Surface treatment of aluminum profiles serves multiple purposes, including corrosion and rust prevention, extending service life, and enhancing appearance color. It is an indispensable process in profile production. The mainstream processes on the market are divided into five major techniques: anodizing, powder coating, electrophoresis, fluorocarbon coating, and wood grain transfer printing.
anodizing
A dense protective film of aluminum oxide is formed on the surface of the profile, giving the metal a strong original texture, resistance to wear and scratching, and reduced film peeling. The colors are mainly silver white, bronze, and black. It is widely used in industrial aluminum profiles, equipment racks, and assembly line frames, offering high cost performance and is a standard process for industrial profiles.
powder coating
Using electrostatic spraying of epoxy resin powder, it offers a wide range of color options, good adhesion, UV resistance, and outdoor exposure resistance, making it less prone to peeling and fading. It is commonly used for building doors and windows, sunrooms, ordinary curtain walls, and is the most commonly used process for home decoration profiles.
electrophoretic coating
A transparent or colored paint film is applied onto the surface of the oxide layer, resulting in a fine and smooth paint finish with high flatness, resistance to stains and water, and a superior gloss compared to ordinary spray painting. It is commonly used for high-end bridge-cut aluminum doors and windows, as well as interior decorative profiles.
Fluorocarbon spraying
The coating is made of fluorocarbon resin, boasting top-notch acid and alkali resistance, salt spray resistance, and weatherability. It is the preferred choice for coastal areas with high rainfall and corrosive environments, with a service life of up to 30 to 50 years. It is mainly used for high-rise building curtain walls and outdoor large-scale engineering profiles, but its cost is relatively high.
wood grain transfer
By utilizing thermal transfer technology to replicate solid wood grain, the simulation is highly accurate, combining the durability of aluminum with the appearance value of solid wood. It is suitable for indoor partitions, antique doors and windows, and garden decorative profiles.
Simple selection
Industrial frames → anodizing; household doors and windows → powder coating / electrophoresis; high-rise curtain walls / coastal projects → fluorocarbon coating; indoor wood-like decoration → wood grain transfer printing
