Environment-friendly antirust phosphating solution

Abstract

The invention relates to an environment-friendly antirust phosphating solution which has the antirust and lubricating functions used in the automobile coating process. The phosphating solution is prepared by phosphoric acid, zinc dihydrogen phosphate, zinc nitrate, sodium nitrite and hydroxylamine sulphate according to ratio of parts by weight. The phosphating solution has the advantages of high hardness of the phosphating film, low porosity, low cost, uniform, continuous and compact phosphating film, no pollution, better working condition and small damage to the operator; the corrosion during the process is basically eliminated, the phosphating film has certain corrosion resistance, and the adhesion between a paint layer and a matrix is increased; in addition, the phosphating solution has stability, long service life, quick response speed, short time, low temperature and less sludge, and can be used for automobile coating as well as home appliances coating.

Description

technical field [0001] The invention relates to a phosphating solution, in particular to an environment-friendly antirust phosphating solution with antirust and lubricating functions applied in the automobile coating process. Background technique [0002] In the painting process of automobiles, it mainly includes pretreatment-spraying primer-spraying-topcoat, among which the pretreatment process is particularly important. Therefore, phosphating treatment, as the main step of pretreatment, is particularly important. [0003] Phosphating treatment is to form a non-metallic, non-conductive, porous phosphate film on the metal surface (mainly steel) through a chemical reaction. Phosphating treatment process is widely used in industry, such as metal forming, lubrication, anti-rust, coating, etc. is one of its main uses. The phosphating film is porous, and the coating can penetrate into these pores, which can significantly improve the adhesion of the coating film. In addition, t...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the above-mentioned prior art, the present invention provides an environmentally friendly anti-rust phosphating solution, which solves the problems of poor adhesion, low hardness, high porosity, and poor anti-corrosion ability in the prior art, and the cost is low , the phosphating film is uniform, continuous, dense and pollution-free