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所有铝合金中都含有氢,其含量为所含气体总量的70～90％。铝中氢的主要来源,是水蒸气与铝反应生成氧化物的同时放出初生氢。其次的一个重要来源是未充分燃烧的燃料或润滑剂中的碳氢化合物,以及可能混入熔化炉料中的其他有机物质。也有人提到铝表面上的氢氧化物薄膜也是氢的一个来源。完全除去氢,在工业上是不可能的,但是,有多种方法可以把它的含量降低到允许的范围内,其中最常用的方法是真空处理和向铝液
All aluminum alloys contain hydrogen in an amount of 70-90% of the total gas content. The main source of hydrogen in aluminum is the generation of nascent hydrogen while reacting with aluminum to generate oxides. A second important source is hydrocarbons from underfired fuels or lubricants, as well as other organic materials that may be mixed into the melting charge. Others have also mentioned that the hydroxide film on the aluminum surface is also a source of hydrogen. Complete removal of hydrogen is industrially impossible, however, there are a number of ways to reduce its content to within the allowable range. The most common of these methods is vacuum treatment and conversion to molten aluminum