What are the methods of degreasing workpiece?

Oil, alkaline solution and detergent can all wash away oil, but the principle is different, gasoline dissolves oil, while detergent emulsifies oil.

Alkaline solutions rely on chemical reactions.

The degreasing of detergent depends on emulsification, the degreasing of gasoline depends on dissolution, and the degreasing of alkaline solution depends on chemical reaction.

Degreasing method: lye degreasing.

Electrode-oiled. Cleaning equipment: ultrasonic cleaning.

machine, spray cleaning machine, hydrocarbon cleaning machine, vacuum cleaning machine.

The principle of the washing machine: electrical energy is converted into mechanical energy.

It becomes the washing power to the workpiece cleaning.

The five elements of degreasing: contaminants (oil), cleaning liquid, cleaning machine, cleaning time, cleaning temperature.

Oil cleaning on metal surfaces has always been a big problem in the production and operation of factories, and many factories have been interrupted due to improper maintenance of metal equipment, which affects the performance and profits of manufacturers. In the processing process, the workpiece will have a variety of oil stains, if these oil stains are not cleaned, it will affect the progress of the next process, so it is necessary to use the grease and dirt on the surface of the workpiece to clean.

There are three main methods for degreasing workpieces: ultrasonic cleaning, organic solvent cleaning, and scrubbing.

1. Ultrasonic cleaning.

The use of water-based cleaning agent cleaning, with ultrasonic cleaning machine** to produce a large number of small bubbles in the solvent, these small bubbles in the formation, growth and precipitation of a strong mechanical force, to promote the surface of the workpiece adhesion of grease, dirt quickly separated, so as to speed up the cleaning process, shorten the cleaning time, so that the degreasing more rapid and thorough.

Ultrasonic cleaners must be used with industrial degreasers, which are complex mixtures of organic and inorganic chemicals based on water. It has a wide range of uses in metal processing, food, textile, transportation, shipbuilding, construction, electrical appliances, medicine, chemical and other industrial fields.

2. Organic solvent degreasing.

Organic solvent degreasing is to use the principle of "homogeneous miscing" to remove oil stains on the surface of parts. However, some greedy and cheap enterprises will use kerosene and trichloroethylene to clean the oil stains on the surface of the workpiece.

White electric oil, heavenly water.

Trichloroethane and other cleaning, but these cleaning agents will not only cause serious ecological pollution, but also affect the health of operators.

3. Scrubbing. Use a rag to scrub the oil, soak it in the cleaning solvent, and then scrub the surface of the workpiece to remove the dirt and grease on the surface, this method requires manpower and is more time-consuming, and is generally not recommended.

When degreasing metal surfaces, spraying is generally used. For metal workpieces, due to their special shape, they can be soaked in Rongxiang degreaser, so how to operate?

Workpiece degreasing method:

1. Degreasing in the processing industry: dilute the degreaser 1:10 with water, then soak the workpiece in the diluted solution, soak for 10 30 minutes, remove it and rinse it with water. When the effect decreases, you can add another 5% to 10% to continue to use.

2. Degreasing of metal parts: mix 5 10 times with water according to the oil stains, soak for 5 20 minutes, remove and clean with water.

Precautions for use:

1. This product is a water-based cleaning agent, and the power supply should be cut off before using water equipment and electrical equipment.

2. When used for soaking, the oil stains floating or precipitating in the tank should be cleaned in time, and if the tank liquid is seriously polluted, the tank should be replaced.

3. Be careful not to get it in your eyes during use. In case of contact with eyes, rinse immediately with water.

4. Store at room temperature and avoid sun exposure.

The cleaning of oil stains on the metal surface has always been a big problem in the manufacturing industry, and many factories have been interrupted due to improper maintenance of metal equipment, which has affected the performance and profits of enterprises. A large part of the reason for this is that enterprises do not understand the maintenance of metal equipment and do not know how to carry out correct cleaning and maintenance. So, what are the cleaning methods for oil stains on metal surfaces?

Due to the addition of ultrasonic, the solvent is produced, which accelerates the dissolution or detachment from the surface, and the degreasing efficiency is high, and the quality is better than that of simple solvent and chemical degreasing method, but the cost is high.

Ultrasonic waves are added to the degreasing unit by immersion method or electrochemistry.

It is suitable for workpieces that are difficult to degreas, especially some parts with complex shapes.

1. Fast speed, can quickly dissolve two types of grease, does not corrode the workpiece, and the degreasing is not complete; Solvents are toxic, flammable, and costly.

2. The acid and alkali chemical medium used is low in cost and simple in equipment, but the soaking time is long and the efficiency is low.

Operation at room temperature, saving energy, good degreasing effect, but some surfactants are more expensive, and the degreasing cost is higher. There are many types of surfactants, and their properties vary.

Use a variety of degreasing cleaners such as detergents, detergents and liquid soaps.

It is suitable for degreasing all kinds of workpieces, and the key is to choose the type of surfactant.

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The main ones are as follows:

Chemical degreasing. Electrode-oiled.

Drum degreasing. Organic solvent degreasing.

Wipe to remove oil. Ultrasonic degreasing.

Spray to remove oil. The above are all popular ways to remove oil.

You can wash it in detergent or rub it in soil.

In principle, it can be divided into physical methods, chemical methods and biological cleaning methods.

Physical methods: such as mechanical friction, ultrasonic, negative pressure, high pressure, impact, ultraviolet rays, steam, etc., as well as cleaning methods of simple physical dissolution to remove dirt on the surface of objects.

Chemical method: It is to remove dirt by reacting, dissolving, emulsifying, dispersing and adsorbing chemical raw materials.

Biological cleaning: It is the use of enzymes and microorganisms to transform the oil and other dirt attached to the surface of the equipment into non-toxic and harmless water-soluble substances.

The methods you are talking about include solvent cleaning, surfactant cleaning, pickling cleaning, alkaline cleaning, etc.

The degreasing method includes what degreasing and degreasing methods are used. The first is to see what kind of oil to remove, the second is to use what way to remove the oil, and the third is to choose the appropriate degreaser, because there are many types of oil, and the effect of different degreasers is not the same. Specifically, look at the "paraffin oil high-efficiency cleaning agent, rubber oil cleaning agent, multi-functional degreasing powder, animal and vegetable oil cleaning agent" and so on to see which one is applicable.

1. Alkali substances have a good effect on removing saponified oils, which are divided into two categories: strong alkali and weak alkali

2. Surfactants, the oil stains on the surface of the workpiece are often mostly mineral oil (such as standard parts, machined protective oil, etc.), and they do not have saponification reaction with alkalis, and it is difficult to remove them directly with alkalis, and can only be removed by the emulsification of surfactants.

3. Degreasing of other chemicals.

It mainly depends on what method is suitable for you to remove oil. **There are a variety of metal degreasing cleaners to choose from in the "Yunyang Daily Chemical" store.

Mechanical scrubbing, tumbling degreasing, chemical degreasing, electrochemical degreasing, ultrasonic degreasing, organic solvent degreasing, etc.