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Aluminum Extrusions
ARTIFICIAL AGING
An aging process that results in increased strength and hardness using a heating oven.
ALLOY
A substance with metallic properties composed of two or more chemical elements of which at least one is a metal. Aluminum plus one or more other elements, produced to have certain specific desirable characteristics.
BRIGHT DIP
Chemical polishing of aluminum, often by treatment with a mixture of nitric acid and phosphoric acid, yielding a mirror like highly reflective surface. It is almost always followed by anodizing to protect the surface and provide some choice of colors.
BUFFING
Mechanical finishing in which fine abrasives are applied to a metal surface by rotating fabric wheels for the purpose of applying a lustrous finish.
CHEMICAL POLISHING
Improving the surface luster of the aluminum surface by chemical treatment.
ELECTROSTATIC SPRAYING
Application of a coating by applying a static electricity charge to the droplets of a spray and an opposite charge to the part being sprayed, which then attracts the droplets directly to its surface.
ETCHING
Shaping or texturing a metal surface by controlled corrosive action.
HARD COAT ANODIZING
A combined electrical and chemical finishing process for aluminum that produces a hard, colored, protective film on the surface.
HEAT TREATING
Heating and cooling a solid metal or alloy in such a way as to obtain desired conditions or properties. Commonly used as a shop term to denote a thermal treatment to increase strength. Heating for the sole purpose of hot working is excluded from the meaning of this definition.
MILL FINISH
Mill finish is the finish obtained by standard extrusion practices and produced without the aid of any subsequent operations. This finish generally varies from a structural finish with surface imperfections to an architectural finish with uniformly good appearance.
POWDER COATING
Application of a coating in the form of a finely ground powder of coloring agents, resins, and additives; heating of the part, either before or after powder deposition, fuses the powder into a continuous coating.
QUENCHING
Controlled rapid cooling of a metal from an elevated temperature by contact with a liquid, gas, or solid.
STRETCH STRAIGHTENING
The process of stretching extruded sections beyond the yield strength of the alloy to achieve longitudinal straightness
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