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adshaw80, Flickr
Anodized aluminum is aluminum bathed in chemicals, usually acetone, in order to make the metal stronger. Essentially, the aluminum in this process is oxidized. Most metals are weakened when oxidized, aluminum is the exception.
When aluminum is oxidized in this way it forms a hard surface that disperses heat extremely well and evenly. Also, it has a nice, protective finish. Because of this fact, anodized aluminum is often used for high end kitchen ware, such as pots and pans. Consumers will find anodized aluminum in numerous products ranging from MP3 players and sporting equipment to roofs and airplane parts.
Anodizing aluminum is an environmentally friendly process as far as the finishing of metal is concerned. The by-products of this process do not contain heavy metals, halogens or volatiles. The by-products of anodizing that are the most common, aluminum hydroxide and aluminum sulfate are easily recycled for use in the manufacturing of other products such as newspapers, cosmetics and fertilizers.






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