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在不同的试验室用五种不同的方法,测定了一系列铝-镁合金的氢含量。所获得的结果是一致的,这表明用Telegas法、氮载体融合法和三种热除气法测出的定量结果是正确的。在这些分析中,主要的问题是任何处理金属蒸气与水蒸气反应生成的氢和在富镁层中被吸收的氢。在材料铸造过程中和在随后热加工过程中,氢的浓度没有变化。然而,发现在580℃的空气中退火时,氢从材料中向外扩散。这种影响对放置在局部水蒸气压低(650帕)的气氛中的材料来说,是最大的。
Five different methods were used in different laboratories to determine the hydrogen content of a series of aluminum-magnesium alloys. The results obtained are consistent, indicating that the quantitative results obtained by the Telegas method, nitrogen carrier fusion method and the three hot-outgassing methods are correct. In these analyzes, the major problem is any treatment of hydrogen generated by the reaction of the metal vapor with steam and hydrogen absorbed in the magnesium-rich layer. There was no change in the hydrogen concentration during the casting of the material and in the subsequent hot working. However, hydrogen was found to diffuse outwardly from the material when annealed in air at 580 ° C. This effect is greatest for materials placed in an atmosphere with a low local water vapor pressure (650 Pa).