A kind of preparation method of anticorrosion aluminum profile

Abstract

The invention relates to the field of preparation methods of aluminum profiles, and provides a method for preparing anti-corrosion aluminum profiles with good corrosion resistance, strong adhesion, no toxic substances, and no environmental pollution, including degreasing, washing, anodizing, spraying, and curing Surface chemical treatment is carried out after the anodic oxidation and before spraying. The specific process steps of the surface chemical treatment are: preparing a chemical treatment solution, and immersing the anodized aluminum profile workpiece in the chemical treatment solution for 3 to 5 minutes , drying to obtain an aluminum profile workpiece with a protective layer, and then spray a layer of anti-corrosion coating on the aluminum profile workpiece with a protective layer for 1.0-2.0 minutes, and the spray pressure is 0.05-0.07Mpa.

Description

technical field [0001] The invention relates to the field of preparation methods of aluminum profiles, in particular to a preparation method of anti-corrosion aluminum profiles. Background technique [0002] Aluminum alloy profiles for construction require high comprehensive performance such as corrosion resistance, wear resistance, good appearance decoration and long service life. , the surface chemical treatment must be carried out to improve the bonding force between the coating and the substrate and meet the high corrosion resistance requirements. At present, my country basically adopts the method of chromate conversion treatment, which requires the use of chromium Chemical substances, serious pollution to the environment, high waste water treatment costs, poor stability of chromating solution, easy to become turbid solution, more sediment, easy to hang dust on the surface of the workpiece, poor corrosion resistance and poor adhesion of the chromizing film. There are also...

AI Technical Summary

Problems solved by technology

[0002] Aluminum alloy profiles for construction require high comprehensive performance such as corrosion resistance, wear resistance, good appearance decoration and long service life. , the surface chemical treatment must be carried out to improve the bonding force between the coating and the substrate and meet the high corrosion resistance requirements. At present, my country basically adopts the method of chromate conversion treatment, which requires the use of chromium Chemical substances, serious pollution to the environment, high cost of wastewater treatment, poor stability of chromating solution, easy to become turbid solution, more sediment, easy to hang dust on the surface of workpiece, poor corrosion resistance and poor adhesion of chromizing film

There are also a few chromium-free treatment solutions for surface chemical treatment, but these chromium-free treatment solutions generally use potassium ferricyanide as an accelerator, and ferricyanide will be decomposed into toxic cyanide under the influence of external light