Wholesale Aluminium alloy lamp base parts Manufacturers

Introduction to the anodizing and spraying process of Aluminum Alloy Lamp Base Parts during surface treatment

As the "foundation" of the lamp, the aluminum alloy lamp base parts bear the weight of the lamp and are one of the focuses of the user's sight. Its surface treatment must meet the basic anti-corrosion requirements, and also pursue visual beauty and tactile comfort. Anodizing and spraying are two mainstream surface treatment technologies, each with its own advantages, and together they put on a gorgeous coat for the aluminum alloy lamp base parts.

1. Anodizing process
Pretreatment stage:
The first step of anodizing is pretreatment, which aims to remove oil, oxides and other impurities on the surface of the aluminum alloy to create a clean and uniform base for the subsequent oxidation process. Pretreatment usually includes the following steps.
Degreasing: Use organic solvents or alkaline cleaning agents to remove oil from the surface of the aluminum alloy to ensure that the surface is clean and oil-free.
Rust removal: Use acidic solutions or mechanical methods to remove rust and oxide scale on the surface to restore the metallic luster.
Cleaning: Rinse the aluminum alloy surface with plenty of clean water to remove residual cleaning agents or acid to ensure that there is no residue on the surface.
Drying: Place the cleaned aluminum alloy parts in a ventilated place to dry naturally, or use an oven to accelerate the drying process.
Anodizing stage:
After the pretreatment is completed, the aluminum alloy parts can enter the anodizing tank for oxidation treatment. Anodizing is an electrolytic process that forms a dense oxide film on the surface of the aluminum alloy through electrolysis. The specific process is as follows.
Mounting: Fix the pretreated aluminum alloy parts on the anode of the anodizing tank with a conductive clamp.
Prepare electrolyte: Prepare sulfuric acid, oxalic acid and other electrolytes of appropriate concentrations according to the thickness and color of the required oxide film.
Electrolysis: After the electrolyte is heated to a certain temperature, direct current is passed through, allowing the aluminum alloy parts to act as anodes in the electrolyte for oxidation reaction. During the oxidation process, oxygen ions combine with aluminum atoms on the surface of the aluminum alloy to form a dense aluminum oxide film.
Control parameters: During the electrolysis process, parameters such as voltage, current density, electrolyte temperature and time need to be strictly controlled to ensure the thickness and quality of the oxide film.
Post-treatment stage:
After anodizing, a series of post-treatments are required to improve the corrosion resistance, wear resistance and aesthetics of the oxide film. Post-treatment usually includes the following steps.
Cleaning: Use deionized water or distilled water to clean the surface of the oxide film to remove residual electrolyte and impurities.
Sealing treatment: Use boiling water sealing, dichromate sealing or nickel salt sealing to seal the micropores on the surface of the oxide film to improve corrosion resistance.
Dyeing: The oxide film can be dyed as needed to give it rich colors. Dyeing usually uses organic dyes or inorganic pigments, which are achieved by soaking, electrophoresis, etc.
Curing: The dyed oxide film is dried or baked to allow the dye or pigment to firmly adhere to the oxide film.

2. Spraying process
Pretreatment stage:
Pretreatment before spraying is equally important, but the specific steps are slightly different. Spraying pretreatment mainly includes degreasing, rust removal, grinding and primer treatment.
Degreasing and rust removal: Same as anodizing pretreatment, it aims to remove oil and rust on the surface of aluminum alloy.
Grinding: Use sandpaper or a grinder to grind the aluminum alloy surface to improve the adhesion and aesthetics of the coating.
Primer treatment: Apply a layer of primer before spraying to enhance the adhesion between the coating and the substrate and prevent metal corrosion.
Spraying stage:
Spraying is the process of spraying the paint evenly on the surface of the aluminum alloy through a spray gun. The specific steps include the following aspects.
Paint selection: Select the appropriate paint type (such as powder paint, oil-based paint, water-based paint, etc.) and color according to the use environment and design requirements of the aluminum alloy lamp holder parts.
Adjust the spraying parameters: including the pressure of the spray gun, spraying distance, spraying speed, etc., to ensure that the coating is uniform, without bubbles and sagging.
Spraying operation: Spray the paint evenly on the surface of the aluminum alloy, paying attention to controlling the thickness and uniformity of the coating. For parts with complex shapes, multiple spraying or manual repair methods may be required.
Curing stage: After spraying, the coating needs to be cured to allow the resin and other components in the coating to react chemically to form a hard coating film. The curing method is usually natural curing, placing the sprayed aluminum alloy parts in a well-ventilated environment to dry and cure naturally. This method is suitable for occasions where the curing speed is not required.