Aluminum-matrix aquo-system metal micropowder coating and process therefor

Abstract

The invention discloses an aluminum-matrix aquo-system metal micropowder coating and a process therefor and relates to the technical field of machinery. The aluminum-matrix aquo-system metal micropowder coating is characterized by being prepared from the following raw materials in parts by weight: 20-25 parts of hydrochloric acid, 15-20 parts of tartaric acid, 5-10 parts of HS-99, 5-10 parts of dodecyl sulfuric acid and 10-20 parts of additives. The process for the aluminum-matrix aquo-system metal micropowder coating comprises the steps of pretreatment, coating solution preparing, coating, flushing, preheating, baking, cooling and the like. The aluminum-matrix aquo-system metal micropowder coating prepared by the process has the advantages of uniform and smooth appearance, relatively highornamental performance and relatively good corrosion resistance and heat resistance; and the coating process is simple and convenient, so that the labor cost is reduced.

Description

technical field [0001] The invention relates to the field of mechanical technology, in particular to an aluminum-based water-based metal micro-powder coating and a process for the aluminum-based water-based metal micro-powder coating. Background technique [0002] At present, a common method for anti-corrosion treatment of metal surfaces at home and abroad is electro-galvanizing, but this method is seriously polluted and consumes a lot of energy. The electroplating process is prone to hydrogen embrittlement, resulting in material embrittlement and fracture. The use temperature of the galvanized layer is limited by the aging temperature of the passivation film, and can only be used below 100°C, which has great limitations and is not suitable for use in harsh environments. The anti-corrosion principle of electro-galvanizing is mainly sacrificial anode protection, that is, the anti-corrosion ability of the galvanized layer is proportional to the thickness of the coating. Usuall...

AI Technical Summary

Problems solved by technology

[0002] At present, a common method for anti-corrosion treatment of metal surfaces at home and abroad is electro-galvanizing, but this method is seriously polluted and consumes a lot of energy. The electroplating process is prone to hydrogen embrittlement, resulting in material embrittlement and fracture.

The service temperature of the galvanized layer is limited by the aging temperature of the passivation film, and can only be used below 100°C, which has great limitations and is not suitable for use in harsh environments

The anti-corrosion principle of electro-galvanizing is mainly sacrificial anode protection, that is, the anti-corrosion ability of the galvanized layer is proportional to the thickness of the coating. Usually, the standard thickness of the electro-galvanized layer is about 8-15um, while the actual production of the electro-galvanized layer The thickness is about 5-10um, so its corrosion resistance is poor

The corrosion resistance of the hot-dip galvanized layer can be much higher than that of the electro-galvanized layer, but its energy consumption and pollution are more serious, and the thickness of the hot-dip galvanized layer is large and the precision is poor, so it is not suitable for precision parts and fasteners

In recent years, due to the strengthening of environmental protection regulations, traditional surface treatment processes, such as hot-dip plating and electroplating, have been restricted in many countries and regions due to certain pollution caused by the process.