高速火焰喷涂Fe-Al/SiC复合涂层耐热腐蚀性能研究  

Hot Corrosion Resistance of HVFS Sprayed Fe-Al/SiC Composite Coatings

作　　者：刘爽[1] 徐润生[2] 刘晓明[2] 

机构地区：[1]山东电力研究院锅检中心,山东济南250002 [2]内蒙古电力科学研究院,内蒙古呼和浩特010021

出　　处：《材料保护》2007年第11期19-21,共3页Materials Protection

摘　　要：采用高速火焰喷涂技术制备了Fe-Al/SiC复合涂层,对涂层在650℃下的热腐蚀动力学规律进行了研究,并利用扫描电镜(SEM)、能谱仪(EDS)和X射线衍射仪(XRD)对涂层及腐蚀产物的成分和形貌进行分析。试验结果表明:Fe-Al/SiC复合涂层基体为Fe-Al相(Fe3Al、FeAl),SiC硬质相分布于涂层之中,呈现典型的层状特征。Fe-Al/SiC复合涂层具有较好的耐热腐蚀能力,经过150h涂盐热腐蚀后,Fe-Al/SiC复合涂层的腐蚀增重值只有基体20钢的30%左右,增重的原因是涂层表面铁的氧化物的沉积。Fe- Al/SiC composite coating was made by HVFS. The hot corrosive dynamics rule of Fe - Al/SiC composite coating and 20 steel was researched at 650℃. The compositions and the products of coating after hot corrosion were analyzed by SEM, EDS and XRD. It indicated that the matrix of Fe-Al/SiC composite coating was Fe-Al phase (Fe3Al,FeAl) and SiC hard phase distributed all over the coating, and the coating displayed the typical layers structure characteristics. Fe-Al/SiC composite coating possesses good hot corrosion resistance. The weight gain of Fe-Al/SiC composite coating after 150 h corrosion test was about 30% of 20 steel under the same test condition. The weight increasing was due to the deposition of iron oxide.

关 键 词：高速火焰喷涂(HVFS) Fe—Al/SiC复合涂层 热腐蚀 20钢 

分 类 号：TG174.442[金属学及工艺—金属表面处理]