A nine-year atmospheric exposure test was performed on Zn-30mass%Al thermal spray coating under the corrosion environment using the artificial sea water. A similar corrosion test carried out to compare the properties with Hot-dip-Zinc coating. Atmospheric corrosion properties of thermal spray coating were evaluated by surface observation, X-ray diffraction, film thickness measurement and element analyses using EPMA. From these analysis results, the thickness of thermal spray coating was not impacted greatly under corrosion environment using the artificial sea water. In addition, corrosion resistance of Zn-30mass%Al thermal spray coating is much higher than that of Hot-dip-Zinc coating.
