表面钝化对超临界航空煤油静态结焦特性影响  

Surface passivation effect on the static coke deposition of kerosene at supercritical pressure

作　　者：朱锟[1] 邓宏武[1] 徐国强[1] 张春本[1] 

机构地区：[1]北京航空航天大学航空发动机气动热力重点实验室,北京100191

出　　处：《北京航空航天大学学报》2012年第6期745-749,共5页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家自然科学基金资助项目(50676005)

摘　　要：通过静态装置,研究了不锈钢经表面磷化、酸洗钝化以及电解钝化后对超临界压力下航空煤油RP-3热氧化结焦的抑制效果,并对表面钝化层的耐久性做出评估.研究发现,不锈钢的钝化膜层有效地降低不锈钢表面催化活性,按结焦抑制效果排序为:电解钝化>酸洗钝化>磷化;化学稳定性好、耐蚀性强的钝化膜层会延长材料的使用寿命,按钝化膜耐蚀性排序为:电解钝化>酸洗钝化>磷化;综合结焦抑制效果及化学稳定性两个因素考虑,电解钝化为最佳表面钝化方案,但其在高温高腐蚀的煤油环境下长时间实验时易失去钝化效用.Experiments were performed to investigate surface passivations＇ effect on coking reaction of aviation kerosene RP-3 fuel, and to evaluate the chemical durability of passivating films via the static experiment system at the supercritical pressure. The results reveal that： surface passivation technology on stainless steel can effectively suppress RP-3 coke deposition, the sequence of inhibitory effects of coke deposition from the highest to the lowest is below： electrolytic passivation 〉 acid cleaning passivation 〉 phosphating; The work life of materials depends on chemical durability of passivating films, the sequence of chemical durability of passivating films from the highest to the lowest is below： electrolytic passivation 〉 acid cleaning passivation 〉 phosphating; Based on an overall consideration of various factors, electrolytic passivation is the best option, but out of action at high temperature and high corrosive environment for the long time experiment.

关 键 词：超临界压力 表面钝化 不锈钢 RP-3 热氧化结焦 

分 类 号：V312.1[航空宇航科学与技术—航空宇航推进理论与工程]