Kinetics of hydrogen evolution lon strained iron surface

The influence of the degree of plastic deformation on overstrain of hydrogen evolution on the surface of armco iron from 3 % NaCl solution with pH=2, pH=7 was studied. It is shown that plastic deformation decreases overstrain of hydrogen evolution. At low densities of the polarizing current plastic deformation (δ=15 %) increases the reaction rate 1.6-1.65 fold, whereas at higher densities of current the reaction rate increases 1.65-2 fold. On the basis of the data obtained the regularities of crack propagation rate are explained, making allowance for the effect of plastic deformation of the crack vertex metal on kinetics of hydrogen evolution