Sulfuric Acid Anodizing / Hard Anodizing

The goal of anodizing treatment was originally for anti-oxidation. With technological advancements, anodizing of aluminum can now be applied to various performances of products according to different purposes. Such as not only enhancing their functionality, but also it can use dyes for coloring to present vivid colors and brightness, thereby increasing the decorative appearance of the products.

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Our company mainly utilizes dilute sulfuric acid for the aluminum alloy anodizing process.

Our company mainly utilizes dilute sulfuric acid for the aluminum alloy anodizing process.

Process Specification

Standardization

Thickness (um)

Natural Anodizing

MIL-A-8625 TYPE II, CLASS1

5-20μm

Color Anodizing

MIL-A-8625 TYPE II, CLASS2

12-20μm

Hard Anodizing (Natural)

MIL-A-8625 TYPE III, CLASS1

20-30μm

Hard Anodizing (Dye)

MIL-A-8625 TYPE III, CLASS2

20-30μm

For thicknesses exceeding 30 micrometers, please contact us.

Laser Engraving Before Anodizing:
This process allows the laser-etched areas to exhibit different colors after anodization, thus achieving patterns or text with stereosis and visual effects.

The sequence of this process accentuates the pattern of the workpiece and keeping the advantages of anodization, which enhance both durability and aesthetics.

Anodizing Before Laser Engraving:
This approach creates a relief on the surface, resulting in clearer and more prominent patterns or text.

The sequence of this process ensures even oxidation film on the surface of the product while achieving precise laser-etched patterns.

In summary, the different process sequences will affect the final outcome. Depending on specific application requirements and design needs, selecting the appropriate process sequence can optimize both the appearance and performance of the product