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Modeling of reactive kinetics in the metal surface contaminant cleaning using atmospheric pressure plasma arc

机译：使用大气压等离子体电弧清洁金属表面污染物中的反应动力学建模

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摘要

Atmospheric pressure plasma arc (APPA) cleaning is a newly developed method of metal surface cleaning. In this paper, a mathematical model of reactive kinetics in the metal surface contaminant cleaning using APPA has been developed. Based on the analysis of APPA cleaning mechanism and the feature of cleaning interface, a governing equation was established with heat transfer equation and energy conservation on the moving interface. Using fourth-order Rounge-Kutta method, above equation was solved and removal percentages of the cleaning contaminant at different time were obtained. In virtue of reactive kinetics theory, a reactive kinetics model of metal surface cleaning using APPA was established on the base of above calculation results. Afterwards, reactive kinetics parameters such as activation energy and pre-exponential factor were calculated. Cleaning lubricant was taken as an example, the results indicated that predictive values of lubricant removal percentages gotten from this established reactive kinetics model show good consistent with experimental data at the same time. Furthermore, the ambient temperature on the cleaning lubricant surface affects the removal rate strongly. The removal rate increases with the increase of the ambient temperature. To avoid the damage of metal substrate surface because of higher temperature and ensure the removal rate of the lubricant, the appropriate temperature which lies between the lubricant decomposition temperature and damage temperature of metal substrate under given calculation conditions should be determined.
机译：大气压等离子弧（APPA）清洁是一种新开发的金属表面清洁方法。在本文中，开发了使用APPA清洁金属表面污染物的反应动力学数学模型。在分析APPA清洗机理和清洗界面特性的基础上，建立了带有传热方程和运动界面能量守恒的控制方程。使用四阶Rounge-Kutta方法求解上述方程式，并获得不同时间的清洁污染物去除率。根据反应动力学理论，在上述计算结果的基础上，建立了应用APPA清洗金属表面的反应动力学模型。之后，计算反应动力学参数，例如活化能和指数前因子。以清洁润滑剂为例，结果表明，从建立的反应动力学模型得到的润滑剂去除率的预测值与实验数据吻合良好。此外，清洁润滑剂表面上的环境温度强烈影响去除速率。去除率随着环境温度的升高而增加。为了避免由于较高的温度对金属基材表面造成损坏并确保润滑剂的去除率，应确定在给定的计算条件下润滑剂分解温度与金属基材的损坏温度之间的适当温度。

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