铝合金中氢的测定有许多适用方法,但最好的回答似乎是这些方法的结合。氢是明显溶解于铝中的唯一气体,:其溶解度比许多其他金属中氢的溶解度小。铝中气体问题,是由于在凝固点处液体和固体金属中氢溶解度差别很大而产生。如图1所示,在凝固点,液体对固体溶解度之比约为20:l,因此在金属固化期间氢脱离溶解状 There are many suitable methods for the determination of hydrogen in aluminum alloys, but the best answer seems to be the combination of these methods. Hydrogen is the only gas that appreciably dissolves in aluminum: its solubility is less than the solubility of hydrogen in many other metals. The problem of gas in aluminum is due to the large difference in hydrogen solubility in liquid and solid metals at the freezing point. As shown in Figure 1, at the freezing point, the liquid to solid solubility ratio is about 20: l, so the metal is solidified during hydrogen dissociation