铝对Fe－25Cr合金在H_2S－H_2混合气氛中高温硫化腐蚀的作用  

The Influence of Al on the High Temperature Sulfidation of An Fe-25Cr Alloy￣+ in H_2S-H_2 Gas Mixtures

作　　者：朱日彰 齐慧滨 何业东 黄震中 

出　　处：《北京科技大学学报》1994年第A01期1-6,21,共7页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金;中科院腐蚀科学开放室资助

摘　　要：研究了５％Ａｌ、１０％Ａｌ对Ｆｅ－２５Ｃｒ合金在Ｈ２Ｓ－Ｈ２平衡混合气氛中７００～９００℃下高温硫化腐蚀行为。发现加Ａｌ能显著降低Ｆｅ－２５Ｃｒ合金的硫化速度并改变其硫化层的形貌、成分及结构。加Ａｌ合金的硫化动力学在孕育期后遵从抛物线规律。综合反应动力学、硫化层结构和成分分析。提出了Ｆｅ－Ｃｒ－Ａｌ合金的硫化机理。The effects of 5% Al and 10% Al on the sulfidation behaviour of the Fe-25Cr alloy in H2S-H2 gas mixtures in the temperature range of 700～900℃ has been studied.The sulfidation resistance of Fe-25Cr was improved and sulfide scale morphologies,composition and structure of Fe-25Cr were changed remarkably.The sulfidation kinetics of the alloys with aluminium obeyed basically the parabolic law after an initial period of reaction time.The sulfidation mechanism of the Fe-Cr-Al alloy has been proposed.

关 键 词：混合气氛 硫化 黑色金属合金 铝 铬 

分 类 号：TG142.33[一般工业技术—材料科学与工程]