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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.
Through the static device, the inhibitory effect of the surface oxidization and coking of the aviation kerosene RP-3 under supercritical pressure after the surface phosphating, pickling passivation and electrolytic passivation of stainless steel was studied, and the durability of the surface passivation layer was evaluated The results show that the passivation layer of stainless steel effectively reduces the catalytic activity of the stainless steel surface, and the order of the coking suppression effect is as follows: electrolytic passivation> pickling passivation> phosphating; passivation film with good chemical stability and corrosion resistance Layer will extend the service life of the material, according to the corrosion resistance of the passivation film sort: electrolytic passivation> pickling passivation> phosphating; coking suppression effect and chemical stability of two factors considered, electrolytic passivation for the best surface Passivation scheme, but its in the high temperature and high corrosion of kerosene environment easy to lose passivation when long-term experiments.