INTEMA 05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
artículos
Título:
Influence of the microstructure on the corrosion behaviour of a shape memory Cu-Al-Be alloy in a marine environment
Autor/es:
S. MONTECINOS ; S. N. SIMISON
Revista:
APPLIED SURFACE SCIENCE
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2011 vol. 257 p. 2737 - 2744
ISSN:
0169-4332
Resumen:
The influence of the microstructure on the corrosion behaviour of a shape memory Cu11.40Al0.55Be (wt.%) polycrystalline alloy in 3.5% NaCl has been studied by microscopical examinations, spectroscopical and X-ray diffraction measurements, and electrochemical tests. Chloride environment can produce a dealuminization attack, and the corrosion behaviour is affected by the alloy microstructural conditions. After long times of immersion, the single beta-phase microstructure suffers localized corrosion in some regions but dealuminization is generalized on the whole surface. However, in the (Beta+Gamma2) microstructure, preferential dissolution of gamma2 dendritic precipitates occurs, which seems to protect beta matrix from dealloying.
