Pre-dyeing treatment agent for surface of blind hole workpiece in aluminum alloy welding area and application technology thereof

Abstract

The invention discloses a pre-dyeing treatment agent for a surface of a blind hole workpiece in an aluminum alloy welding area and an application technology thereof. The pre-dyeing treatment agent comprises the following raw materials by mass percent: 70-85% of organic acids, 13-28% of organic acid salts and 0.5-2% of anionic surfactants. By utilizing a working solution of the pre-dyeing treatment agent to perform pre-dyeing treatment on an aluminum alloy workpiece with a welded blind hole structure, the dyeing quality of the workpiece is greatly increased, the dyeing speed is increased, the dyeing time is reduced and the dyeing reject ratio is greatly reduced. By utilizing the working solution of the pre-dyeing treatment agent to treat the aluminum alloy workpiece with the welded blind hole structure, the environmental pollution is avoided, the dyeing yield is greatly increased and is above 98%, the color quality of products is stable, the time is greatly saved and the production efficiency is increased, so that the defects and the inferior treating effect of the prior art are overcome.

Description

technical field [0001] The invention relates to a pre-dyeing treatment agent for aluminum alloy welding areas and the surface of blind hole workpieces, and also relates to a process for dyeing the aluminum alloy welding area and the surface of blind hole workpieces with the treatment agent. Background technique [0002] Metal workpieces made of aluminum or its alloys have high-quality mechanical properties, so these workpieces are extremely widely used in many industries, and these workpieces usually require surface treatment to improve surface corrosion resistance. [0003] Anodizing is a surface treatment process performed in an anodizing solution to enhance the decorative and durable properties of metal workpieces. During the anodizing process of aluminum alloy workpieces, a porous oxide film is formed on the surface, and the oxidized workpieces are usually dyed to obtain a decorative outer surface, usually in a dyeing solution, and organic dyes dissolved in the dyeing so...

AI Technical Summary

Problems solved by technology

[0005] There are two ways to enhance the dyeing quality that are often used now: one is to use 1-3% NH 3 .H 2 O neutralizes the oxidation bath liquid remaining in the weld, deep hole or blind hole to improve the dyeing effect, but its disadvantages are: the effect of improving the dyeing quality is very limited, the yield rate cannot be guaranteed, and the product color quality fluctuates greatly. And 1-3% NH 3 .H 2 The smell of O is heavy, which is harmful to the health and safety of operators

Since this method uses 10-30% HNO 3 , HNO 3 It is volatile and pollutes the environment greatly, and it is also harmful to the health of operators. At the same time, the effect of improving the dyeing quality is limited, the yield rate cannot be guaranteed, and the product color quality fluctuates greatly.

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