High-Temperature Corrosion Resistance of Laser Cladding NiCrMo AlloyCoating on 15CrMo Steel Tube Surface for Waste Incinerator

NiCrMo alloy coating was prepared on 15CrMo steel tube surface of waste incinerator by laser cladding technique. In the simulated high-temperature corrosion environment of waste incineration plant, the high-temperature corrosion resistance of coating was studied. The results show that the laser cladding NiCrMo alloy coating was uniform and dense, and metallurgical bonded with the substrate. The weight loss rate of the coating after corrosion for 72 h in the simulated high-temperature corrosion environment of waste incineration plant was 119.02 g·m^-2, which was only 40% of that of the substrate, indicating that the coating had excellent high-temperature corrosion resistance which was mainly related to Cr₂O₃, Fe₂ (MoO₄) ₃ and NiO oxides generated in the corrosion process.