Abstract Alumina-forming β-NiAl coatings were deposited by high velocity oxy-fuel (HVOF) thermal spraying onto 304 stainless steels for protection against chlorine induced corrosion in a biomass-fired boiler. The corrosion test was conducted in a synthetic gas containing 500 ppm HCl with 10 wt% KCl ash deposit at 700 °C for 250 h. Severe corrosion was observed with the fast growing alumina at the coating/substrate interface initiating from sample edges. Possible corrosion mechanism was proposed: as supplied by HCl/KCl, the formation of volatile chlorine/chloride acted as a catalyst and promoted the growth of alumina at relatively lower application temperatures (

中文翻译：

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HVOF 热喷涂 NiAl 涂层和 304 不锈钢在 700 °C 下氯诱导腐蚀的实验和热力学研究

摘要 通过高速氧燃料 (HVOF) 热喷涂在 304 不锈钢上沉积形成氧化铝的 β-NiAl 涂层，以防止生物质锅炉中氯引起的腐蚀。腐蚀试验是在含有 500 ppm HCl 和 10 wt% KCl 灰沉积的合成气中在 700 °C 下进行 250 小时。观察到从样品边缘开始的涂层/基材界面处快速生长的氧化铝出现严重腐蚀。提出了可能的腐蚀机制：由 HCl/KCl 提供，挥发性氯/氯化物的形成作为催化剂，在相对较低的应用温度下促进了氧化铝的生长（