Physical Properties

Oil separation detection

Definition: Grease steel mesh oil separation refers to the tendency of base oil to separate from grease under heated conditions, indicating the quality of the grease’s colloidal stability when subjected to heat. ① Steel mesh oil separation is an important indicator of colloidal stability, which can predict changes in the structural framework of grease under…

Volatility detection

Definition: Grease volatility (evaporation loss) refers to the degree of evaporation loss of base oil in grease under high-temperature conditions. ① The smaller the evaporation loss, the better the high-temperature performance of the grease. ② Grease evaporation loss depends on the type, properties, and distillation composition of the base oil used in the grease. ③…

Cone penetration detection

Definition: Penetration refers to the depth, in units of 0.1 mm, that a standard cone freely falls and penetrates into grease contained in a standard cup within 5 seconds. Penetration indicates the consistency or the degree of softness/hardness of the grease.     Standard Cone Sizes for Penetration Testing: Full-size cone penetration 1/2 cone penetration…

Drop detection

Definition: The dropping point of grease is the temperature, expressed in degrees, at which the first drop of grease sample drips from the grease cup in a dropping point apparatus. This temperature is known as the dropping point of the grease.     Key Points: ① The dropping point is an indicator of the thermal…