Abstract
As the course of the pressure in a vacuum system after an adsorption equilibrium impairment is strongly influenced by the sojourn times of the gas molecules on the surface the idea arose to determine the sojourn times, and consequently the Arrhenius' parameters of desorption, by analysis of the time-pressure curves. The gas release was caused by mechanical action of a tool to a stainless steel sample. Such action was attended by pressure pulse and after it the pressure fell to approximately the initial value. The experiments were carried out at various temperatures of the sample surface and the partial pressures of the released gases were registered. The obtained data for hydrogen were analysed according to a mathematical model describing the time-pressure curves as a multicomponent exponential decay and values of the sojourn times were found. The activation energy and pre-exponential factor for desorption of hydrogen on a stainless steel sample were determined from the Arrhenius' plot.
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