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Encyclopedia > Aluminum

Aluminum is a soft and lightweight metal with a dull silvery appearance, due to a thin layer of oxidation that forms quickly when it is exposed to air. Aluminum is about one-third as dense as steel or copper; is malleable, ductile, and easily machined and cast; and has excellent corrosion resistance and durability due to the protective oxide layer. It is also nonmagnetic and nonsparking and is the second most malleable metal (after gold) and the sixth most ductile.

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Aluminum Casting Processes (2063 words)
Aluminum is one of the few metals that can be cast by all of the processes used in casting metals.
Aluminum die castings weighing up to about 5 kg are common, but castings weighing as much as 50 kg are produced when the high tooling and casting-machine costs are justified.
Aluminum alloys commonly used for investment castings are 208.0, 295.0, 308.0, 355.0, 356.0, 443,0, 514.0, 535.0 and 712.0.
Aluminum (2101 words)
Aluminum appears to be a copper antagonist as is cadmium.
The levels of aluminum found in spleen were significantly increased by gluconic and ascorbic acids, whereas gluconic and oxalic acids also raised the concentrations of aluminum found in kidneys.
Aluminum toxicity has to be considered a primary way that copper gets depleted, and hence a primary cause of the copper deficiency diseases: collagen failure, hernias, high cholesterol, heart disease, aneurysms, and hyperthyroidism.
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