During use and storage, oil will come into contact with oxygen in the air. Under certain conditions, it will undergo chemical changes and produce new oxidation products such as acids and gums.
These oxidation products accumulate in the grease, causing changes in the appearance or physical and chemical properties of the lubricating grease, such as darkening of the color, increased viscosity, and greater acidity, and there will be sludge deposits that will make the lubricating grease lose its original excellent physical and chemical properties. performance.
Such a chemical reaction is called oxidation or aging and cracking of oils and fats.
The reasons that affect the oxidation of lubricating grease are:
1. The chemical composition of lubricating grease and the proportion of these components in the grease.
2. Temperature.
3. Adequate contact with oxygen in the air.
4. Oxidation time.
5. Catalysis of metals and other substances.
6. Other factors.
