Lubricant cleanliness


Mechanical impurities and moisture, ash, and residual a […]

Mechanical impurities and moisture, ash, and residual ash are quality indicators that reflect the purity of the oil, reflecting the cleanliness of the oil. Lubricant cleanliness, also known as solid particle contamination or particle size, is an indicator of the amount or distribution of solid particulate contaminants in the oil to characterize the cleanliness of the oil during production or operation. The cleanliness of lubricating oil is mainly to detect the content and distribution of particulate matter in the diameter of the oil. The purpose of the test is to monitor some of the most demanding oils.

The production of solid particulate contaminants in oil occurs mainly during production, storage, transportation and use. Contamination in the production of oil is caused by several reasons. The raw materials themselves are not clean. The base oils and additives used in hydraulic oils generally have no cleanliness control. Usually, only the mechanical impurities of the base oil and additives are controlled at the factory, and the control of mechanical impurities is far from the control requirement of high cleanliness. Macromolecular liquid particles such as viscosity index improvers, pour point depressants, antifoaming agents, and demulsifiers also have a direct impact on cleanliness. Impurity particles are introduced during the production process. It is inevitable to have some particulate impurities in the package. Poor control of this part of the packaging process will have a relatively large impact on the cleanliness of the product.

The damage of solid pollution particles to the hydraulic system mainly causes the pollution of the components, causing the components to jam, accelerating the performance degradation of the oil, and accelerating the corrosion of the components in the oil.