Electrostatic nano powder coating without chromization and phosphorization and its preparing method

Abstract

The invention relates to a kind of static electricity spraying and smearing nano powder dope which needn't chromized or phosphorized and its producing method. It's used for static electricity spraying and smearing of aluminium, aluminum alloy, magnesium alloy and steel. It's made from two-time smelting method. Firstly, add inorganic compound nanometer grains of certain proportion and grain size bound into powder polyester or epoxy resin grains of certain grain size bound, and have first time smelt, extrude, produce pieces and comminute. Then mix polyester or epoxy resin with inorganic compound nanometer grain with other padding as certain proportion, and have second time smelt, extrude, produce pieces and comminute. Produce through superfine comminuting and grinding. Make full use of electricity strength and Coulomb strength, equably and compactly absorb powder dope grains of different grain sizes containing inorganic compound nanometer on the surface of metal base material, to form high compaction coat.

Description

technical field [0001] The invention relates to the fields of nanotechnology, nanomaterials and chemical electrostatic powder coatings, in particular to a nanopowder coating for electrostatic spraying of aluminum, aluminum alloys, and magnesium alloys without chromating and steel without phosphating and a preparation method thereof, which belongs to the international patent classification C09D5 / 03 "Powder Coatings" technical field. Background technique [0002] my country's electrostatic powder coating industry for metal surface spraying has developed rapidly in recent years, but compared with advanced countries, there is still a large gap in the overall technical level of this industrial field, especially the technical performance and quality of electrostatic powder coating products. There are many defects and deficiencies in the special function effect. Therefore, the main technical equipment and raw materials of my country's coating industry, as well as high-quality and s...

AI Technical Summary

Problems solved by technology

[0005] It can be seen from this that the traditional metal surface coating technology and coating materials cannot achieve anti-corrosion effect at all.

Before coating metal materials, the chromium and phosphating coating processes stipulated in the national coating industry technical standards not only increase the industrial cost of the enterprise, but also cause carcinogens and toxic substances of chromium and phosphorus. A large amount of industrial wastewater generated by chromating and phosphating processes has been discharged, causing serious environmental pollution and endangering people's lives and health and urban development

Images