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electrochemical-hydrogen-permeation
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Electrochemical charging of H in sour simulated environment in steel
, Article European Corrosion Congress 2011, EUROCORR 2011 ; Volume 4 , 2011 , Pages 2978-2988 ; 9781618394125 (ISBN) ; Dolati, A ; Bolzoni, F ; Lazzari, L ; Sharif University of Technology
2011
Abstract
The hydrogen diffusivity and subsurface concentration (C app) were evaluated by fitting a series expansion of the diffusion equation to the permeation data. The hydrogen diffusivity in the steel was found to be approximately in a order of magnitude 10 -7 cm 2 s -1. The influence of the passive layer on the hydrogen permeation and its influence on the evaluation of diffusion and trapping characteristics were discussed. Hydrogen diffusion experiments in A106 GRB carbon steel pipeline were performed electrochemically at 25°C in NACE B, solution in various amount of sulphide ion concentrations. In this case the effect of concentration of sulphide ion evaluated by study the electrochemical...
Study of electrochemical hydrogen permeation in iron
, Article Journal of Corrosion Science and Engineering ; Volume 14 , February , 2011 , 263–267 ; 14668858 (ISSN) ; Dolati, A ; Lazzari, L ; Bolzoni, F ; Sharif University of Technology
Abstract
Hydrogen diffusion experiments in A106GR B carbon steel pipeline were performed electrochemically at 25°C in NACE,B, solution in various amount of sulfide ion concentration for a thin sample. In this case the effect of concentration of sulfide ion evaluated by study the electrochemical behavior of sample by the galvanostatic way. Generally, sulfur components were found to increase the hydrogen permeation rate. Presence of sulfide layer helped to absorption of hydrogen reduction and exacerbates the amount of hydrogen absorption in steel. this phenomena can be noted that as regard to analysis of corrosion products which formed in the surface sample, the high amount of FeS, The sulfide ion are...