The Ti–Mn cladding layers with different ratios were prepared on the surface of 310S steel using tungsten inert gas (TIG) technology for inhibiting coking in ethylene cracking, and the cladding specimens were oxidized by muffle furnace for 10 h at 800°C. The coking evaluation tests of the oxidized specimens with different Ti–Mn powder ratios were carried out with light naphtha at 850°C. The results show that when the ratio of Ti to Mn was 3:1, a protective layer of TiO₂–Ti_nO_2n‐1–Mn₅O₈ was formed on the surface of specimen, and with the decrease of Ti element content, unstable Fe‐Ti spinel compounds appeared on the surface. When the ratio of Ti to Mn is 1:3, 1:2, and 1:1, the coking inhibition rate was 40%, 46%, and 59%, respectively. Catalytic coke formed on the surface of coating. When the ratio of Ti to Mn was 3:1, the inhibiting coking rate on the surface of the coating reached 80%, and the inhibiting coking performance was optimal, which inhibited the catalytic coking of Fe and Ni metal particles. With the increase of Ti content and the decrease of Mn content, the graphitization degree of coke decreased according to Raman spectrum.

中文翻译：

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钨极惰性气体熔覆制备的Ti-Mn涂层及其抑制结焦性能

采用钨极惰性气体（TIG）技术在310S钢表面制备了不同比例的Ti-Mn熔覆层，以抑制乙烯裂解中的焦化，并通过马弗炉在800℃下氧化10 h。在850°C下用轻石脑油对不同Ti-Mn粉末比的氧化样品进行焦化评估试验。结果表明，在Ti与Mn的比率为3：1，氧化钛的保护层₂ -Ti _Ñ ø _2n-1个-Mn ₅ Ò ₈试样表面形成了Fe-Ti尖晶石，并且随着Ti元素含量的减少而出现不稳定的Fe-Ti尖晶石化合物。当Ti与Mn的比例为1∶3、1∶2和1∶1时，结焦抑制率分别为40％，46％和59％。催化焦炭在涂层表面形成。当Ti与Mn的比率为3∶1时，涂层表面的抑制焦化率达到80％，并且抑制焦化性能最佳，从而抑制了Fe和Ni金属颗粒的催化焦化。随着Ti含量的增加和Mn含量的减少，焦炭的石墨化程度根据拉曼光谱而降低。