Surface treatment technique for aluminum

Abstract

The invention discloses a surface treatment technique for aluminum. The surface treatment technique is characterized by comprising the following steps that (1) degreasing treatment is conducted, and the aluminum is dipped in a degreasing agent for 10-20 min; (2) after degreasing is finished, the aluminum is placed into a solution composed of sodium fluoride, concentrated nitric acid and water and dipped for 5-8 min at the room temperature; (3) the aluminum is placed into a solution composed of concentrated sulfuric acid, sodium dichromate and water and dipped for 2-3 min at the room temperature; and (4) the aluminum is washed in cold water for 5-8 min, washed through distilled water for 3-5 min and then dried at the temperature of 50-60 DEG C. According to the surface treatment technique for the aluminum, the technique is simple, through strict technological parameter control, the oxide skin removal speed is high, the damage of part base bodies can be reduced, and removal is more thorough.

Description

technical field [0001] The invention belongs to the field of surface treatment, in particular to an aluminum surface treatment process. Background technique [0002] Aluminum, its surface is prone to oxidation, forming a dense oxide film. The oxide film is loose and porous. Anti-oxidation measures must be implemented for this type of aluminum. The existing measures will deal with some aluminum parts that are particularly sensitive to temperature. , will make the surface of the part reach a very high temperature, cause deformation or cracks of the aluminum part, affect the dimensional accuracy and normal use of the part, and even cause the part to break in severe cases. In the prior art, the aluminum surface oxidation treatment process has the disadvantages of complex process, many steps, serious damage to the part matrix, and incomplete removal. Contents of the invention [0003] The purpose of the present invention is to address the deficiencies in the above-mentioned te...

AI Technical Summary

Problems solved by technology

[0002] Aluminum, its surface is prone to oxidation, forming a dense oxide film. The oxide film is loose and porous. Anti-oxidation measures must be implemented for this type of aluminum. The existing measures will deal with some aluminum parts that are particularly sensitive to temperature. , the surface of the part will reach a very high temperature, causing deformation or cracks of the aluminum part, affecting the dimensional accuracy and normal use of the part, and even causing the part to break in severe cases

In the prior art, the aluminum surface oxidation treatment process has the disadvantages of complex process, many steps, serious damage to the part matrix, and incomplete removal.