info:eu-repo/semantics/article
Polarisation behaviour of Al–Zn–Ga alloy in chloride medium
Registro en:
Flamini, Daniel Omar; Saidman, Silvana Beatriz; Polarisation behaviour of Al–Zn–Ga alloy in chloride medium; Springer; Journal of Applied Electrochemistry; 38; 5; 9-5-2008; 663-668
0021-891X
1572-8838
CONICET Digital
CONICET
Autor
Flamini, Daniel Omar
Saidman, Silvana Beatriz
Resumen
The electrochemical response of Al-Zn-Ga alloy in chloride medium was studied. For this purpose, linear sweep voltammetry and open circuit potential (OCP) measurements were employed and surface characterisation was performed by scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) analysis. The presence of Ga whether as alloyed element in the ternary alloy or deposited from the electrolyte solution onto pure Al or onto Al-Zn alloy causes a displacement of the onset of the process of dissolution towards more negative potential in a chloride solution. The anodic behaviour of the Al-Zn-Ga alloy can be interpreted in terms of an amalgam mechanism, where the homogeneously distribution of Ga in the alloy assures the formation of a superficial Ga-Al amalgam. Fil: Flamini, Daniel Omar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina Fil: Saidman, Silvana Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina