Complex calcium sulfonate thickener has a history of about half a century. Compared with ordinary thickeners, its advantage is that it has extreme pressure performance itself-even if extreme pressure additives are not used, this thickener thickens The resulting grease also has extreme pressure and anti-wear properties, can carry heavier loads, and can also be used to make food-grade grease-suitable for greases that can directly contact food (H-1 food grade).
The pumpability and water resistance of calcium sulfonate complex grease are worthy of our attention. Pumpability refers to whether the grease is easy to cold start and transport at low temperatures. This problem can be solved by selecting the appropriate base oil. In terms of water resistance, the water resistance of calcium sulfonate complex grease is generally good. However, due to the difference of raw materials and production processes, the water resistance of calcium sulfonate grease may be different. Please pay attention to the relevant parameters when purchasing. . For example, in an experiment to test the water resistance of lubricating grease (ASTM D4049), water was sprayed onto a thin layer of grease. After the experiment, the loss of grease (%) was recorded. Some complex calcium sulfonate greases There is more loss after the experiment, and water resistance testing should be paid attention to in selection.
Advantages and uses of complex calcium sulfonate grease
The main advantages of compound calcium sulfonate grease are extreme pressure anti-wear properties and excellent rust resistance. Certain varieties can also adapt to working conditions with metal salt spray to prevent metal corrosion and corrosion.
1. Shear stability
The shear stability/mechanical stability of the calcium sulfonate complex grease is very good, which means that in the process of mechanical extrusion and shear rolling, the calcium sulfonate complex grease can maintain a relatively stable consistency performance, which is not easy Consistency changes and oil leakage occur due to shearing. The shear stability of complex calcium sulfonate grease is better than complex lithium-based grease and polyurea grease.
2. High temperature performance
The compound calcium sulfonate grease has a high dropping point, which can reach over 300 degrees Celsius, and has a long service life at high temperatures and stable properties, so it can be used as a high temperature grease.
3. Extreme pressure and anti-wear performance
Extreme pressure and anti-wear properties are a major advantage of complex calcium sulfonate grease. Lithium complex grease needs to be added with additives to improve extreme pressure performance and anti-wear performance, while complex calcium sulfonate thickened grease, even if no additives are used It already has anti-wear and extreme pressure properties, and can withstand heavy loads. In addition, sulfonate naturally has anti-rust properties, while complex lithium bases do not have such properties, and need to be improved by adding anti-rust agents.
4. Water resistance
In industrial applications, water resistance is an important indicator. The tests to detect water resistance mainly include water splash test (ASTM D4049), water washing test (ASTM D1264), and wet roller test (updated ASTM D1831). Pay attention to grease Related performance testing items and the percentage of loss, the lower the better.
5. Antioxidant
The compound calcium sulfonate thickener has good oxidation resistance and is relatively stable at high temperatures. However, the oxidation resistance depends on the performance of the base oil. Oxidation will cause the grease to deteriorate, and oxidation will accelerate at high temperatures. Therefore, the oxidation resistance will affect the service time and performance of the grease at high temperatures.
Use of complex calcium sulfonate
Due to its excellent performance, complex calcium sulfonate grease has a wide range of uses, and can be used in automobiles (automobile chassis, suspension systems, universal joints, wheel lubrication), agricultural machinery, engineering machinery, food machinery, iron and steel metallurgy, mining, papermaking, Shipbuilding, railway, power generation and other industries, such as continuous casting machine, ball mill, crusher, marine and underwater facilities lubrication.
Dongguan Baoxing Lubricant Co., Ltd. is located in Dongguan, Guangdong. It is one of the outstanding special grease industry leaders.
The company integrates R&D, production, sales, and service marketing to provide various types of special lubricants and greases for Chinese and foreign customers.
