垃圾焚烧炉15CrMo钢管表面激光熔覆NiCrMo合金涂层的耐高温腐蚀性能

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

摘要: 利用激光熔覆技术在垃圾焚烧炉15CrMo钢管表面制备NiCrMo合金涂层，在垃圾焚烧厂高温腐蚀模拟环境中研究了涂层的耐高温腐蚀性能。结果表明：激光熔覆NiCrMo合金涂层均匀、致密，与基体呈冶金结合；涂层在生活垃圾焚烧厂高温腐蚀模拟环境中腐蚀72 h后的质量损失率为119.02 g·m^-2，仅为基体的40%，说明涂层具有优异的耐高温腐蚀性能，这主要与腐蚀过程中生成的Cr₂O₃、Fe₂（MoO₄）₃和NiO氧化物有关。

Abstract: 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.