Before spraying or painting, the surface of metal must be converted to form a conversion film. Conversion coatings include phosphate coatings, passivation coatings, organic coatings, rare earth conversion coatings, and sol silane coatings. Among them, the preparation of phosphating film is to put metal parts into a salt solution containing specific acid phosphates such as Zn, Ni, Mn, Fe, etc., and add various composite additives at the same time. After chemical treatment, the metal parts are A phosphate conversion film with a certain thickness that is difficult to dissolve in water is formed on the surface.
The main purpose of phosphating is to provide protection to the base metal and prevent the metal from being corroded to a certain extent; to be used as a primer before painting to improve the adhesion and anti-corrosion capabilities of the paint film layer; to reduce friction in the metal cold working process Lubricating effect. At present, medium-temperature and high-temperature phosphating are mostly used for phosphating treatment at home and abroad, which not only consumes a lot of energy, takes a long time to process, and contains a lot of sediment, but also requires sealing treatment after phosphating, which complicates the phosphating process and directly affects quality, yield or cost of coating production. At present, the traditional phosphating liquids used for phosphating treatment of steel materials on the market still have many defects, and the performance of the phosphating liquids still needs to be improved in all aspects.
This Medium temperature zinc phosphating solution is suitable for a wide temperature range and has strong corrosion resistance. The maximum dripping time of copper sulfate can reach about 43 minutes, which exceeds the general medium and high temperature phosphating. Moreover, pre-treatment does not require surface adjustment, and post-treatment does not require passivation or saponification sealing, and does not produce any sediments.
Hot Tags: medium temperature zinc phosphating solution, China medium temperature zinc phosphating solution manufacturers, suppliers, factory, medium temperature zinc system, zinc alloy medium temperature, medium temperature zinc manufacturing, zinc solution medium temperature, zinc process medium temperature, zinc treatment at medium temperature
