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所有能够測定金屬中氫气含量的方法以真空抽气法为最可靠。采用它来分析輕金屬是困难的,因为輕金屬易升华以及析出的气体对所形成的升华物有吸附倾向。分析的困难,一方面在于鋁溶解的氫气很少(在T_熔时液态鋁中的溶解度为0.69厘米~3/100克;);另一方面是鋁的表面能积极地吸附空气中的水分,在分析試样时这些水分分解析出氫,其量要超过金屬中所溶解的气体体积的几
All the methods that can measure the content of hydrogen in the metal are the most reliable by the vacuum extraction method. It is difficult to analyze light metals using it because of the sublimation of light metals and the tendency of the precipitated gases to adsorb the resulting sublimate. The difficulty of the analysis, on the one hand, is that the amount of dissolved hydrogen in aluminum is very small (the solubility in liquid aluminum at T-melt is 0.69 cm -3/100 g); on the other hand, the surface energy of aluminum positively adsorbs Moisture, the moisture in the analysis of samples when the decomposition of hydrogen, the amount of metal dissolved in more than the volume of the gas