating or painting create a barrier between the metal and the outside environment. This barrier protects the metal from external factors and reduces the risk of corrosion. However, over time, this barrier can wear down, scratch, or deteriorate. In this case, the metal comes back into direct contact with external conditions and becomes exposed to corrosion. Hot Dip Galvanizing and Paint Combination Both powder paint and wet paint applications can be made on hot dip galvanized surfaces. However, the gas emission that occurs after the galvanizing process should be considered. Paint applications made before the completion of gas emission can cause the paint to be thrown off or peel from the surface. To prevent this problem: Gas Emission Process: After galvanization, the metal should be allowed to complete its gas emission. Surface Preparation: Prior to painting, the surface should be cleaned and primed appropriately for the paint application. Apart from this, direct paint applications can be made on galvanized sheet. However, proper surface preparation is of critical importance in this process. For long-term protection, I can suggest some combinations, but you should remember that these will be average durations: Hot Dip Galvanizing: 10-15 years Galvanized + Epoxy Based Powder Paint: 15-20 years Galvanized + Polyurethane Wet Paint: 20-25 years Zinc Phosphate Coating + Galvanized + Paint: 25-30 years For more information on your specific application and project requirements, you can get support from the Xometry team: info@xometry.com.tr