Coating pretreatment on all kinds of heat treatment, mechanical processing, transportation and storage process, inevitably will be oxidized, create a layer thickness of oxide layer. At the same time, are also susceptible to various oil pollution and adsorption of some other impurities.
Oil and some of the adsorbate, thin oxide layer can be successively solvent detergent
cleaning, chemical processing and mechanical processing, or directly with chemical treatment. For severe oxidation of the metal surface, the oxide layer thicker, can't direct solvent cleaning and chemical treatment, and the best mechanical processing first.
Usually after processing, the metal surface with high activity, again more easily polluted by dust, moisture, etc. To this end, after processing of metal surface should be done as fast as possible to connect.
Coating pretreatment including skim (except oil), derusting, phosphating three parts. Phosphate is the key link, in addition to the oil and rust removal was prepared before phosphating process, so in production practice, both to the phosphating work, as the key, and the requirement of phosphating quality, pays special attention to the oil removal and cleaning work, pay particular attention to the mutual influence between them.
But with the development of the industry, environmental protection and the improvement of working conditions have become the common concern of the people. Therefore, when choosing reagents should consider the need of environmental protection. So jun he shares the coating pretreatment products configuration is simple, strong decontamination, excluding difficult cleaning under normal temperature, normal temperature water easily, do not contain toxic substances, does not produce harmful gases, good working conditions.