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An electrochemical impedance study of hydrogen evolution and absorption on Sn-modified steel electrodes

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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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Authors and Affiliations

  1. Departamento de Metalurgia, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Osvaldo Aranha,99, 6° andar, 90035-190, Porto Alegre, Brazil

    L.F.P. Dick & M.B. Lisboa

  2. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de La Plata, Suc. 4 C.C. 16, (1900), La Plata, Argentina

    E.B. Castro

Authors
  1. L.F.P. Dick
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  2. M.B. Lisboa
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  3. E.B. Castro
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Correspondence to L.F.P. Dick.

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Dick, L., Lisboa, M. & Castro, E. An electrochemical impedance study of hydrogen evolution and absorption on Sn-modified steel electrodes. Journal of Applied Electrochemistry 32, 883–889 (2002). https://doi.org/10.1023/A:1020503726068

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