Spraying treatment method of aluminum alloy door and window profiles

Abstract

The invention discloses a spraying treatment method of aluminum alloy door and window profiles. The spraying treatment method comprises the steps of degreasing; detecting the levelness, and finely polishing; passivating in a passivation solution to form a passivation film; performing hole sealing treatment by using a nickel fluoride hole sealing agent; aging to modify the surface quality; standingin a sealed environment of 150-180 DEG C; chromizing to form a compact chromized film; and spraying a protective coating to form a coating, and then thermally curing the coating in a nitrogen atmosphere. According to the spraying treatment method of the aluminum alloy door and window profiles, the surfaces of the aluminum alloy door and window profiles are subjected to a series of treatments before spraying treatment, so that the stability and the strength of the surface state of the aluminum alloy door and window profiles are effectively improved; by standing the aluminum alloy door and window profiles in a sealed environment of 150-180 DEG C, hydrogen atoms in the aluminum alloy door and window profiles are effectively removed, stress of the aluminum alloy door and window profiles is reduced, and product quality of the aluminum alloy door and window profiles after spraying treatment is effectively improved.

Description

technical field [0001] The invention relates to the field of aluminum alloy door and window profiles, in particular to a spraying treatment method for aluminum alloy door and window profiles. Background technique [0002] Aluminum alloy doors and windows refer to doors and windows made of aluminum alloy extruded profiles as frames, stiles, and fan materials. They are called aluminum alloy doors and windows, referred to as aluminum doors and windows. Composite doors and windows, aluminum alloy has the characteristics of low density, high specific strength and specific stiffness, excellent castability and good processing performance, and also has good damping and shock absorption performance, which is very suitable as a door and window material; [0003] However, the aluminum alloy standard electrode has a low potential and active chemical properties, and is easily oxidized by air at room temperature to form a thin oxide film. The oxide film is porous, loose, and has poor corr...

AI Technical Summary

Problems solved by technology

[0003] However, the aluminum alloy standard electrode has a low potential and active chemical properties, and is easily oxidized by air at room temperature to form a thin oxide film. The oxide film is porous, loose, and has poor corrosion resistance, especially in chemical plants, smelters, etc. When using aluminum alloy doors and windows in a poor environment, the surface of aluminum alloy doors and windows is easily damaged by corrosion, which shortens the service life of aluminum alloy doors and windows. Therefore, some effective surface treatment methods are often required to improve the aluminum alloy profiles before use For its surface quality, the common surface treatment method is to spray coatings with different functions on aluminum alloy door and window profiles to improve the surface quality of aluminum alloy door and window profiles. Phenomena such as peeling occur, therefore, the present invention proposes a kind of spray treatment method of aluminum alloy door and window profiles, to solve the deficiencies in the prior art