An electrochemical impedance study of hydrogen evolution and absorption on Sn-modified steel electrodes |
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| Authors: | L.F.P. Dick M.B. Lisboa E.B. Castro |
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| Affiliation: | (1) Departamento de Metalurgia, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Osvaldo Aranha,99, 6° andar, 90035-190 Porto Alegre, Brazil;(2) Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de La Plata, Suc. 4 C.C. 16, (1900) La Plata, Argentina |
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| Abstract: | In this work we report results related to hydrogen evolution and absorption, on AISI 1045 steel and AISI 1045 steel modified by Sn electrodeposition, in 1 M NaOH. The simulation of experimental impedance, steady-state j/E data and electrochemical permeation data in terms of the Volmer–Heyrovsky mechanism coupled to H absorption and diffusion, allowed the estimation of kinetic and transport parameters leading to an appropriate interpretation of diminished H absorption on Sn modified samples. |
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| Keywords: | hydrogen absorption hydrogen embrittlement hydrogen evolution reaction impedance spectroscopy |
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