The electrodissolution and passivation of mild steel in alkaline sulphide solutions

Autores
Salvarezza, Roberto Carlos; Videla, Héctor A.; Arvia, Alejandro Jorge
Año de publicación
1981
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The electrodissolution and passivation of mild steel in alkaline sulphide solutions at 25°C is investigated by the use of steady state and transient electrochemical techniques and by scanning electron microscopy and energy dispersive X-ray analysis. The electrodissolution and passivation processes are explained by the initial competitive adsorption of OH−, HS− and H2O and the subsequent charge transfer and proton transfer processes involving the OH and HS adsorbed species. The former is responsible for the passivation of the metal by an oxide metal layer while the second species undergoes two different reactions yielding in one case a precipitated mackinawite film on the metal, which is a poorly protective layer, and in the other a soluble Fe(II) species which can be detected by chemical analysis. The contribution of the reactions starting from each adsorbed species depends on the HS−/OH− concentration ratio in the solution. The initiation of pitting on iron is also explained through the postulated reaction pattern.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Facultad de Ciencias Exactas
Materia
Ciencias Exactas
Química
Acero
Sulfuros
Metales Alcalinos
Hierro
Técnicas Electroquímicas
scanning electron microscopy
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/82558
Acceder
id SEDICI_9d915321596c3db7049a6284e80078da
oai_identifier_str oai:sedici.unlp.edu.ar:10915/82558
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling The electrodissolution and passivation of mild steel in alkaline sulphide solutionsSalvarezza, Roberto CarlosVidela, Héctor A.Arvia, Alejandro JorgeCiencias ExactasQuímicaAceroSulfurosMetales AlcalinosHierroTécnicas Electroquímicasscanning electron microscopyThe electrodissolution and passivation of mild steel in alkaline sulphide solutions at 25°C is investigated by the use of steady state and transient electrochemical techniques and by scanning electron microscopy and energy dispersive X-ray analysis. The electrodissolution and passivation processes are explained by the initial competitive adsorption of OH−, HS− and H2O and the subsequent charge transfer and proton transfer processes involving the OH and HS adsorbed species. The former is responsible for the passivation of the metal by an oxide metal layer while the second species undergoes two different reactions yielding in one case a precipitated mackinawite film on the metal, which is a poorly protective layer, and in the other a soluble Fe(II) species which can be detected by chemical analysis. The contribution of the reactions starting from each adsorbed species depends on the HS−/OH− concentration ratio in the solution. The initiation of pitting on iron is also explained through the postulated reaction pattern.Instituto de Investigaciones Fisicoquímicas Teóricas y AplicadasFacultad de Ciencias Exactas1981-11-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf815-829http://sedici.unlp.edu.ar/handle/10915/82558enginfo:eu-repo/semantics/altIdentifier/issn/0010-938Xinfo:eu-repo/semantics/altIdentifier/doi/10.1016/0010-938X(82)90078-6info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:15:31Zoai:sedici.unlp.edu.ar:10915/82558Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:15:32.24SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv The electrodissolution and passivation of mild steel in alkaline sulphide solutions
title The electrodissolution and passivation of mild steel in alkaline sulphide solutions
spellingShingle The electrodissolution and passivation of mild steel in alkaline sulphide solutions
Salvarezza, Roberto Carlos
Ciencias Exactas
Química
Acero
Sulfuros
Metales Alcalinos
Hierro
Técnicas Electroquímicas
scanning electron microscopy
title_short The electrodissolution and passivation of mild steel in alkaline sulphide solutions
title_full The electrodissolution and passivation of mild steel in alkaline sulphide solutions
title_fullStr The electrodissolution and passivation of mild steel in alkaline sulphide solutions
title_full_unstemmed The electrodissolution and passivation of mild steel in alkaline sulphide solutions
title_sort The electrodissolution and passivation of mild steel in alkaline sulphide solutions
dc.creator.none.fl_str_mv Salvarezza, Roberto Carlos
Videla, Héctor A.
Arvia, Alejandro Jorge
author Salvarezza, Roberto Carlos
author_facet Salvarezza, Roberto Carlos
Videla, Héctor A.
Arvia, Alejandro Jorge
author_role author
author2 Videla, Héctor A.
Arvia, Alejandro Jorge
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
Acero
Sulfuros
Metales Alcalinos
Hierro
Técnicas Electroquímicas
scanning electron microscopy
topic Ciencias Exactas
Química
Acero
Sulfuros
Metales Alcalinos
Hierro
Técnicas Electroquímicas
scanning electron microscopy
dc.description.none.fl_txt_mv The electrodissolution and passivation of mild steel in alkaline sulphide solutions at 25°C is investigated by the use of steady state and transient electrochemical techniques and by scanning electron microscopy and energy dispersive X-ray analysis. The electrodissolution and passivation processes are explained by the initial competitive adsorption of OH−, HS− and H2O and the subsequent charge transfer and proton transfer processes involving the OH and HS adsorbed species. The former is responsible for the passivation of the metal by an oxide metal layer while the second species undergoes two different reactions yielding in one case a precipitated mackinawite film on the metal, which is a poorly protective layer, and in the other a soluble Fe(II) species which can be detected by chemical analysis. The contribution of the reactions starting from each adsorbed species depends on the HS−/OH− concentration ratio in the solution. The initiation of pitting on iron is also explained through the postulated reaction pattern.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Facultad de Ciencias Exactas
description The electrodissolution and passivation of mild steel in alkaline sulphide solutions at 25°C is investigated by the use of steady state and transient electrochemical techniques and by scanning electron microscopy and energy dispersive X-ray analysis. The electrodissolution and passivation processes are explained by the initial competitive adsorption of OH−, HS− and H2O and the subsequent charge transfer and proton transfer processes involving the OH and HS adsorbed species. The former is responsible for the passivation of the metal by an oxide metal layer while the second species undergoes two different reactions yielding in one case a precipitated mackinawite film on the metal, which is a poorly protective layer, and in the other a soluble Fe(II) species which can be detected by chemical analysis. The contribution of the reactions starting from each adsorbed species depends on the HS−/OH− concentration ratio in the solution. The initiation of pitting on iron is also explained through the postulated reaction pattern.
publishDate 1981
dc.date.none.fl_str_mv 1981-11-15
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/82558
url http://sedici.unlp.edu.ar/handle/10915/82558
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0010-938X
info:eu-repo/semantics/altIdentifier/doi/10.1016/0010-938X(82)90078-6
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
815-829
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
_version_ 1844616027492581376
score 13.070432

Publicaciones similares