|Surface Treatment Of Aluminum And Aluminum Alloys, with examples|
Surface Treatment Of Aluminum And Aluminum Alloys
Key to MetalsAluminum alloys are divided into two categories
In order to improve the surface properties of final products of aluminium alloys, such as corrosion resistance, wear resistance, reflectivity etc., different types of surface treatment were designed. All of them are divided into the following groups.
Chemical treatment to improve the optical reflectivity of a surface.
Polishing of a metal surface by immersion in a solution of chemical reagents.
Removal of oil or grease, usually by a suitable organic solvent or an aqueous detergent.
Roughening of the surface of a metal by overall or selective dissolution in acid or caustic media.
Removal of a thin surface layer of a metal by chemical action, mainly by treatment in a caustic solution.
Electrochemical treatment to improve the optical reflectivity of a surface.
Polishing of a metal surface by making it anodic in an appropriate electrolyte.
Metal with an anodic coating, produced by an electrolytic oxidation process in which the metal is converted to a mainly oxide coating having protective, decorative or functional properties.
Clear anodized metal
Metal with a substantially colorless, translucent anodic oxidation coating.
Color anodized metal
Anodized metal colored either during anodizing or by subsequent coloring processes.
Integral color anodized metal
Metal that has been anodized using an appropriate (usually organic acid based) electrolyte which produces a colored coating during the anodizing process itself.
Electrolytically colored anodized metal
Metal with an anodic oxidation coating that has been colored by the electrolytic deposition of a metal or metal oxide into the pore structure.
Dyed anodized metal
Metal with an anodic oxidation coating colored by absorption of dye-stuff or pigments into the pore structure.
Combination color anodized metal
Metal with an anodic oxidation coating that is colored by electrolytic coloring or produced by integral color anodizing followed by absorption dyeing.
Interference color anodized metal
Metal with an anodic oxidation coating colored by means of optical interference effects.
Bright anodized meta
Anodized metal with a high specular reflectance as the primary characteristic.
Anodizing where protection against corrosion or wear is the primary characteristic and appearance is secondary or of no importance.
Anodizing where a decorative finish with a uniform or a esthetically pleasing appearance is the primary characteristic.
Anodizing to produce an architectural finish to be used in permanent, exterior and static situations where both appearance and long life are important.
Hard anodized metal
Anodized metal on which the anodic oxidation coating has been produced with wear and/or abrasion resistance as the primary characteristic.
Treatment of anodic oxidation coatings on metal to reduce porosity and the absorption capacity of the coating by hydrothermal processes carried out after anodizing.
Treatment of anodic oxidation coatings on metal to plug the pores and reduce the absorption capacity of the coating by chemical processes carried out at low temperatures after anodizing.
The part of the product covered or to be covered by the coating and for which the coating is essential for serviceability and/or appearance.
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