Precision screw cleaning agents can be classified according to their chemical properties. The selection of emulsified cleaning agent usually depends on the effectiveness of the next process, and the oil film containing antirust agent Can be retained on precision screws. Alkaline cleaning agent is used to clean corrosive dirt. It is considered to be effective for quenching oil after heat treatment.
Let's share the cleaning agents used to remove oil stains from
precision screws:
1. Soluble emulsified detergent
Soluble emulsifiers usually contain soil, solvents, emulsifiers, detergents, corrosion inhibitors and a small amount of water. The function of water is to dissolve the emulsifier. The cleaning agent can dissolve the dirt on the surface of
precision screws and leave an antirust film on the surface. The emulsifier and detergent can grasp the oil particles and dissolve them into the cleaning agent containing solvent and oil. Emulsified detergent is a concentrated pure oil product, which becomes a white emulsion liquid after being diluted in water.
2. Synthetic cleaning agent
Synthetic cleaning agent is different from standard alkaline cleaning agent in chemical composition. It is also an alkaline cleaning agent. The standard alkaline cleaning agent is essentially inorganic, while the synthetic agent is an organic agent containing amino substances. These products are designed to remove alkaline residues in single-stage cleaning and are also a good rust inhibitor. Synthetic cleaning agents are used for moderately difficult cleaning, such as quenching oil or quenching polymer solution for cleaning the surface of
precision screws.
3. Alkaline cleaning agent
Alkaline cleaning agent is prepared by mixing alkaline earth metal salts of detergent and surfactant. It is a widely used cleaning agent. The starting point of adding each salt and surfactant is mainly to ensure the cleaning effect, followed by economy. The pH value of cleaning agent is required to be about 7. The cleaning components of such cleaning agents are hydroxides, silicates, carbonates, phosphates, borates and organics.
4. Acid cleaning agent
Acid cleaning agent is not an effective method to clean the general dirt on
precision screws. Alkaline cleaning agent is usually used. Acid cleaning is very effective for oxide skin and other special attachments. The famous process is acid leaching. In addition to the oxide layer of rolling, welding and heat treatment, surface oxides, rust and corrosion products that affect the quality of electroplating or oil seal, as well as water-borne sediments can be removed by acid. Sulfuric acid, hydrochloric acid, nitric acid, citric acid, acetic acid and other organic acids are usually used. For high-strength precision screws, the first three cleaning processes are mainly used at present, but the corrosion of hydrogen should be prevented. The acid agent shall contain base acid, corrosion inhibitor to prevent corrosion on the surface of precision screw, and surface activator to improve cleaning ability.
