What is the effect of extreme pressure Antiwear Additive on composite aluminum base grease? Extreme pressure antiwear additive is an important grease additive, most of which are compounds containing sulfur, phosphorus, chlorine, lead, and molybdenum. Under normal circumstances, chlorine and sulfur can improve the load bearing capacity of grease and prevent sintering, seizure and scratching of metal surfaces under high load conditions; phosphorus and organic metal salts have higher wear resistance Ability to prevent or reduce the wear of metal surfaces under medium load conditions.
What are the effects of extreme pressure antiwear additives on composite aluminum base grease? 1. The influence of extreme pressure anti-wear agent on copper corrosion of composite aluminum-based grease Copper sheet corrosion is an index to evaluate the corrosive effect of grease on copper and other non-ferrous metals. Although it has little correlation with actual dynamic conditions, it has a certain correlation with corrosion generated in static conditions. Especially extreme pressure grease must be subjected to copper corrosion test. Therefore, a certain amount of copper Corrosion Inhibitor is often added to the extreme pressure grease. The corrosion inhibitor is adsorbed on the metal surface to compete with the extreme pressure antiwear agent. The compatibility of the two is very important. Through the compatibility of extreme pressure agents and anticorrosive agents, the contradiction between extreme pressure and corrosion resistance can be effectively resolved. 2. The influence of extreme pressure anti-wear agent on the rust prevention of composite aluminum-based grease bearings Although the grease itself can adhere to the metal surface, it generally has poor rust resistance. Especially the composite aluminum-based grease has small fibers, strong water repellency, and poor adhesion, which often cause bearing erosion. For this reason, it is necessary to choose a suitable ferrous metal Anti-rust agent and the added amount is larger than other greases. 3. The influence of extreme pressure anti-wear agent on the evaporation of composite aluminum-based grease The amount of evaporation is the part of the grease that volatilizes when the grease is used for a long time under high temperature conditions. It is mainly determined by the nature of the Base Oil and the composition of the distillate in the grease. Evaporation is one of the factors that affect the service life of grease, especially grease used under high temperature lubrication or high vacuum conditions. If the evaporation loss of the grease is too large, the grease will thicken and the internal friction will increase, which will cause the lubrication to dry up and shorten its service life. The composite aluminum-based grease has extremely strict requirements on the evaporation rate.
