| 25Cr35NiNb合金表面Al-Si-Cr涂层抑制结焦性能 |
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| 引用本文： | 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,2015,66(3):1059-1065. |
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| 作者姓名： | 屈笑雨 刘京雷 徐宏 陆阳 刘建书 |
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| 作者单位： | 1.华东理工大学机械与动力工程学院, 上海 200237;2.无锡化工装备有限公司, 江苏 无锡 214131 |
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| 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 |
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| 摘 要： | 采用固体粉末包埋渗方法在25Cr35Ni Nb合金表面制备Al-Si-Cr涂层,通过乙烯裂解模拟装置中的结焦实验,对涂层抑制结焦性能进行分析评价。运用金相显微镜、扫描电子显微镜(SEM)和能谱仪(EDS)等方法分析了涂层显微组织及结焦层形貌特征。结果表明,采用粉末包埋共渗可以得到厚度在130-m左右的Al-Si-Cr涂层,涂层具有多层结构且组织致密,外层为富铝硅层,内层为富铬硅层;Al-Si-Cr涂层具有良好的抗结焦性能,可有效抑制催化结焦,抑制结焦率达72.5%。
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| 关 键 词： | 乙烯裂解 焦化 抑制结焦 涂层 包埋渗 |
| 收稿时间： | 2014-08-11 |
| 修稿时间： | 2014-12-13 |
Anti-coking characteristics of Al-Si-Cr coating on 25Cr35NiNb alloy |
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| QU Xiaoyu,LIU Jinglei,XU Hong,LU Yang,LIU Jianshu.Anti-coking characteristics of Al-Si-Cr coating on 25Cr35NiNb alloy[J].Journal of Chemical Industry and Engineering(China),2015,66(3):1059-1065. |
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| Authors: | QU Xiaoyu LIU Jinglei XU Hong LU Yang LIU Jianshu |
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| Affiliation: | 1.School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China;2.Wuxi Chemical Equipment Co. Ltd., Wuxi 214131, Jiangsu, China |
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| 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 130 mm 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%. |
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| Keywords: | ethylene cracking coking coking inhibition coating pack cementation |
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