What are the types of surface treatment methods for extruded aluminum profiles ?

December 28, 2024

Aluminum profile processing is a complete process from raw material preparation to finished product packaging, involving multiple steps and processes. Each step requires strict control of quality and technical parameters to ensure that the performance and quality of the final product meet customer needs.

The surface treatment of aluminum profiles is an important step in improving product performance, aesthetics, and durability.

The common surface treatment methods for aluminum profiles can be classified into the following categories:

1、 Mechanical processing

Sandblasting

Principle: Use the impact of high-speed sand flow to clean and roughen metal surfaces.

Effect: Increase surface roughness, improve coating adhesion, enhance fatigue resistance, and prolong coating durability.

Application: Commonly used for pre-treatment before painting to enhance the adhesion of the coating.

polishing

Principle: Reduce the surface roughness of the workpiece through mechanical, chemical, or electrochemical methods to obtain a bright and smooth surface.

Classification: including mechanical polishing, chemical polishing, electrolytic polishing, etc.

Effect: Create a stainless steel mirror like effect, enhancing the beauty and grade of the product.

Application: High end decoration, electronic product casing and other fields.

wire drawing

Principle: Use sandpaper or other tools to repeatedly scratch the surface of aluminum profiles, forming line textures.

Categories: Straight line drawing, random line drawing, spiral line drawing, thread drawing, etc.

Effect: The product surface presents a matte and fine hair like luster, combining fashion and technology.

Applications: Building decoration, home appliances, and other fields.

High gloss cutting

Principle: Use a precision carving machine to reinforce the diamond knife on a high-speed rotating spindle, cutting the surface of the aluminum profile to produce bright areas.

Effect: Enhance the glossiness and fashion sense of the product surface.

Application: Precision manufacturing fields such as mobile phones and electronic products.

2、 Chemical treatment

anodic oxidation

Principle: Using the principle of electrolysis to form a uniform and dense oxide film (Al2O3) on the surface of aluminum profiles.

Effect: Improve surface hardness, wear resistance, and corrosion resistance, while enhancing aesthetics.

Application: Widely used in fields such as architecture, transportation, electronics, aerospace, etc.

Chemical plating

Principle: Without current passing through, metal ions are reduced and deposited on the surface of the part to form a coating through the oxidation-reduction effect of a reducing agent in the same solution.

Effect: Increase surface hardness and wear resistance, while improving appearance.

Application: Suitable for local plating or correction occasions.

Electrophoretic coating

Principle: Using the phenomenon of electrophoresis to deposit coating particles on the surface of aluminum profiles under the action of an electric field to form a coating.

Effect: Uniform coating, strong adhesion, and good corrosion resistance.

Applications: automotive, home appliances, construction and other fields.

Powder coating

Principle: Using electrostatic spraying technology to evenly spray powder coating on the surface of aluminum profiles, and then curing to form a coating.

Effect: The coating has rich colors, good decorative properties, and strong corrosion resistance.

Application: fields such as architectural decoration and outdoor facilities.

Author:

Mr. zhichengaluminumindustry

E-mail:

zcd.aluminum@gmail.com

Phone/WhatsApp:

+852 64053048