Alodine Coating

Alodine Coating

Alodine is a surface finish of aluminum alloy, mainly used to improve the corrosion resistance of aluminum alloy structure and adhesion with primer.

Alodine Coating

Alodine is a surface finish of aluminum alloy, mainly used to improve the corrosion resistance of aluminum alloy structure and adhesion with primer.

Alodine Coating

Description

Applicable Materials

Aluminum, Iron, Copper, Magnesium

For Serivices

Alodine Material Type

Alodine 600, 1000, 1200, 1200S, 1201, 1000, 1000L, 1001, 1500

Applications

Automobile manufacturing, Aerospace manufacturing, Electrical industry

Features

Appearance

Iridescent Greenish-gold, Yellow, Claybank, Transparency

Standard Type

MIL-DTL-5541,  ASTM B449,ASTM B921,AMS 2473,AMS 2474,ISO 8081

Strengths

Low cost, Easy to process, Not affect the size of the part and Mechanical properties

Coating Thickness

0.25-1.0 µm

Alodine finishes refer to the application of iodine solution on the surface of the material,so that the solution and the surface material chemical reaction, the formation of a very thin (0.5~4 micron) oxidation film. The principle of allowing anode oxidation is chromate passivation chemical reaction. The main components of elastin are chromic anhydride, tetrafluoroborate a, sodium fluoride, and other substances mixed in a certain proportion.

Alodine costs slightly less than anodizing, but it is more prone to scratches, wear, and damage to the appearance, and it cannot be used for decorative purposes and is irritating to the skin.

The most commonly standard is MIL-DTL-5541 with two classes. Type 1 and Type 2.

Alodine Material Properties

Document
Materials Type Coating Color Description
600 Yellow The raw material is in powder form and is used on the surface of fuel tank structures coated with flame-resistant paint (BMS10-20). It is recommended for the formation of the low resistivity oxide film.
1200、1200S、1201 Iridescent Greenish-gold The raw material is concentrated liquid, it is use for aluminum coated structural parts that do not need painting.
1000、1000L、1001、1500m Transparency The raw material is concentrated liquid, It is used for aluminum-coated structural parts that do not require painting.
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