Control method for surface roughness of aluminum profile after electrolytic coloring, extinction and painting

Abstract

The invention discloses a control method for surface roughness of an aluminum profile after electrolytic coloring, extinction and painting. The control method comprises the following steps of 1, degreasing; 2, alkali etching; 3, neutralizing; 4, anodic oxidation; 5, electrolytic coloring; 6, sulfuric acid cleaning; 7, extinction electrophoresis; and 8, drying and curing. In the step 1, the concentration of H2SO4 in a sulfuric acid solution subjected to degreasing treatment is 20-100 g / L, in the step 2, the concentration of NaOH in an alkaline solution is 25-90 g / L, the concentration of AL<3+> is 30-80 g / L, in the step 4, the concentration of H2SO4 in the sulfuric acid solution is 150-180 g / L, the concentration of AL<3+> is 5-20 g / L, in the step 6, the concentration of H2SO4 in the sulfuric acid solution is 80-100 g / L, and the water cutting and draining time is 3-5 min. Compared with an existing control method for surface roughness of the aluminum profile after electrolytic coloring, extinction and painting, the control method has the advantages that after electrolytic coloring, the sulfuric acid cleaning process is added, particles on the surface of the aluminum profile after coloring can be thoroughly eliminated, and the smooth surface effect can be obtained.

Description

technical field [0001] The invention relates to the technical field of profile processing, in particular to a method for controlling surface roughness of aluminum profiles after electrolytic coloring and matting paint. Background technique [0002] Electrolytic coloring is a process of surface treatment of aluminum profiles, one of which is black, but when the black product needs to be matched with a matting paint process, it is easy to have problems of rough surface and reduced gloss, and the use of electrolytic coloring The way of immersion in the tank solution cannot completely remove the surface particles, resulting in a low pass rate of the produced products, which greatly increases the production cost and is not conducive to the mass production of the products. Contents of the invention [0003] The object of the present invention is to provide a method for controlling the surface roughness of aluminum profiles after electrolytic coloring and matting painting, so as ...

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Problems solved by technology

[0002] Electrolytic coloring is a process of surface treatment of aluminum profiles, one of which is black, but when the black product needs to be matched with a matting paint process, it is easy to have problems of rough surface and reduced gloss, and the use of electrolytic coloring The method of soaking in the bath solution cannot completely remove the surface particles, resulting in a low pass rate of the produced products, which greatly increases the production cost, which is not conducive to the mass production of products

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