Effect of Al2O3 particles on the corrosion behavior of molybdenum alloys in molten zinc

A new method that samples and a certain amount of Zn grains are sealed into a quartz tube under vacuum is designed to investigate the corrosion behavior of molybdenum alloys in molten zinc, with the mechanism of action of Al2O3 investigated. The molybdenum alloys annealed at 1200 ℃ exhibit an excellent corrosion resistance to liquid zinc. After 40 days of corrosion, the corrosion rate of Mo-2.0 wt%Al2O3 decreased by 47.92 % compared with that of pure molybdenum. Al2O3 particles distributing in the matrix and corrosion layer can change the diffusion path of molybdenum and zinc atoms, improving the corrosion resistance of molybdenum alloys.