Aluminium paste anode electrophoresis tank liquid and aluminium paste anode electrophoresis technology

Abstract

A provided aluminium paste anode electrophoresis tank liquid is composed of anode electrophoresis paint, aluminium paste, an aluminium paste auxiliary agent, a solvent and deionized water. A provided aluminium paste anode electrophoresis technology comprises the following steps: (1) pretreating a base material; (2) putting the pretreated base material in the aluminium paste anode electrophoresis tank liquid for electrophoresis, and controlling all technological parameters; (3) washing by using pure water; and (4) solidifying and drying. Various technological problems in the prior art are broken through, the developed liquid and technology are suitable for aluminium paste anode electrophoresis, an electrophoresis film with the thickness of 15-30 mu m is obtained, and the film is uniform in thickness, high in hardness, good in adhesive force, good in wear resistance, flat in appearance, slivery white and strong in metal texture, and possesses both corrosion resistance and decorative property.

Description

technical field [0001] The invention belongs to the technical field of electrophoresis, and in particular relates to a process method for applying aluminum-silver paste as a metal pigment to anode electrophoresis. Background technique [0002] Aluminum powder is commonly known as aluminum silver powder or silver powder because of its silvery-white metallic luster. Water-based paint. Aluminum pigment, also known as aluminum silver powder or aluminum silver paste, is an important variety of metal pigments. Aluminum silver paste is also called aluminum powder paste. It is a malleable external coating made by stirring and dispersing aluminum powder and organic solvents. Tough flakes of cladding, this kind of aluminum flake is characterized by smooth and flat surface, concentrated particle size distribution, regular shape, excellent light reflection ability and metallic luster, used as a pigment in paint, can make the paint film produce Obvious color flop effect, appearance ran...

AI Technical Summary

Problems solved by technology

[0003] However, the traditional aluminum-silver paste spraying organic solvent has a large amount of volatilization, which has a great harm to the human body and the surrounding environment, which is not conducive to environmental protection; in addition, the utilization rate of spraying materials is low, the waste is large, and the cost is relatively high; there are many spraying processes and long curing time , low production efficiency, complex equipment requirements, high processing environment requirements, sagging, dead angles, and uneven edges, all of which restrict the popularization and application of the aluminum-silver paste spraying process, and replace the aluminum-silver paste spraying process with the aluminum-silver paste electrophoresis process It is a new bright spot in the field of coating. Some people have studied and tried to obtain a suitable process, but the aluminum-silver paste electrophoresis process is not so easy to implement. Generally, the existing electrophoretic paint uses water-based paint, and the electrophoretic bath is acidic (or alkaline) properties), aluminum is an amphoteric metal, it will corrode when it encounters acid and alkali, it is also easy to oxidize and change color in the air, and the coating of silver paste is also easy to be damaged. In addition, the proportion of silver paste is relatively large, these factors cause aluminum In the process of trial production and production of silver paste anodic electrophoresis, problems such as darkening of paint, reduction of hiding power, coarse particles of paint film, oxidation blackening, yellowing, and silver paste precipitation are likely to occur, which directly affect the aluminum silver paste electrophoresis process. Popularization and application has become a difficulty in the combined application of aluminum silver paste and electrophoretic paint

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