The difference between molybdenum disulfide grease and graphite grease
Although molybdenum disulfide grease and graphite grease are black grease in appearance, the grease product cannot be judged from the appearance alone, and it is necessary to analyze the difference between the two from their physical properties. Molybdenum disulfide and graphite are also used as a high temperature resistant solid additive, but there is a difference between the two.
It is a molybdenum disulfide extreme pressure grease refined by inorganic thickener thickening synthetic oil, and adding molybdenum disulfide solid lubricant and various additives such as anti-oxidation and anti-corrosion. This high temperature and high pressure grease is designed for the lubrication of bearings and moving devices under high temperature, high load / impact load, etc., providing long-term anti-wear and corrosion protection. Applicable temperature range: -30 ～ + 350 ℃.
The addition of molybdenum disulfide to the grease can improve the lubricating ability of the grease. When the lubricating film of the grease is subjected to a brief impact load or high heat, it can play a reinforcing role and act as an extreme pressure additive. In addition, molybdenum disulfide It can thicken the grease, improve the resistance to loss, enhance the sealing and protection, and improve the thermal stability.
Graphite grease is a graphite grease made of inorganic thickener thickened synthetic oil and added with ultra-fine graphite powder, anti-oxidation and anti-corrosion additives. This ultra-high temperature grease will slowly evaporate base oil when the temperature is above 200 ℃, and graphite will adhere to the lubricating surface to form solid lubrication. It is specially used for the lubrication of high-temperature friction components and bearings under heavy load / impact load or wet / polluting environment. Maximum protection against rust and corrosion. Applicable temperature range: -20 ~ +450 ℃, the highest intermittent temperature resistance can reach 500 ° C.
It can be seen that the high temperature resistance of graphite grease is better than molybdenum disulfide grease, and the cost of graphite grease is lower than molybdenum disulfide grease, but why many manufacturers still choose to use molybdenum disulfide grease, The biggest difference between them is that although graphite grease is better than molybdenum disulfide grease in terms of high temperature resistance and low cost, molybdenum disulfide has much better anti-wear, extreme pressure performance and lubrication performance than graphite grease. Therefore, it is best to use molybdenum disulfide grease in environments with harsh, heavy-duty gears and bearings, and parts with impact loads.
The above is the difference between molybdenum disulfide grease and graphite grease.
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