Artículo
Nitrite corrosion inhibition in chloride-rich electrolytes correlated to the electrical properties of surface films on carbon steel
Fecha de publicación:
12/2019
Editorial:
Elsevier
Revista:
Construction And Building Materials
ISSN:
0950-0618
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The electronic properties and the composition of surface films grown in pore simulating solutions are studied using various electrochemical and surface techniques and then correlated to the inhibiting efficiency of nitrite ions in chloride-rich alkaline solutions. In nitrite-free and chloride-rich solutions, the external layer of the surface film is porous, defective and rich in Fe(III). Instead, when nitrite and chloride ions are simultaneously present, the Fe(II) content increases and the film becomes thicker, ordered and more protective. In the absence of nitrite ions, chloride ions induce high donor densities that correlate to a high susceptibility to localized corrosion. In contrast, the donor density decreases noticeably when nitrites and chlorides are both present and also increases with ageing time, reaching values comparable to those calculated for uncontaminated solutions.
Palabras clave:
Nitrite
,
Inhibitors
,
Chloride
,
Steel
Archivos asociados
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Identificadores
Colecciones
Articulos(INTEMA)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Citación
Frontini, María Alejandra; Schreiner, Wido H.; Vazquez, Marcela Vivian; Valcarce, María Beatriz; Nitrite corrosion inhibition in chloride-rich electrolytes correlated to the electrical properties of surface films on carbon steel; Elsevier; Construction And Building Materials; 227; 12-2019; 116650-116650
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