Permanganate-Fluorozirconate conversion coating as precursor for Flash-PEO on AZ31B magnesium alloy

The corrosion resistance of AZ31B magnesium alloy was evaluated after a two-step surface treatment consisting of a permanganate–fluorozirconate conversion layer followed by Flash-PEO in a silicate–fluoride (SiF) electrolyte. Electrochemical tests after 24 hours immersion in 0.5 wt.% NaCl demonstrate...

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Detalhes bibliográficos
Autores: Guerra Mutis, Marlon Hernando, Vega Vega, Jesus Manuel, Matykina, Endzhe, Arrabal Durán, Raúl
Formato: conjunto de datos
Fecha de publicación:2025
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/125555
Acesso em linha:https://hdl.handle.net/20.500.14352/125555
Access Level:acceso abierto
Palavra-chave:620
AZ31B Mg alloy
Permanganate
Fluorizirconate
Conversion Coating
Flash-PEO
XPS
EIS
Corrosion
Precursor
Ingeniería química
Materiales
3312 Tecnología de Materiales
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oai_identifier_str oai:docta.ucm.es:20.500.14352/125555
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spelling Permanganate-Fluorozirconate conversion coating as precursor for Flash-PEO on AZ31B magnesium alloyGuerra Mutis, Marlon HernandoVega Vega, Jesus ManuelMatykina, EndzheArrabal Durán, Raúl620AZ31B Mg alloyPermanganateFluorizirconateConversion CoatingFlash-PEOXPSEISCorrosionPrecursorIngeniería químicaMateriales3312 Tecnología de MaterialesThe corrosion resistance of AZ31B magnesium alloy was evaluated after a two-step surface treatment consisting of a permanganate–fluorozirconate conversion layer followed by Flash-PEO in a silicate–fluoride (SiF) electrolyte. Electrochemical tests after 24 hours immersion in 0.5 wt.% NaCl demonstrated that the structured coating reduced the corrosion rate when compared to the reference Flash-PEO SiF coating ((3.4 ±1.0)x10-6 mm·yr-1 versus (1.3±0.8)x10-5 mm·yr-1). After 72 hours, this trend persisted, with impedance values at low frequency one order of magnitude higher than its counterpart without precursor layer ((1.4±1.0)x107 Ω·cm2 versus (2.6±1.0)x106 Ω·cm2). Notably, Flash-PEO coatings in both cases preserved electrochemical integrity even in the presence of pre-existing surface defects. The permanganate–fluorozirconate precursor layer promoted, after Flash-PEO processing, a distinctive “coral reef-like” morphology with reduced interconnected porosity, thereby enhancing barrier properties by limiting substrate exposure to the corrosive environment. Complementary characterization confirmed the incorporation of zirconium and manganese species, along with compounds typically derived from the Flash-PEO SiF electrolyte.ELSEVIERUniversidad Complutense de Madrid20252025-10-0920252025-10-09datasethttp://purl.org/coar/resource_type/c_ddb1AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/datasetapplication/zipapplication/zipapplication/octet-streamapplication/octet-streamapplication/vnd.openxmlformats-officedocument.wordprocessingml.documenthttps://hdl.handle.net/20.500.14352/125555reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/1255552026-06-02T12:44:21Z
dc.title.none.fl_str_mv Permanganate-Fluorozirconate conversion coating as precursor for Flash-PEO on AZ31B magnesium alloy
title Permanganate-Fluorozirconate conversion coating as precursor for Flash-PEO on AZ31B magnesium alloy
spellingShingle Permanganate-Fluorozirconate conversion coating as precursor for Flash-PEO on AZ31B magnesium alloy
Guerra Mutis, Marlon Hernando
620
AZ31B Mg alloy
Permanganate
Fluorizirconate
Conversion Coating
Flash-PEO
XPS
EIS
Corrosion
Precursor
Ingeniería química
Materiales
3312 Tecnología de Materiales
title_short Permanganate-Fluorozirconate conversion coating as precursor for Flash-PEO on AZ31B magnesium alloy
title_full Permanganate-Fluorozirconate conversion coating as precursor for Flash-PEO on AZ31B magnesium alloy
title_fullStr Permanganate-Fluorozirconate conversion coating as precursor for Flash-PEO on AZ31B magnesium alloy
title_full_unstemmed Permanganate-Fluorozirconate conversion coating as precursor for Flash-PEO on AZ31B magnesium alloy
title_sort Permanganate-Fluorozirconate conversion coating as precursor for Flash-PEO on AZ31B magnesium alloy
dc.creator.none.fl_str_mv Guerra Mutis, Marlon Hernando
Vega Vega, Jesus Manuel
Matykina, Endzhe
Arrabal Durán, Raúl
author Guerra Mutis, Marlon Hernando
author_facet Guerra Mutis, Marlon Hernando
Vega Vega, Jesus Manuel
Matykina, Endzhe
Arrabal Durán, Raúl
author_role author
author2 Vega Vega, Jesus Manuel
Matykina, Endzhe
Arrabal Durán, Raúl
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 620
AZ31B Mg alloy
Permanganate
Fluorizirconate
Conversion Coating
Flash-PEO
XPS
EIS
Corrosion
Precursor
Ingeniería química
Materiales
3312 Tecnología de Materiales
topic 620
AZ31B Mg alloy
Permanganate
Fluorizirconate
Conversion Coating
Flash-PEO
XPS
EIS
Corrosion
Precursor
Ingeniería química
Materiales
3312 Tecnología de Materiales
description The corrosion resistance of AZ31B magnesium alloy was evaluated after a two-step surface treatment consisting of a permanganate–fluorozirconate conversion layer followed by Flash-PEO in a silicate–fluoride (SiF) electrolyte. Electrochemical tests after 24 hours immersion in 0.5 wt.% NaCl demonstrated that the structured coating reduced the corrosion rate when compared to the reference Flash-PEO SiF coating ((3.4 ±1.0)x10-6 mm·yr-1 versus (1.3±0.8)x10-5 mm·yr-1). After 72 hours, this trend persisted, with impedance values at low frequency one order of magnitude higher than its counterpart without precursor layer ((1.4±1.0)x107 Ω·cm2 versus (2.6±1.0)x106 Ω·cm2). Notably, Flash-PEO coatings in both cases preserved electrochemical integrity even in the presence of pre-existing surface defects. The permanganate–fluorozirconate precursor layer promoted, after Flash-PEO processing, a distinctive “coral reef-like” morphology with reduced interconnected porosity, thereby enhancing barrier properties by limiting substrate exposure to the corrosive environment. Complementary characterization confirmed the incorporation of zirconium and manganese species, along with compounds typically derived from the Flash-PEO SiF electrolyte.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025-10-09
2025
2025-10-09
dc.type.none.fl_str_mv dataset
http://purl.org/coar/resource_type/c_ddb1
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/dataset
format dataset
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/125555
url https://hdl.handle.net/20.500.14352/125555
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
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dc.publisher.none.fl_str_mv ELSEVIER
publisher.none.fl_str_mv ELSEVIER
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
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