Abstract
The quantitative analyses of gas, evoled from commercial and electrolyticnickel were carried out by means of the micro-gas analyser, whose principle is similar to Prescott and Morrison's apparatus. The main components of the evolved gas were carbon mono-oxide, carbon dioxide, hydrogen, water vapour and nitrogen. The rate of evolution of carbon oxide was found to be determinated by the diffusion of oxygen atoms through metal. A considerably large amount of gas was evolved from the electrolytic nickel, but below 450°C only hydrogen was released, while at higher temperature some other kinds of gas were extracted. The activation energy for degassing of hydrogen weire about 5 Kcal/g. atom and 12 Kcal/g. atom for low and high temperature regions respectively. This suggests that there are two mechanisms for the diffusion of hydrogen: one is the normal lattice diffusion and the other is the rift or crystal boundary diffusion.
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