ANODIZING
ANODIZING is the process of electrolytically converting the surface of the aluminum oxide. This coating is much more resistant to corrosion and abrasion than the underlying aluminum. Most anodic caotings, except for hard anodizing, range in thickness from 0.2 to 0.7 mil. Anodizing coats very uniformly and will, therefore, not fill or smooth out a rough or damaged surface.
COLOR ANODIZING consists of dyeing the anodized part, before sealing, with an organic or inorganic coloring material. The depth of the dye absorption depends of the depth porosity of the anodic coating. The dyed coating is transparent and its appearance is affected by the basic reflectivity characteristics of the aluminum. For this reason, the colors should not be expected to match paints, enamel or other colors.
THE KEY BENEFITS of anodizing and color anodizing are:
CHROMATE COATINGS are adherent surface layers of low-solubility chromate compounds produced by the reaction of the aluminum surface with suitable reagents. These coatings affect the appearance, electrochemical potential, electrical resistivity, surface hardness, absorption and other surface properties of the material.
They differ from anodic coatings in that coversion coatings are formed by a chemical oxidation-reduction reaction and anodic coatings are formed by an electro-chemical reaction. The reaction that takes place in chromate coatings involves the removal of 0.01 to 0.1 mil of the material being treated.
Chromate coatings vary in color from the clear and iridescent to light yellow or brown, depending on the composition of the aluminum based material and the thickness of the film. Chromate coatings also exhibit low electrical resistivity.
SPECIFICATIONS: Acton Metal Processing Corp. provides Anodizing and Chromating finishes for Aluminum that conform to the latest revisions of the following specifications:
COLOR ANODIZING consists of dyeing the anodized part, before sealing, with an organic or inorganic coloring material. The depth of the dye absorption depends of the depth porosity of the anodic coating. The dyed coating is transparent and its appearance is affected by the basic reflectivity characteristics of the aluminum. For this reason, the colors should not be expected to match paints, enamel or other colors.
THE KEY BENEFITS of anodizing and color anodizing are:
- Increased corrosion resistance.
- Increased paint adhesion.
- Improved decorative appearance.
- Provides electrical insulation.
- Increased abrasion resistance.
- Enhancement of subsequent plating.
CHROMATE COATINGS are adherent surface layers of low-solubility chromate compounds produced by the reaction of the aluminum surface with suitable reagents. These coatings affect the appearance, electrochemical potential, electrical resistivity, surface hardness, absorption and other surface properties of the material.They differ from anodic coatings in that coversion coatings are formed by a chemical oxidation-reduction reaction and anodic coatings are formed by an electro-chemical reaction. The reaction that takes place in chromate coatings involves the removal of 0.01 to 0.1 mil of the material being treated.
Chromate coatings vary in color from the clear and iridescent to light yellow or brown, depending on the composition of the aluminum based material and the thickness of the film. Chromate coatings also exhibit low electrical resistivity.
SPECIFICATIONS: Acton Metal Processing Corp. provides Anodizing and Chromating finishes for Aluminum that conform to the latest revisions of the following specifications:
IL-A-8625, Type II, Class 1 Anodic Coating For Aluminum And Aluminum Alloys,
Sulfuric Acid Anodizing, Conventional Coating,
Non-dyed.
MIL-A-8625, Type II, Class 2 Anodic Coating For Aluminum And Aluminum Alloys,
Sulfuric Acid Anodizing, Conventional Coating,
Dyed, Color to be specified.
MIL-STD-171E Finish No. 7.2.1 Anodic Film, Sulfuric Acid, MIL-A-8625, Type II,
Class 1, nondyed.
MIL-STD-171E Finish No. 7.2.2 Anodic Film, Sulfuric Acid, MIL-A-8625, Type II,
Class 2, dyed, color to be specified.
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