GOLD Anodizing aluminum for decoration

Oxidized gold aluminum alloy profiles are more difficult to manufacture, mainly because the uniformity and stability of the gold coloring is more difficult to control. Below is a detailed description of the main challenges and countermeasures faced in manufacturing oxidized gold-colored aluminum alloy profiles at our plant:

Manufacturing Difficulties and Challenges

Color uniformity:

Difficulty: Gold color is extremely sensitive to color difference, any tiny unevenness will show up and affect the appearance.

Measure: Strictly control the time, temperature and solution concentration during the anodizing and dyeing process to ensure a consistent surface finish on all profiles.

Color stability:

Difficulty: Gold dyes are easily affected by external conditions (such as light, humidity, temperature, etc.) and change color.

Measure: Use high quality dyes and adequate sealing treatment to enhance the stability of the antioxidant film.

Surface treatment:

Difficulty: Improper surface treatment can lead to uneven dyeing, poor color or color spots.

Measure: Perform high quality mechanical and chemical polishing to ensure a flawless surface finish.

Process Control:

Difficulty: The process parameters such as current, voltage and temperature during anodizing and dyeing need to be precisely controlled, and a slight deviation may affect the color effect.

Measures: Adopt advanced process control equipment and strict operating procedures to ensure the stability and controllability of each process parameter.

Manufacturing process and countermeasures

Raw material selection:

Measures: Select high-quality aluminum alloy materials to ensure that the raw materials are pure and free of impurities to ensure the surface quality and color uniformity of the final product.

Surface Pre-treatment:

Degreasing: Use alkaline or acidic cleaners to remove oil and contaminants from the surface to ensure a clean surface.

Chemical Polishing: Chemical polishing using a mixture of phosphoric acid and nitric acid solution to remove oxidized skin and fine scratches and obtain a bright surface.

Neutralization: Neutralization using a dilute nitric acid solution removes residual alkaline substances from the surface.

Anodizing:

Measures: Immerse the aluminum alloy profile in sulfuric acid solution as an anode for electrolysis to form a dense oxide film. Strictly control the parameters such as voltage, current density, time and temperature to ensure the quality of the oxide film.

Golden coloring:

Measures: Use special gold organic dyes for dyeing process. Strictly control the temperature, time and dye concentration during the dyeing process to ensure the uniformity and stability of the color.

Sealing treatment:

Measures: Use hot water sealing, steam sealing or chemical sealing for sealing treatment to enhance the corrosion resistance and stability of the oxide film.

Inspection and packaging:

Measures: Strict quality inspection of the final product to check the surface finish, color uniformity, oxide film thickness and corrosion resistance, etc., to ensure that qualified products leave the factory.

Process control points

Temperature control: Strict temperature control during extrusion, heat treatment, anodizing and sealing treatment to avoid overheating or overcooling of materials.

Time control: The time of each process step needs to be strictly controlled to avoid over-treatment or under-treatment.

Chemical Concentration: During degreasing, chemical polishing, anodizing and coloring, the concentration of chemical solutions needs to be strictly controlled to ensure consistent treatment results.

Electrolysis parameters: In the anodizing process, parameters such as voltage and current density need to be precisely controlled.

Dyeing uniformity: in the dyeing process, ensure the uniformity of the dyeing solution in the dyeing bath, control the dipping time and the temperature of the dyeing solution to avoid color difference.

Conclusion

Manufacturing high-quality oxidized gold aluminum alloy profiles requires meticulous process control and strict quality management. By selecting high-quality raw materials, carrying out fine surface treatment, strictly controlling the process parameters in the anodizing and dyeing process, and adopting effective sealing treatment, we can overcome the various difficulties in the manufacturing process and produce high-quality oxidized gold aluminum alloy profiles