The temperature has a great influence on the fluidity of the grease. When the temperature rises, the grease becomes soft, which reduces the adhesion of the grease and makes it easy to lose. In addition, it is easy to increase the evaporation loss, oxidation deterioration and oil separation of lubricating grease at higher temperatures. Lubricating grease with good high-temperature performance can maintain its adhesion at a higher service temperature, and its deterioration and failure process is also slow.
The main indexes for evaluating the high temperature property of lubricating grease are dropping point, evaporation and leakage.
The dropping point of the grease is the low temperature at which the grease reaches a certain fluidity under the specified test conditions. It mainly depends on the type and content of thickener. The higher the drop point, the better the heat resistance of the grease.
The evaporation amount of lubricating grease refers to the percentage of lubricating grease mass loss caused by evaporation under specified test conditions. The evaporation amount of lubricating grease mainly depends on the type of base oil, fraction composition and molecular weight. The amount of evaporation can qualitatively represent the upper limit of grease use temperature.
Another index to evaluate the high-temperature performance of lubricating grease is to measure the leakage of lubricating grease bearing. The greater the leakage, the worse the high-temperature performance of lubricating grease
The above is a detailed introduction to FAW Sihuan Zhixing Lubricant, and I hope it will be helpful to you. If you have any questions, please contact us. We will provide you with professional service https://www.smxnykj.com/