Nanodistribution of the dissolved hydrogen and deuterium in near surface area of metals

摘要

Results of experiment shows, that concentration of the hydrogen dissolved in the stainless steel type 304 after keeping in normal atmosphere (partial pressure of hydrogen P_(H2) = 5~*10~(-2)Pa, partial pressure of deuterium P_(D2)=7~*10~(-6) Pa) is C_(H2) = 2~*10~(19) at/sm~3, instead of theoretically expected C_(H2) = 2~*10~(19) at/sm~3, similarly, for deuterium, dissolved at P_(D2) = 7~*10~(-6)Pa, its concentration, instead of theoretically expected C_(D2)~(theor) = 8~*10~(15) at/sm~3 is C_(D2) = 1~*10~(18) at/sm~3. As for hydrogen also as for deuterium it is possible to explain their increased concentration by the relay dissociation of sorbed water The results show that the residual atmosphere of hydrogen or deuterium influences on ions exchange processes of deuterium and hydrogen in layers of sorbed water. So, in the submitted results it is enough 0,002% dissociation of sorbed water to ensure the pointed mentioned concentration. Experiment with the sample keeping (during 76 days) in the atmosphere of deuterium at pressure P_(D2) = 5~*10~(-4)Pa shows, that the maximal concentration of the dissolved deuterium is C_(D2) = 1~*10~(18) at/sm~3, that is about eight times less than expected theoretically. Concentration of the dissolved gases (N=6000 cycles, σ= 1500 MPa, n = 600 cont/s) grows up to C_(H2)~(max) = 2~*10~(21) at/sm~3 and C_(D2)~(max) = 3~*10~(19) at/sm~3 as a result of mechanical action influence that corresponds to the 8,5% dissociation of H_2O, and corresponds to 0,1% dissociation of HDO. So it was shown that the friction processes stimulates the process of sorbed water dissociation.