化工学报Issue(3)：1059-1065,7.DOI:10.11949/j.issn.0438-1157.20141215
25Cr35NiNb合金表面Al-Si-Cr涂层抑制结焦性能
Anti-coking characteristics of Al-Si-Cr coating on 25Cr35NiNb alloy
摘要
Abstract
Al-Si-Cr coating was prepared on the surface of 25Cr35NiNb alloy by pack cementation, and its anti-coking properties were studied by coking experiment using ethylene cracking test apparatus. The microstructure of coating and the morphology of coke were investigated with metallurgic microscope, electronic scanning microscope (SEM) and energy dispersive X-ray spectrometer (EDS). Al-Si-Cr coating with thickness of about 130μm was obtained by pack cementation. The coating had multiple layers with dense structure, consisting of an outer layer composed of aluminum-silicon-rich compounds and an inner layer composed of chromium-silicon-rich compounds. The Al-Si-Cr coating had excellent coking inhibiting properties. It could inhibit catalytic coking effectively, and the rate of coke inhibition was up to 72.5%.关键词
乙烯裂解/焦化/抑制结焦/涂层/包埋渗Key words
ethylene cracking/coking/coking inhibition/coating/pack cementation分类
矿业与冶金引用本文复制引用
屈笑雨,刘京雷,徐宏,陆阳,刘建书..25Cr35NiNb合金表面Al-Si-Cr涂层抑制结焦性能[J].化工学报,2015,(3):1059-1065,7.基金项目
高等学校博士学科点专项科研基金项目(20110074110009)。@@@@supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China (20110074110009) （20110074110009）
