Abstract
The rate of hydrogen absorption into a potentiostatically polarized titanium was measured by using the nuclear chemical method, which was proposed in the previous report. The method consisted of the polarization, or the corrosion, of test specimen in a DC1-D2O solution and the bombardment of deuterons with the Cockcroft-Walton accelerator. The amount of absorbed deuterium was estimated from the counting rate of neutrons.
Remarkable absorption was observed at more basic potential than -0.65V vs. S.C.E. and the rate of absorption increased with higher cathodic polarization. The growth of the hydrogen-absorbed layer obeyed the linear rate law rather than the Fick's diffusion law. These facts suggested that the some surface process would control the rate. Relatively high proportion such as 40 to 50%, in comparison with the electrochemical evolution of hydrogen, was observed at the potential region ranging from -1.1 to -1.3V.
