Increasing environmental awareness and threats to the environment have made the recycling of biomass products necessary. The goal of this paper is to study the tribological properties of fatty acid methyl esters derived from waste frying oils under different lubrication conditions. For this purpose, the performance of candidate fatty acid methyl esters was compared with a mineral base oil. For the determination of tribological properties, a pin-on-disc wear tester was used. The experiments were carried out in three replications at different loads (5, 10, and 15 N) and different sliding speeds (100, 300, and 600 r/min) and a 1000 m sliding distance under dry, boundary-mixed, and fluid lubrication conditions. After the wear amount of the test specimens was determined by the mass loss method, their Archard wear indexes were calculated. Scanning electron microscopy surface images were used for visual analysis and energy-dispersive X-ray spectroscopy images for chemical analysis. The surface contact angles and surface tensions of the lubricant test specimens were also measured experimentally. In all experimental results, it has been found that the tribological properties of used frying oil fatty acid methyl esters such as friction, wear, and surface adhesion are generally better than the base oil under all lubrication conditions. Fatty acid methyl esters is a biodegradable, recycling, and environmentally friendly product and can be confirmed as a lubricant and/or an oil additive candidate.

环保意识的增强和对环境的威胁使生物质产品的回收成为必要。本文的目的是研究在不同润滑条件下由废煎炸油衍生的脂肪酸甲酯的摩擦学性能。为此，将候选脂肪酸甲酯的性能与矿物基础油进行了比较。为了确定摩擦学性能，使用了针盘式磨损测试仪。在不同的载荷（5、10和15 N）和不同的滑动速度（100、300和600 r / min）下以及在干燥，边界混合和流体条件下滑动距离为1000 m的情况下，进行了三次重复实验润滑条件。用质量损失法测定试样的磨损量后，计算出阿卡德磨损指数。扫描电子显微镜表面图像用于视觉分析，能量色散X射线光谱图像用于化学分析。还通过实验测量了润滑剂测试样品的表面接触角和表面张力。在所有实验结果中，已经发现，在所有润滑条件下，用过的煎炸油脂肪酸甲酯的摩擦学性能，例如摩擦，磨损和表面粘附性通常都优于基础油。脂肪酸甲酯是一种可生物降解，可回收利用且对环境友好的产品，可以被确认为润滑剂和/或油添加剂的候选者。还通过实验测量了润滑剂测试样品的表面接触角和表面张力。在所有实验结果中，已经发现，在所有润滑条件下，用过的煎炸油脂肪酸甲酯的摩擦学性能，例如摩擦，磨损和表面粘附性通常都优于基础油。脂肪酸甲酯是一种可生物降解，可回收利用且对环境友好的产品，可以被确认为润滑剂和/或油添加剂的候选者。还通过实验测量了润滑剂测试样品的表面接触角和表面张力。在所有实验结果中，已经发现，在所有润滑条件下，用过的煎炸油脂肪酸甲酯的摩擦学性能，例如摩擦，磨损和表面粘附性通常都优于基础油。脂肪酸甲酯是一种可生物降解，可回收利用且对环境友好的产品，可以被确认为润滑剂和/或油添加剂的候选者。