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What is the process flow of passivation treatment on the surface? Overview: The substrate used for aluminum veneer is aluminum alloy plate, and the surface needs to be passivated to enhance fluorocarbon and other. Due to the poor surface adhesion of the substrate used for aluminum veneer, surface pretreatment must be performed, such as aluminum calcination, electroplating, anodizing, etc.
The aluminum veneer after passivation treatment can not only enhance the bonding strength of the coating, but also greatly improve the corrosion resistance.
Detailed explanation of the process flow of passivation treatment of aluminum veneer
The process flow of passivation treatment of aluminum and aluminum alloy veneer is generally: degreasing and degreasing cleaning - clean water washing - aluminum chemical solution to remove the oxide layer - clean water washing
The process flow of passivation treatment of aluminum and aluminum alloy is as follows:
Degreasing and degreasing cleaning: The main purpose is to remove impurities such as oil stains and dirt attached to the surface of aluminum alloy. Aluminum cleaning agent is used, environmentally friendly formula, non-corrosive, fast degreasing and decontamination, generally only need to soak for 1-3 minutes to thoroughly clean.
Second, chemical solution to remove the oxide layer: Aluminum is easy to oxidize, surface oxidation spots will affect the overall appearance, and affect the adhesion of the paint, especially the indispensable process. The use of chemical aluminum polishing agent can quickly improve the gloss of aluminum, achieve a mirror effect, and remove burrs. The operation is simple, soak at room temperature.
Third, aluminum passivation: soak in aluminum passivation solution, the passivation time is 1-5 minutes, the purpose of passivation treatment is to form a dense and uniform coating on the surface of aluminum alloy.
Fourth, pure water soaking: 3 minutes. This process is a necessary process. Because the chloride ions in tap water usually adhere to the surface of aluminum parts.
