Method for producing black aluminum profile by using anodized single nickel salt for coloring and aluminum profile

Abstract

The invention provides a method for producing a black aluminum profile by using anodized single nickel salt for coloring. The method specifically comprises the steps of aluminum profile surface pre-treatment, aluminum profile surface anodizing, alternate-current electrolytic coloring, boiling water sealing and the like, and in the process of alternate-current electrolytic coloring, the aluminum profile is subjected to voltage control coloring at three stages. Meanwhile, the invention provides the black aluminum profile obtained according to the method. The method for producing the black aluminum profile by using the anodized single nickel salt for coloring is implemented under a normal-temperature environment, and energy consumption is low; a dense anode oxide film with high surface smoothness is obtained after anodizing is completed; and the continuous and stable pure black anodized aluminum profile is produced after three-stage coloring treatment is carried out, and is uniform and bright in surface, small in color difference, good in decoration effect, and well resistant to rust, salt water, salt spray, humidity, heat, cold and scratch.

Description

technical field [0001] The invention relates to the technical field of aluminum profile processing, in particular to a method for producing black aluminum profiles by using anodized single nickel salt coloring and the aluminum profiles. Background technique [0002] Metal coloring belongs to the surface treatment technology. It is a coloring treatment on the metal surface to prevent metal corrosion and achieve the purpose of decoration at the same time. After the metal is treated, the color presented on the surface is caused by the reflection, refraction or interference of light. The thickness of the film, the size of the compound particles and other factors are different, and the reflection, interference and refraction of light are different, thus showing different colors. [0003] As a surface treatment technology, metal coloring has been widely used and has become a very active field of surface engineering technology. Metal not only changes the appearance of parts, but ...

AI Technical Summary

Problems solved by technology

A lot of practice has proved that the corrosion resistance, weather resistance, optical rotation resistance and service life of the electrolytic coloring film on the surface of aluminum alloy are much better than that of the dyed film, but the chromaticity, uniformity and weather resistance of the appearance of the black oxide film are often not perfect. Satisfactory, it is very difficult to obtain a uniform and stable black oxide film, especially a deep black oxide film

After the traditional aluminum alloy is anodized, the electrolytic black voltage range is narrow, and the black oxide film obtained by coloring often has the disadvantages of black impurity, graying or browning.

[0005] Single nickel salt coloring is often used to produce champagne series light-colored anodized aluminum profiles, and has a relatively mature and stable production process, but it is not easy to produce pure black anodized aluminum profiles, or the production of black anodized aluminum profiles is unstable

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