FeWAl涂层及其耐高温硫腐蚀性能  

HIGH TEMPERATURE SULFIDATION PROPERTY OF FeWAl COATING

作　　者：齐慧滨[1] 何业东[1] 李方 黄震中[1] 朱日彰[1] 

机构地区：[1]北京科技大学冶金部腐蚀-磨蚀与表面技术开放研究实验室

出　　处：《腐蚀科学与防护技术》1998年第6期311-315,共5页Corrosion Science and Protection Technology

基　　金：国家自然科学基金;IET教育基金;金属腐蚀与防护国家重点实验室资助

摘　　要：通过在碳钢上电镀ＦｅＷ合金镀层然后固相渗Ａｌ，获得了ＦｅＷＡｌ涂层．对比研究了在８００℃硫压为１０３Ｐａ，氧压为１０－２１Ｐａ或１０－３～１Ｐａ条件下ＦｅＡｌ和ＦｅＷＡｌ涂层的硫化行为．结果表明，在高硫压（１０３Ｐａ）、低氧压（１０－２１Ｐａ）环境中，ＦｅＡｌ和ＦｅＷＡｌ涂层均发生了灾难性腐蚀，腐蚀产物呈粉状．而适当提高环境中的氧分压（１０－３～１Ｐａ）时，ＦｅＷＡｌ涂层具有良好的抗硫化性能．当在Ｆｅ－ＷＡｌ涂层表面涂敷Ｆｅ２Ｏ３＋ＳｉＯ２混合层时，提高了涂层表面的氧分压，在高硫压低氧压的环境中促进了由硫化向氧化的转变，显著降低了腐蚀速度．An FeWAl coating has been acquired by FeW alloy electroplating and subsequent pack aluminizing. The sulfidation behavior of FeAl and FeWAl coatings have been studied in mixed gases with sulfur partial pressure of 10 3 Pa and oxygen partial pressure of 10 -21 Pa or 10 -3 ～1 Pa at 800℃. The results showed that catastrophic corrosion occurred for both FeAl and FeWAl coatings in the environment with high sulfur pressure and low oxygen pressure and resulted in powder products. While the oxygen partial pressure was increased properly (e.g. 10 -21 Pa), the FeWAl coating was of quite good resistance to sulfidation. When the Fe 2O 3 SiO 2 mixture was superficially covered on the FeWAl coating, the transition from sulfidation to oxidation was promoted, resulting in a good resistance to sulfidation with low corrosion rate.

关 键 词：FeWAl涂层 高温硫腐蚀 腐蚀 涂层 碳钢 

分 类 号：TG174.44[金属学及工艺—金属表面处理]