Electrochemical studies of cooper, nickel and a Cu55/Ni45 alloy in aqueous sodium acetate

AUTOR(ES)

Goncalves, Reinaldo Simoes

DATA DE PUBLICAÇÃO

2010

RESUMO

This paper discusses the electrochemical behavior of copper, nickel and a copper/nickel alloy in aerated aqueous 0.10 and 1.0 mol L-1 sodium acetate. The data obtained from different electrochemical techniques were analyzed to determine the influence of Ni and Cu on the electrochemical processes of the alloy electrode. The shapes of the potentiodynamic I(E) curves of the alloy were found to be quite similar to those of the Ni voltamograms. Although the anodic current densities of Ni and the alloy increased with greater concentrations of acetate, the opposite effect occurred in Cu. The impedance measurements taken at the open circuit potential revealed that the polarization resistance (RP) of the electrodes decreased in the following order: Ni > Alloy > Cu. With increasing concentrations of acetate, the RP of the alloy and the Cu increased while that of the Ni electrode decreased.

ASSUNTO(S)

ligas de cobre : comportamento eletroquímico acetate corrosao copper/nickel acetato corrosion

Documentos Relacionados

• Electrochemical studies of copper, nickel and a Cu55/Ni45 alloy in aqueous sodium acetate
• Electrochemical behavior of Cu-9%Al-5%Ni-2%Mn alloy in chloride media
• Recrystallization of a Ti-45Ni-5Cu cold-worked shape memory alloy characterized by thermoelectric power and electrical properties
• John A. D. Cooper, M.D., 1909–2002
• The Electrochemical Behavior of the NiTi Alloy in Different Simulated Body Fluids