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首页> 外文期刊>Tribology International >X-ray absorption near-edge structure analysis of the chemical environment of zinc in the tribological film formed by zinc dialkyl dithiophosphate decomposition on steel
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X-ray absorption near-edge structure analysis of the chemical environment of zinc in the tribological film formed by zinc dialkyl dithiophosphate decomposition on steel

机译：钢中二烷基二硫代磷酸锌锌分解形成的摩擦膜中锌化学环境的X射线吸收近缘结构分析

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Calculation of X-ray absorption near-edge structure (XANES) has been used to investigate the chemical nature of zinc in thermal films formed on the surfaces of steel coupons by the additive zinc dialkyl dithiophosphate (ZDDP) in oil solution. Carbon K, oxygen K, and zinc L edge XANES spectra were used to characterize the thermal films and a model film formed by addition of cumene hydroperoxide (CHP) to the ZDDP. Thermal films formed by heating at up to 100℃ for 5 h showed little change from unreacted ZDDP. At 160℃ for 5 h, the ZDDP underwent thermal solution decomposition with similarities to the oxidation induced by CHP. The Zn L edge XANES spectra were compared to calculated spectra of the model surface species ZnO and ZnS in the wurtzite structure and ZnS in the zinc blende structure. Agreement between experiment and simulation is found for the 160℃ thermal film with a roughly two monolayer film of ZnO and for oxidation by CHP with a three to four monolayer film of ZnS.
机译：X射线吸收近边缘结构（XANES）的计算已用于研究油溶液中添加剂二烷基二硫代磷酸锌（ZDDP）在钢样块表面形成的热膜中锌的化学性质。碳K，氧K和锌L边缘XANES光谱用于表征热膜和通过向ZDDP中添加氢过氧化枯烯（CHP）形成的模型膜。与未反应的ZDDP相比，在高达100℃加热5小时形成的热膜几乎没有变化。在160℃下5 h，ZDDP经历了热溶液分解，与CHP诱导的氧化相似。将Zn L边缘XANES光谱与纤锌矿结构中的模型表面物种ZnO和ZnS以及锌共混物结构中的ZnS的计算光谱进行比较。实验结果表明，在160℃的热膜中约有两层ZnO单层膜，在热电联产中通过三到四层的ZnS单层膜进行了热氧化。

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