Estudio comparativo del poder lubricante y estabilidad oxidativa entre el aceite de ajonjolí y aceite mineral 360

Abstract

A comparative study of the lubricant properties and oxidative stability of sesame oil and a mineral oil, without additives is presented. The superior power of vegetable oil lubricant compared to that of mineral oil was verified by preventive wear tests and extreme pressure in a four-ball tribometer. According to atomic absorption test, there are traces of metals in the areas that are in contact with the sesame oil during the development of the preventative wear test. These particles catalyze the oxidation of the oil during the differential scanning calorimetry test, decreasing the oxidation starting temperature. The preventive wear test partially degraded the sesame oil and increased the peroxide value. This change in the oil was not possible to find by Fourier transform with infrared spectroscopy and acidity. The stability of the mineral oil is superior to that of the vegetable oil.