Electrodeposición de aleaciones de Co-Ni. Determinación de características y efectos para su utilización en monedas

DIEGO S. SCHWECKANDT , MARÍA DEL CARMEN AGUIRRE,

Pto Iguazu-Misiones

Congreso; 13° Congreso Internacional en Ciencia y Tecnologia de Metalurgia y Materiales SAM/CONAMET2013; 2013

Universidad Nacional de Misiones-CONICET -SAM-SOCHIM

Our purpose is to look for new materials of Ni, Co or Cu and their combination, useful for blanks for coins. Thus, the objective is to change the old techniques in the fabrication of blanks, of higher cost, by direct current methods. . On the subject suitable material for circulating coins, we focused on the synthesis of new alloys of NiCo over brass, by potentiostatic methods, studying the physicochemical and mechanical properties. NixCo100-x alloys and pure Ni and Co, were electrodeposited over foil brass (CuZn) p.a (width: 0.03mm), by cyclic voltammetry (CV) and constant potential (CP). The measurements a by spectrometry of X-Ray fluorescence (EDXRF), microprobe (EDS) and SEM, showed NixCo100-X alloys but enrichment of Co and granular morphology. The material was also characterized by X-ray diffraction showing (fcc) and (hcp) phases in accordance with the NiCo composition, and the surface hardness assay, roughness and conductivity tests were also performed, obtaining specific properties, suitable for a coinage materials.