Abstract
The authors study the influence of hydrogen and high temperatures on the hydrogen retaining properties of diffusion titanium coatings and also of the thermal stability of such coatings in a hydrogen atmosphere. The diffusion titanium coating of 12Kh18N10T and U8 steels was done by the contact method in powder mixtures consisting of the compounds FeTi and Al/sub 2/O/sub 3/ and the activators NH/sub 4/Cl and NH/sub 4/F x HF. The results of the investigations make it possible to conclude that diffusion titanium coatings protect metals from the penetration of gaseous hydrogen at increased temperatures but their effectiveness depends upon the phase and chemical composition of the base metal.
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