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密度小于5g/cm3的金属叫做轻金属,例如铝、镁、钠、钾、钙、锶、钡等。也包括部分稀有金属。轻金属一般密度小,化学活性大。由于特殊的物理和化学性质,轻金属在现代工业中得到了广泛的使用。其中铝是轻金属中用量最大的一种,其产量和消费量均仅次于钢铁,是第二大金属。1职业危害
Metals having a density of less than 5 g / cm3 are called light metals such as aluminum, magnesium, sodium, potassium, calcium, strontium, barium and the like. Also includes some rare metals. Light metal generally low density, chemical activity. Due to the special physical and chemical properties, light metals are widely used in modern industry. Among them, aluminum is the largest amount of light metal, its output and consumption are second only to steel, is the second largest metal. 1 Occupational hazards