The pour point of a lubricant is the lowest temperature at which it can still flow or pour. It is an important property of lubricants, especially those used in cold climates or in applications where cold start-up or operation is critical.
The pour point of a lubricant depends on its composition and intended use. Lubricants of different compositions have different pour points, so it is not possible to provide a general figure.
For general lubricants, their pour point is usually about 5-10 degrees Celsius at room temperature. However, for some specific application scenarios and environments, such as high temperature, high humidity, etc., the pour point of the lubricant may be slightly different.
Ideally, the pour point of the lubricant should be significantly lower than the lowest operating temperature expected to be encountered. This ensures that the lubricant remains fluid enough to flow and distribute over the target surface, even at extremely low temperatures.
A low pour point is achieved by selecting or formulating a lubricant with a base oil that has a naturally low pour point and using appropriate additives to further improve its low temperature performance. These additives may include viscosity index improvers, pour point depressants, and antiwear agents.
It is important to note that pour point is a specific property determined by testing according to recognized standards such as ASTM D5950 or ISO 3016. The exact pour point requirements will depend on the specific application and operating conditions, and lubricant manufacturers provide specifications and recommendations based on these requirements.
Therefore, when selecting a lubricant, you should choose a suitable lubricant according to the specific application scenario and environment, and check whether its composition and pour point meet the requirements. If a higher or lower pour point is required, consider using other ingredients or special treatments to adjust the lubricant’s properties.