摘要
研究了Fe-15Cr-10Al合金在700℃还原性H_2-CO_2和H_2-HCl-H_2S-HCl混合气氛中的腐蚀行为.结果表明,添加到H_2-CO_2气氛中的微量HCl和H_2S导致合金表面氧化铝膜退化,在合金表面生成了铁铬铝混合氧化物层.这种退化与腐蚀过程中生成的硫化物和氯化物密切相关.计算混合气氛中平衡时的氯势、氧势和硫势预测了合金与气氛可能发生的反应,并解释了腐蚀机制.
The corrosion behavior of Fe-15Cr-10Al alloy was examined at 700 ℃ in the reducing H2-CO2 and H2-HCI-H2S-HCI atmosphere. As a result, the minor addition of HCI and H2S to a H2-CO2 atmosphere induced the degradation of protective alumina and the growth of Fe, Cr and Al oxide mixtures on the surface of Fe-15Cr-10Al alloy, which was attributed to the formation of sulfides and chlorides in the scales during corrosion procedure. The equilibrium partial pressures of chlorine, oxygen and sulfur in the mixed gases were calculated to estimate the possible reactions between the alloy components and the multi-reactants, and their corrosion mechanisms were also interpreted.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2008年第6期606-610,共5页
Chinese Journal of Materials Research
基金
国家自然科学基金50671114
江苏省高校自然科学基金08KJB43003资助项目~~
