How to remove residual oil on the surface of cold heading products
Time:
2024-01-25
There is no good method for cleaning, but it mainly focuses on cleaning the surface of fasteners after quenching in cooling residual oil and heat treatment oil during cold heading or cutting processing.
There is no good method for cleaning, but it mainly focuses on cleaning the surface of fasteners after quenching in cooling residual oil and heat treatment oil during cold heading or cutting processing.
1. Alkaline water cleaning method
The main drawback of alkaline water cleaning method is that the cleaning effect is not very good, especially the blind holes and grooves of fasteners are prone to stains and residues. The wastewater generated from alkaline water cleaning must be neutralized and the waste oil must be recovered to meet relevant environmental requirements before discharge.
2. Metal cleaning agent cleaning method
The disadvantage of metal cleaning agent cleaning methods is that they are expensive and have an unpleasant odor, which has a certain corrosive effect on fasteners and pollutes the environment with wastewater. Therefore, it is necessary to treat wastewater and recover waste oil.
3. Organic solvent cleaning method
The best cleaning effect is achieved using trichloroethane and trichloroethylene.
4. Combustion defatting method
For fasteners that require high surface cleanliness, such as aviation bolts and automotive engine connecting rod bolts, advanced cleaning techniques such as vacuum or ultrasonic are currently used to replace commonly used solvents containing chlorinated hydrocarbons that have a destructive effect on the atmospheric ozone layer. This can achieve efficient and environmentally friendly cleaning.
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Wenzhou Bridge Industrial Park, Yueqing City, Zhejiang Province (North White Elephant)
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