Color differences are a common phenomenon during the storage of grease and can indicate a change in product quality. Understanding the factors that contribute to color aberration and the precautions they take is essential to maintain the performance of the oil and extend its lifespan.
The following are the main reasons for color differences in lubricating grease storage:
Oxidation: Oxygen in contact with grease may trigger an oxidation reaction, resulting in a darkening of the grease.
Light influence: Ultraviolet rays or direct sunlight can accelerate the aging of grease and cause discoloration.
Contaminant involvement: Grease can change color due to exposure to contaminants such as metal, dust, or moisture.
Temperature fluctuations: Extreme or frequent changes in temperature can affect the stability of greases and fats, resulting in color aberrations.
Water mixing: When grease comes into contact with water, it may change color due to hydrolysis reactions.
Improper storage conditions: Improper packaging, improper material of storage containers, or unsuitable storage environment may cause the color of the oil to change during storage.
Proper storage is critical to maintain the quality of the grease, avoid contact with contaminants, etc., to prolong the life of the grease. If the grease exhibits significant color differences, it should be checked for any damage to its properties and properly tested before use.