Chlorine-induced high-temperature corrosion is a major problem for structural materials used in incinerators because of the release of hydrochloride during waste combustion. In this work, the effect of HCl additions (0.05 and 0.1 vol%) to a N2–10CO2–10H2O gas on the oxidation of binary ferritic Fe—(15, 20, 25 and 30 wt%) Cr alloys was investigated at 650 °C. The addition of HCl significantly increased the rate of weight gain during reaction. Thick multi-layered iron-rich oxide scales formed on Fe-15Cr in all gases. Increasing Cr content increased the tendency for Cr2O3 scale formation, leading to complete protection for Fe-25Cr in HCl-free gas, but a level of 30Cr was required in the presence of HCl. Mechanisms underlying the effect of chlorine on the critical Cr concentration required for protective chromia formation are explored.

中文翻译：

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氯化氢对 Fe-Cr 合金在 650 °C 湿 CO2 气体中腐蚀行为的影响

由于在废物燃烧过程中会释放盐酸盐，氯引起的高温腐蚀是焚化炉中使用的结构材料的主要问题。在这项工作中，研究了在 N2–10CO2–10H2O 气体中添加 HCl（0.05 和 0.1 vol%）对二元铁素体 Fe-（15、20、25 和 30 wt%）Cr 合金在 650 ° C。HCl 的加入显着增加了反应过程中的增重速率。在所有气体中，在 Fe-15Cr 上形成厚的多层富铁氧化皮。增加 Cr 含量会增加 Cr2O3 水垢形成的趋势，从而完全保护无 HCl 气体中的 Fe-25Cr，但在 HCl 存在下需要 30Cr 的水平。探索了氯对形成保护性氧化铬所需的临界 Cr 浓度影响的潜在机制。