How to deal with oil pollution of precision screws?

Publish time: 09 Feb 22

1. Soluble Emulsion Cleaner

Soluble emulsifiers typically contain soil, solvents, emulsifiers, cleaners, corrosion inhibitors and a small amount of water. The role of water is to dissolve the emulsifier. The cleaning agent can dissolve the dirt on the surface of the fine screw and leave a rust-proof film on the surface. Emulsifiers and detergents can hold oil particles and dissolve them in detergents containing solvents and oils. Emulsion Cleaner is a concentrated pure oil product that becomes a white emulsion when diluted with water.

2. Composition of the cleaner

The difference between a make up detergent and a standard alkaline detergent is the chemical composition, which is also an alkaline detergent. Standard alkaline detergents are basically inorganic, and the ingredients are organic reagents that contain amino species. This product is designed to remove alkaline residue from single-step cleaning and is also a better rust inhibitor. The composition cleaner is used for moderately difficult cleaning, such as cleaning the surface of thin screws with quenching oil or quenching polymer solutions.

3. Alkaline cleaner

Alkaline detergents are widely used detergents, which are made from alkaline earth metal salts of detergents and surfactants. The starting point for adding each salt and surfactant is to ensure cleanliness first and economy second. The pH of the detergent is required to be around 7. The cleaning components of this cleaner are hydroxides, silicates, carbonates, phosphates, borates and organic compounds.

Hydroxides can provide high alkalinity and relatively low cost. A small amount of additives can satisfy alkalinity and conductivity, which are very important for electrolytic cleaning and saponification. The disadvantage is that it is difficult to rinse off and the unsaponifiable washing effect of the soil is not good. The pH of a 1% solution can reach 1.3. Alkaline cleaning solution can be sodium salt or potassium salt, mainly used for cleaning alloy steel precision screws.

4. Pickling agent

Using acidic cleaners to remove general dirt from fine screws is not a useful method, but alkaline cleaners are usually used. Very useful for pickling of scale and other special attachments. A well-known process is acid leaching. In addition to rolled, welded and heat treated oxide coatings, surface oxides, rust and corrosion products, and aqueous deposits that affect plating or oil seal quality can be removed by acid. Commonly used are sulfuric acid, hydrochloric acid, nitric acid, citric acid, acetic acid and other organic acids. Currently, the first three cleaning processes are the most important for dephosphorization prior to heat treatment of high-strength thin screws, but hydrogen corrosion should be avoided. The acid should contain an alkaline acid and a corrosion inhibitor to prevent corrosion of the fine screw surface, and a surfactant to improve removal.

5. Stain remover

Detergents mainly contain solvents, surfactants and water.