Hydrogen evolution in aqueous solutions containing dissolved H2S: Evidence of direct electroactive contribution of H2S - Archive ouverte HAL Access content directly
Conference Papers Year :

Hydrogen evolution in aqueous solutions containing dissolved H2S: Evidence of direct electroactive contribution of H2S

(1) , (1) , (1) , (2) , (2)
1
2

Abstract

This paper compares the cathodic reactions occurring on steel in an oxygen-free aqueous solution containing dissolved H 2 S or dissolved CO 2. It is well admitted that the rate of the cathodic reaction is enhanced in aqueous solutions containing dissolved CO 2 , in comparison with strong acid solutions at the same pH [1-6]. In a previous paper [7], the authors have shown that this phenomenon appears only in the mass transfer limitation region, where the transport of carbonic acid is added to the transport of proton. In the case of H 2 S containing solutions, this chemical mechanism is no more sufficient to explain the cathodic polarization curves. An additional electrochemical reaction is clearly observed, with strong links with H 2 S concentration.
Fichier principal
Vignette du fichier
1124_Kittel_cathodic-contribution-H2S.pdf (103.83 Ko) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-02464651 , version 1 (03-02-2020)

Identifiers

  • HAL Id : hal-02464651 , version 1

Cite

J. Kittel, F. Ropital, F. Grosjean, Eliane Sutter, Bernard Tribollet. Hydrogen evolution in aqueous solutions containing dissolved H2S: Evidence of direct electroactive contribution of H2S. Eurocorr 2012, Sep 2012, Istambul, Turkey. ⟨hal-02464651⟩
33 View
17 Download

Share

Gmail Facebook Twitter LinkedIn More