Local Electrochemical Investigation of Single Grains of Polycrystalline Cu-16%Zn-8%Al Alloy

• Autor(a) principal: Barragan, Jose T. C. [UNESP]
• Data de Publicação: 2011
• Outros Autores: Blanco, Matildes [UNESP], Barelli, Nilso [UNESP], Della Noce, Rodrigo [UNESP], Fugivara, Cecilio Sadao [UNESP], Fernandez, Javier, Benedetti, Assis Vicente [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S0103-50532011001100013; http://hdl.handle.net/11449/25600
• topic: Cu-Zn-Al alloys; shape memory alloys; single grains; borate buffer; microelectrochemical cell

Local electrochemical studies of single grains of a polycrystalline Cu-16%Zn-8%Al alloy were investigated in borate buffer solution (pH 8.4) by means of microelectrochemical technique. The grain orientations, which were determined by the Laue back-reflection method, were predominantly close to [110] direction, suggesting that the sample was texturized. The open circuit potential measurements showed that the lower steady state potential was observed for the grain which has the highest number of steps on the alloy surface. The cyclic voltammetry experiments suggested that the orientation of Cup follows the substrate one in the Cu-Zn-Al alloy, while CuO grows independently.