Anticorrosive coating applied to steel surfaces and spraying process

Abstract

The invention discloses anticorrosive coating applied to steel surfaces. The anticorrosive coating comprises the following components in parts by weight, 40-50 parts of epoxy resin, 30-60 parts of potassium oxide, 100-200 parts of deionized water, 35-61 parts of silicon dioxide, 15-30 parts of polyether type polyurethane epoxy resin, 50-70 parts of an antirust filler, 50-80 parts of a wetting agent, 45-60 parts of a defoaming agent, 20-50 parts of strontium yellow, 40-60 parts of isooctyl methacrylate, 50-80 parts of xylene and 50-70 parts of toluene diisocynate. The coating can be directly sprayed on steel or a steel structure without the need of pretreatment such as acid pickling and phosphating, achieving a disruptive change for traditional coating spraying processes, and thoroughly overcoming chemical pollution generated by pretreatment. The solid content of traditional solvent type anticorrosive coating can only reach 30-40%, the solid content of the disclosed coating can reach 78.7%, solvent is reduced, and the disclosed coating shows good environmental protection performance.

Description

technical field [0001] The invention relates to the field of spray protection, in particular to an anti-corrosion paint applied on steel surfaces and a spray process. Background technique [0002] The surface spraying of steel or steel structures still relies heavily on the pre-treatment process of pickling and phosphating, so that the coating can have a good bonding force with the surface of the workpiece and produce products that meet the requirements. There is generally an oxide layer on the surface of the steel or steel structure product, which will affect the bonding force with the coating. In order to remove the oxide layer, it is necessary to pickle the workpiece to enhance the corrosion resistance and bonding force of the workpiece. However, the chemical pollution of the pickling and phosphating process will cause great damage to the environment. The strong acid treatment solution will cause the farmland to pollute the crops to stop production, and the slightly impr...

AI Technical Summary

Problems solved by technology

However, the chemical pollution of the pickling and phosphating process will cause huge damage to the environment.

The strong acid treatment solution will pollute the farmland and stop the production of crops, and the phosphating treatment solution will cause eutrophication of the water body if it is not properly treated, and a large number of algae will appear, which will affect the ecology of the water body

The sewage treatment standard requires a rather complicated process

In recent years, environmentally friendly phosphating substitute products (zirconium series, silane treatment) have technical defects: poor washing resistance after film formation, poor solution stability, and inability to self-heal

[0003] The chemical pollution of the pickling and phosphating process will cause huge damage to the environment

The strong acid treatment solution will pollute the farmland and stop the production of crops, and the phosphating treatment solution will cause eutrophication of the water body if it is not properly treated, and a large number of algae will appear, which will affect the ecology of the water body

The sewage treatment standard requires a rather complicated process