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Your location: Home > Related Articles > Meaning of using the lubricating grease water spray resistance tester

Meaning of using the lubricating grease water spray resistance tester

Author:QINSUN Released in:2023-04 Click:94

1. Grease with good water resistance ensures that the grease can still play a good lubricating role in the presence of water, while greases with poor water resistance are not suitable for parts that come into contact with water. For example, the continuous casting process in the steel rolling industry is characterized by the fact that a large amount of cooling water is sprayed directly onto the red-hot steel billet. At that time, not only a large amount of water enters the bearing, but a large amount of water vapor is also generated and present on the bearing surface. Grease It is always in a state of high temperature and high humidity. If the water resistance of the grease is not good, it will be easily washed off and lostzen are smoothness.

For most parts used, the grease must have good water resistance. However, the requirements of some parts of the use are opposite. For example, the lubricating grease used on knitting machines and sewing machines is often expected to be water-soluble; Grease with good water quality is not easy to wash off oil stains. Therefore, we must be flexible in the specific selection of fat.

2. Moisture and water resistance of grease

Fat itself contains water, which can be divided into two types. One is the structure containing water. At present, water is the stabilizer in the fat, which has an important influence on the formation and properties of the fat structure. The another is free water, which is undesirable in lubricating grease and should be limited.But the water resistance of lubricating grease refers to the object, and water comes from the outside.Water resistance means that the lubricating grease is insoluble and insoluble in the water introduced from the outside.The ability to emulsifiable, not easy to absorb water from the surrounding medium, not washed off by water, and not significantly changing its own properties when in contact with water.

The water resistance of lubricating grease mainly depends on the thickener, followed by the base oil. In general, the water resistance of silicone oil based grease is better, followed by mineral oil and ester oil. resistance of polyether oil is poor For thickeners, urea-based grease and hydrocarbon-based grease have the best water resistance, aluminum-based grease, barium-based grease, calcium-based grease and composite aluminum, composite barium and composite calcium. The base grease comes next, followed by lithium-based grease, and the worst water resistance is sodium-based fat and complex sodium-based fat.

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