Modeling of pH Distribution Over Corrosion Sites

Modeling of pH Distribution Over Corrosion Sites

Different corrosion reactions were studied as a function of the bulk electrolyte pH, acidic, neutral and alkaline pH. Three variables, H+, OH‘ and dissolved metal ions concentration were modeled along with the water ionization reaction as a homogeneous reaction. Different geometries were selected to...

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Main Author: Maher A. Alodan
Format: Article
Language:English
Published: Elsevier 2003-01-01
Series:Journal of King Saud University: Engineering Sciences
Online Access:http://www.sciencedirect.com/science/article/pii/S101836391830758X
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spelling doaj-cdee456c03514006be2630de01549d922020-11-25T02:50:46ZengElsevierJournal of King Saud University: Engineering Sciences1018-36392003-01-01151111Modeling of pH Distribution Over Corrosion SitesMaher A. Alodan0Department of Chemical Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia, alodan@ksu.edu.saDifferent corrosion reactions were studied as a function of the bulk electrolyte pH, acidic, neutral and alkaline pH. Three variables, H+, OH‘ and dissolved metal ions concentration were modeled along with the water ionization reaction as a homogeneous reaction. Different geometries were selected to simulate metal corrosion around inclusions, similar to A1 and steel alloys corrosion. Modeling showed that reduction of O2 at an inclusion caused the pH to increase at and around the inclusion. Coupling the reaction to dissolution of the surrounding metal matrix showed that the pH was decreased over the anodic dissolution region. The pH distribution was strongly affected by the bulk pH and was confined to 50 μm distance from the surface. Metal ions concentration was found to be affected mostly by the system geometry. Keywords: Heterogeneous reactions, Finite element, aluminum alloys Corrosion, Inclusionshttp://www.sciencedirect.com/science/article/pii/S101836391830758X
collection DOAJ
language English
format Article
sources DOAJ
author Maher A. Alodan
spellingShingle Maher A. Alodan
Modeling of pH Distribution Over Corrosion Sites
Journal of King Saud University: Engineering Sciences
author_facet Maher A. Alodan
author_sort Maher A. Alodan
title Modeling of pH Distribution Over Corrosion Sites
title_short Modeling of pH Distribution Over Corrosion Sites
title_full Modeling of pH Distribution Over Corrosion Sites
title_fullStr Modeling of pH Distribution Over Corrosion Sites
title_full_unstemmed Modeling of pH Distribution Over Corrosion Sites
title_sort modeling of ph distribution over corrosion sites
publisher Elsevier
series Journal of King Saud University: Engineering Sciences
issn 1018-3639
publishDate 2003-01-01
description Different corrosion reactions were studied as a function of the bulk electrolyte pH, acidic, neutral and alkaline pH. Three variables, H+, OH‘ and dissolved metal ions concentration were modeled along with the water ionization reaction as a homogeneous reaction. Different geometries were selected to simulate metal corrosion around inclusions, similar to A1 and steel alloys corrosion. Modeling showed that reduction of O2 at an inclusion caused the pH to increase at and around the inclusion. Coupling the reaction to dissolution of the surrounding metal matrix showed that the pH was decreased over the anodic dissolution region. The pH distribution was strongly affected by the bulk pH and was confined to 50 μm distance from the surface. Metal ions concentration was found to be affected mostly by the system geometry. Keywords: Heterogeneous reactions, Finite element, aluminum alloys Corrosion, Inclusions
url http://www.sciencedirect.com/science/article/pii/S101836391830758X
work_keys_str_mv AT maheraalodan modelingofphdistributionovercorrosionsites
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