What are the commonly used processes for surface treatment of aluminum veneer?
The surface shape and smoothness of aluminum veneer will affect the quality of aluminum veneer to a large extent.
It curtain wall commonly uses decorative aluminum alloy material for outdoor walls of buildings.
The surface needs to process by multiple processes to be beautiful and atmospheric.
So what the commonly used processes for surface treatment of It?
Aluminum sheets and aluminum profiles usually require surface treatment to meet different needs.
Common surface treatments for aluminum veneers include sandblasting, coloring, oxide film treatment, and so on.
1. Sandblasting of aluminum veneer
The main function is surface cleaning. Sandblasting before painting (painting or plastic spraying) can increase the surface roughness and contribute to the improvement of adhesion, but the contribution limit.
It is not as good as the pretreatment of chemical paint.
There are two main processes for coloring aluminum:
one is the aluminum oxidation coloring process, and the other is the aluminum electrophoresis coloring process.
Various colors form on the oxide film to meet certain usage requirements, such as black for optical instrument parts and golden yellow for commemorative medals.
3. Conductive oxidation (chromate conversion coating)-used in occasions where both protection and conductivity are required.
4. Chemical oxidation
The oxide film is thin, with a thickness of about 0.5-4 microns, is porous, soft, and has good adsorption properties.
It can be used as the bottom layer of organic coatings, but its wear resistance and corrosion resistance are not as good as anodic oxide films.
The above four processing methods are only part of the surface treatment methods of It, but they also play a decisive role in the shape and color of the aluminum veneer surface.
Therefore, it is necessary to strictly follow the aluminum veneer industry standards for production and processing during the processing.
The surface treatment of it cannot anodize.
Because each batch of aluminum plates has different material composition and oxidation solution, the surface color difference after oxidation is large, and the overall decoration effect of the curtain wall is extremely poor.
The current color of the anodized aluminum curtain wall is an aluminum natural color.
And gold, anodized aluminum veneer prices are also more expensive, so now most of the reasons for the use of fluorocarbon spraying in the market.