1) It should be fully soluble in water
2) Are stable compounds
3) Strong ability to dissolve and saponify oil
4) Can gelatinize to remove grease
5) Can prevent the elimination of oil flocculation, can make it into dispersed fine particles
6) Buffer against changes in pH value
7) Easy for further cleaning
8) It will not cause excessive dissolution of the metal matrix
9) When using hard water, some salts dissolved in water will not be precipitated out on the treated surface
10) Cheap prices
The above requirements are very difficult to meet in the round, but it is OK to be able to achieve basically, some conditions can be solved through all sorts of technology or equipment measures.
Oil removal methods can be divided into alkaline, neutral and acid method.
In general, the oil on the surface of the aluminum profile can be divided into saponifiable oil and unsaponifiable oil. The former refers to the formation of soap oil and alkali action: such as moving, vegetable oil, hands, grease on the face, etc., this kind of oil more alkaline in addition to the oil method. Unsaponifiable oil refers to mineral oil, petroleum jelly, etc. It is best to remove this kind of oil with acid oil removal method or organic oil removal agent.
Deoiling must be thoroughly and clean to ensure uniform corrosion on the surface of the aluminum profile in the etching and washing process, so as to achieve the purpose of improving the quality of products.
