Surface treatment process for aluminum plate

Abstract

The invention discloses a surface treatment process for an aluminum plate. The surface treatment process comprises the following steps: (1) putting the surface of the aluminum plate in a soaking tank, performing 2 minute soaking treatment by using a soaking agent of 32 DEG C, thoroughly washing the soaked surface of the aluminum plate by using clear water, and then gently wiping the washed surface of the aluminum plate by using clean soft cloth; (2) putting the aluminum plate treated in step (1) in an electrolyte, and performing electrolysis with iron as a cathode and the treated aluminum plate as an anode; (3) cleaning the aluminum plate treated in step (2) by using deionized water of 18 DEG C, and then gently wiping up water stains on the surface of the treated aluminum plate by using the clean soft cloth; (4) putting the aluminum plate treated in step (3) in a passivating solution of 22 DEG C for 82-88 second passivating treatment; (5) thoroughly washing the aluminum plate subjected to the passivating treatment by using deionized water; and (6) spraying paint. In the same using environment, the service life of the aluminum plate subjected to the surface treatment process provided by the invention is 1.2 times longer than that of a common aluminum plate. By adoption of the surface treatment process, the service life of a coating formed by the paint can reach 7-9 years.

Description

technical field [0001] The invention relates to the field of aluminum plate surface treatment, in particular to an aluminum plate surface treatment process. Background technique [0002] Aluminum and aluminum alloys are currently one of the most economically applicable materials that are widely used. Since 1956, the world's aluminum output has surpassed that of copper, and it has always ranked first in non-ferrous metals. The current output and consumption of aluminum (calculated by ton) is second only to steel, and has become the second largest metal used by human beings; moreover, aluminum resources are very abundant. According to preliminary calculations, the mineral reserves of aluminum account for more than 8% of the earth's crust. . Aluminum is widely used. Although the surface of aluminum will be oxidized during the placement process, its density and uniformity are poor. In some special fields, it is necessary to passivate the surface of the aluminum plate first, an...

AI Technical Summary

Problems solved by technology

Aluminum is widely used. Although the surface of aluminum will be oxidized during the placement process, its density and uniformity are poor. In some special fields, it is necessary to passivate the surface of the aluminum plate first, and then spray paint to prevent aluminum corrosion. The passivation density of some passivation treatment methods is not high, and the thickness of the passivation layer is relatively thin, which is easy to fall off. Most of the existing aluminum coatings still contain a certain amount of organic solvents. , the solvent volatilizes and pollutes the environment

Many of the existing aluminum coatings do not meet the higher requirements and cannot meet the application requirements of many occasions