PROTECTION　AND　DAMAGE　OF　PREFORMED　OXIDE　SCALES　OF　Fe－25Cr－5Al　AND－10Al　ALLOYS　DURING　THEIR　SUBSEQUENT　SULFIDATION  

作　　者：Qi, Huibin Zhu, Rizhang He, Yedong Wang, Shujuan (Department of Surface Science and Corrosion Engineering,University of Science and Technology Beijing,Beijing100083) 

出　　处：《中国有色金属学会会刊：英文版》1994年第4期66-71,共6页Transactions of Nonferrous Metals Society of China

摘　　要：ＰＲＯＴＥＣＴＩＯＮＡＮＤＤＡＭＡＧＥＯＦＰＲＥＦＯＲＭＥＤＯＸＩＤＥＳＣＡＬＥＳＯＦＦｅ－２５Ｃｒ－５ＡｌＡＮＤ－１０ＡｌＡＬＬＯＹＳＤＵＲＩＮＧＴＨＥＩＲＳＵＢＳＥＱＵＥＮＴＳＵＬＦＩＤＡＴＩＯＮ￥Ｑｉ，Ｈｕｉｂｉｎ；Ｚｈｕ，Ｒｉｚｈａｎｇ；Ｈｅ...The influence of preoxidation of Fe-25Cr-5Al and Fe-25Cr-10Al alloys on their subsequent sulfidation has been studied by a thermogravimetrical method. The oxidation-sulfidation procedure was decided according to the acoustic emission measurement results of the oxidizing-cooling processes. The transformation from oxidation to sulfidation at higk temperatures was achieved.As a result, the outstanding cracking of the oxide scale was avoided. It is found that a complete alumina scale can impede effectively the occurrence and the development of sulfidation. Its protection, however, has a concern with the alloy composition. The microdefects of oxide scale are the places where sulfide nodules appeared and grew. They are also the main factors to decide whether the preformed oxide scale be still protective.

关 键 词：Fe-25Cr-5Al Fe-25Cr-10Al PREOXIDATION SULFIDATION 

分 类 号：TG146[一般工业技术—材料科学与工程]