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How to deal with the oil on the surface of the screw?

2021-09-21 12:00:00

Alkaline cleaning agent

Alkaline cleaning agent is made by mixing detergent and alkaline earth metal salt of surfactant. It is a widely used cleaning agent. The starting point for adding each salt and surfactant is to ensure the cleaning effect first, and then economical. The pH value of the cleaning agent should be controlled at 7. The cleaning ingredients of this type of cleaning agent are hydroxides, silicates, carbonates, phosphates, borates, and organic chemicals. Alkaline detergent hydroxide can provide the highest alkalinity and is relatively cheap. A small amount of addition can have satisfactory alkalinity and conductivity, which is very important for electrolytic cleaning and saponification. The disadvantage is that it is difficult to rinse, and the non-saponified scrubbing effect of dirt is poor. The pH value of a 1% solution can reach 1.3. Alkaline cleaning fluid can be sodium salt or potassium salt, mainly used for cleaning steel alloy screws.

pp screw

2. Acid cleaning agent

It is not a useful method to use acidic cleaners to eradicate the usual dirt on precision screws. Alkaline cleaners are usually used. It is very useful for cleaning oxide scale and other special attachments with acid. The most famous technique is acid leaching. In addition to rolling, welding and heat treatment oxide scale, surface oxides, rust and corrosion products that affect the quality of electroplating or oil seals, and water-stained deposits can all be removed with acid. Commonly used are sulfuric acid, hydrochloric acid, nitric acid, citric acid, acetic acid and other organic acids. For the dephosphorization of high-strength precision screws before heat treatment, the first three cleaning techniques are now the first to be used, but hydrogen corrosion should be prevented. The acidic agent should be rich in basic acid and corrosion inhibitor to prevent corrosion of the surface of precision screws, as well as surfactants that can advance the eradication ability. pp screw

3. Soluble emulsifying cleaning agent

Soluble emulsifiers are usually rich in soil, solvents, emulsifiers, builders, corrosion inhibitors and a small amount of water. The effect of water is to dissolve the emulsifier, the cleaning agent can dissolve the dirt on the surface of the precision screw, and it can also leave an anti-rust film on the surface. The emulsifier and scrubbing agent in the process can hold the grease particles and dissolve them into the cleaning agent rich in solvents and oils. Emulsified cleaning agent is a concentrated pure oil product, which becomes a white milky liquid after being diluted in water.

4. Constitutive cleaning agent

The composition cleaning agent is different from the standard alkaline cleaning agent, the difference lies in the chemical composition, which is also an alkaline cleaning agent. The standard alkaline cleaning agent is essentially inorganic, while the constituent agent is an organic agent containing amine-based substances. This type of product is planned to be used to eradicate alkaline residues in single-stage cleaning and is still a good rust inhibitor. The composition cleaning agent is used for medium-difficult cleaning, such as quenching oil or quenching polymer solution for cleaning the surface of precision screws. Hinge screw

5. Detergent

Decontamination cleaning agents are mainly rich in solvents, surfactants and water. Unlike emulsified cleaning agents, it is a pure solution, not an emulsion.



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