Abstract Stellite-6 (Co-based) and NiAl coatings (Ni-based) were deposited via HVOF spraying onto 304 stainless steels and tested in a 20 kWth biomass fired bubbling fluidised bed (BFB) combustor for 20 h and an industrial scale anthracite fired CFB boiler for 1630 h. Stellite-6 showed excellent corrosion resistance in both fluidised bed combustion systems because of the formation of the outermost Cr2O3 layer and the spinel CoCr2O4 beneath, whereas NiAl coatings’ anti-corrosion performance was significantly depleted due to the chlorine attack, and the resultant formation of Al2O3 layer at the coating/substrate interface finally led to coating spallation in both systems.

中文翻译：

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HVOF热喷涂Stellite-6和NiAl涂层与流化床生物质/无烟煤燃烧系统氯诱导腐蚀的实验研究

摘要 Stellite-6（Co 基）和 NiAl 涂层（Ni 基）通过 HVOF 喷涂沉积到 304 不锈钢上，并在 20 kWth 生物质燃烧鼓泡流化床 (BFB) 燃烧器中测试 20 小时，并在工业规模的无烟煤燃烧器中进行测试。 CFB 锅炉 1630 小时。由于最外层的 Cr2O3 层和下方的尖晶石 CoCr2O4 的形成，Stellite-6 在两种流化床燃烧系统中均表现出优异的耐腐蚀性，而 NiAl 涂层的防腐性能由于氯的侵蚀而显着降低，并由此形成涂层/基材界面处的 Al2O3 层最终导致两个系统中的涂层剥落。