What is anodized and what's the function?

Anodized Parts

Those parts are made by aluminum and applied for anodizing as surface treatment. Anodizing is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts. Through the anodization process, many colors can be permanently coated on an aluminum part surface and covered by a protective layer, improving their durability, stability, abrasion resistance, and surface finish.

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What is anodizing?

Anodizing is an electrochemical process that converts the metal surface into a decorative, durable, corrosion-resistant, anodic oxide finish. Aluminum is ideally suited to anodizing, although other nonferrous metals, such as magnesium and titanium, also can be anodized. The anodic oxide structure originates from the aluminum substrate and is composed entirely of aluminum oxide. This aluminum oxide is not applied to the surface like paint or plating, but is fully integrated with the underlying aluminum substrate, so it cannot chip or peel. It has a highly ordered, porous structure that allows for secondary processes such as coloring and sealing. Anodizing is accomplished by immersing the aluminum into an acid electrolyte bath and passing an electric current through the medium. A cathode is mounted to the inside of the anodizing tank; the aluminum acts as an anode, so that oxygen ions are released from the electrolyte to combine with the aluminum atoms at the surface of the part being anodized. Anodizing is, therefore, a matter of highly controlled oxidation the enhancement of a naturally occurring phenomenon. Regardiing aluminum parts after cnc machining process, we usually appy anodizing to obtain a decorative, durable, corrosion-resistant surface.

What Are the Benefits of Color Anodizing?

The benefits of color anodizing are listed below:

Color Anodized Parts

1.Aesthetics:

A variety of colors can be applied during color anodizing. This makes the process suitable for prospects who consider color as a factor before making a purchase. Aside from the fact that it is aesthetically pleasing, color anodizing does not affect the metallic appearance of the aluminum parts.

Color Anodized Parts

2.Durability:

Accrual of economic benefits is made possible as a result of the extremely long life span of the anodized products. Maintenance and operating costs can be reduced by a considerable amount.

Color Anodized Parts

3.Excellent corrosion resistance:

Anodizing is useful that it provides a perfectly formed oxide layer around the metal. This ensures that its metallic quality is preserved against the destructive process of corrosion。

What Are the Anodizing Color Choices?

The range of colors that aluminum can be anodized can be roughly included as below:

Anodizing color in changing ways

1. Gold
2. Bronze
3. Blue
4. Green
   5. Red
  6. Copper
  7. Black
8. Silver
9. Gray
10. Purple
   11. Graduallly changing color is also obtained in Janee

For more colors, pls contact Janee's sales representitive. We have our own a anodized factory and we are sure to make the color you want available.

What Are the Ways To Color Anodize Metals?
Janee utilizes one of two options to anodize color into metals, depending on the peculiarity of the application. These are listed below:

Type 2 Anodized Color

Al7075 Hard Anodized Natural Colour

Aluminum Anodized Gradient Color

Type 2 Anodization: The electrolyte used in this process is sulfuric acid. A thicker oxide of aluminum or anodized layer builds up around the aluminum component after it is placed in the sulfuric bath. The result of the electrochemical process is a porous anodic finish which allows the absorption of more dye before finally being sealed to retain the color.
Type 3 Anodization: The anodized coating formed is the thickest of the three methods. Hence, the name hard coat color anodization. A bath of sulfuric acid is also used during the process. Metals (including aluminum components) produced with this method, have the added advantage of being suitable for environments in which extreme wear is possible.

Properties	Type-ll (Sulphuric Acid)	Type-III (Hard Anodized)
Applications	Decorative	Corrosion Resistance
Corrosion Resistance	Good	Excellent
Coating Thickness	2.54-25 μm	12.7-80 μm
Wear Resistance	Moderate	Excellent
Porosity	Moderate to High	High
Environment Friendly	Yes	Yes
Appearance	Clear or Dyed	Hard Clear or Hard Black