Typical Anodizing Specifications
Military Specifications: Mil-8625 Type;
- Chromic Acid
- Sulfuric Acid
- Sulfuric Acid Hardcoat
A.S.T.M specifications: B-580 Type;
- Hardcoat
- Architectural Class 1
- Architectural Class 2
- Automotive Exterior
- Interior Moderate
- Interior Limited
- Chromic Acid
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Anodizing is an electrochemical process producing decorative and protective finishes on aluminum parts and products. Parts to be anodized are mounted on special racks that grasp, and allow a specified amount of electrical current to reach each piece.
Aluminum parts, require the natural oxides and oils to be removed prior to Anodizing therefore, parts must undergo a pretreat, usually involving a series of mild cleaners as well as an Etch solution or a Brite dip. The Brite dip will brighten the part to a brilliant shine, as the Etch will produce a clean, satin finish.
The Anodizing takes place in a solution of Sulfuric or Chromic acid, which converts the aluminum to aluminum oxide. . This aluminum oxide can be produced in thicknesses from as little as .0001” up to .003” thick allowing for enhanced durability.
Following Anodizing, the parts can be dyed using a wide variety of color dyes as well as metal ion impregnation to achieve an extensive spectrum of finishes. The parts are then sealed, locking in the desired color, and producing a high quality, durable finish.
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