A comparative pitting corrosion study of mild steel in different alkaline solutions containing salts with sulphur-containing anions

The localized corrosion of mild steel in alkaline solutions containing a salt with a sulphurcontaining anion (sodium sulphate, sodium sulphite, sodium thiosulphate, potassium thiocyanate and sodium sulphide) is studied by using potentiostatic and potentiodynamic techniques complemented with scanning...

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Autores principales: Vásquez Moll, Victor Dennis, Salvarezza, Roberto Carlos, Videla, Héctor A., Arvia, Alejandro Jorge
Formato: Articulo
Lenguaje:Inglés
Publicado: 1984
Materias:
Ciencias Exactas
Química
Corrosion
Mild steel
Alkaline solutions
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/118386
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-118386
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Química
Corrosion
Mild steel
Alkaline solutions
spellingShingle Ciencias Exactas
Química
Corrosion
Mild steel
Alkaline solutions
Vásquez Moll, Victor Dennis
Salvarezza, Roberto Carlos
Videla, Héctor A.
Arvia, Alejandro Jorge
A comparative pitting corrosion study of mild steel in different alkaline solutions containing salts with sulphur-containing anions
topic_facet Ciencias Exactas
Química
Corrosion
Mild steel
Alkaline solutions
description The localized corrosion of mild steel in alkaline solutions containing a salt with a sulphurcontaining anion (sodium sulphate, sodium sulphite, sodium thiosulphate, potassium thiocyanate and sodium sulphide) is studied by using potentiostatic and potentiodynamic techniques complemented with scanning electron microscopy. Alkaline solutions containing one of those salts produce pitting of mild steel at potential values more positive than those of the active-passive transition of iron in base. In the presence of either thiocyanate or thiosulphate anion iron pitting takes place through sulphide formation which reacts at the electrode surface yielding poorly protective ferrous sulphide. At potential more positive than the breakdown potential the kinetic behaviour fits a competitive surface reaction mechanism involving the formation of the passive film and the nucleation and growth of a ferrous sulphide salt layer. The proposed reaction model reproduces the corresponding experimental current-transients.
format Articulo
Articulo
author Vásquez Moll, Victor Dennis
Salvarezza, Roberto Carlos
Videla, Héctor A.
Arvia, Alejandro Jorge
author_facet Vásquez Moll, Victor Dennis
Salvarezza, Roberto Carlos
Videla, Héctor A.
Arvia, Alejandro Jorge
author_sort Vásquez Moll, Victor Dennis
title A comparative pitting corrosion study of mild steel in different alkaline solutions containing salts with sulphur-containing anions
title_short A comparative pitting corrosion study of mild steel in different alkaline solutions containing salts with sulphur-containing anions
title_full A comparative pitting corrosion study of mild steel in different alkaline solutions containing salts with sulphur-containing anions
title_fullStr A comparative pitting corrosion study of mild steel in different alkaline solutions containing salts with sulphur-containing anions
title_full_unstemmed A comparative pitting corrosion study of mild steel in different alkaline solutions containing salts with sulphur-containing anions
title_sort comparative pitting corrosion study of mild steel in different alkaline solutions containing salts with sulphur-containing anions
publishDate 1984
url http://sedici.unlp.edu.ar/handle/10915/118386
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