INTEMA 05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
artículos
Título:
The incidence of chromium-rich corrosion products on the efficiency of an imidazoline-based inhibitor used for CO2 corrosion prevention
Autor/es:
L. PAOLINELLI; T. PÉREZ; S. SIMISON
Revista:
MATERIALS CHEMISTRY AND PHYSICS
Editorial:
ELSEVIER SCIENCE SA
Referencias:
Lugar: Amsterdam; Año: 2011 vol. 126 p. 938 - 947
ISSN:
0254-0584
Resumen:
A study has been conducted to analyze the influence of 1% Cr additions, microstructure, and pre-corrosion on the performance of CO2 corrosion inhibitors for CMn steels. Two carbon steels with two different microstructures were tested in a deoxygenated 5 wt.% NaCl solution, saturated with CO2 at 40 C, pH 6. An imidazoline-based inhibitor was added after different pre-corrosion periods. Its performance was studied by means of d.c. electrochemical measurements, SEM and EDS. The results demonstrated a detrimental effect of 1% Cr and pre-corrosion on the inhibitor efficiency. It was also proven that the impact of precorrosion depends on microstructure and chemical composition.
