Corrosion behavior of copper with minor alloying addition in chloride solution

Effect of pH on corrosion behavior of CuCrZr in solution without and with NaCl

“…As the potential is further increased, the anodic curves exhibit small peaks due to the formation of CuCl film at a potential of about À0.05 V. At chloride concentrations higher than 0.3 M (0.6 M in the present study), the insoluble CuCl layer transforms into a soluble CuCl À 2 complex [1] and then CuCl À 2 hydrolyzes to form a passive Cu 2 O layer and so a decrease in the corrosion rate can be observed.…”

“…Its advantages include excellent electrical and thermal conductivities, high strength, ease of fabrication, high fatigue resistance and radiation resistance, and low toxicity. Through age-hardening, the mechanical and tribological properties of the alloy can be enhanced while high levels of electrical conductivity can be preserved [1]. CuCrZr has extensive applications such as overhead contact wires for electric railway, electrodes and holders for welding, electrical components working under mechanical stress and spark, lead frame for integrated circuit, moulds and dies for continuous casting metals, and heat sinks for nuclear power reactors.…”

“…On the other hand, report on the corrosion behavior of high copper alloys micro-alloyed with Cr and Zr is scarce. Zhang and his coworkers reported the effect of chloride concentration (0.01-1 M) on the corrosion behavior of CuCr, CuZr and CuCrZr [1]. Significant reduction in corrosion resistance was observed with simultaneous micro-addition of Cr and Zr, compared with addition of Cr or Zr alone.…”

“…Significant reduction in corrosion resistance was observed with simultaneous micro-addition of Cr and Zr, compared with addition of Cr or Zr alone. It was also shown that the element Zr plays a deteriorating role to the Cu 2 O layer while Cr plays an offsetting role [1]. In these reports [1,[5][6][7], the effect of pH on the corrosion behavior of CuCrZr has not been studied, though CuCrZr could be exposed to environments with different pH values.…”

Dissolved-Oxygen-Induced Intensive Pitting Corrosion of Amorphous ZrCu Alloys in Thin NaCl Solutions

“…3 and 4). It was reported that the corrosion rate in the polarization test of crystalline Cu 16 Zr showed the maximum at the NaCl concentration of 0.1 M. 26) It was attributed to the formation of a passive Cu 2 O layer at the Cl À concentrations higher than 0.3 M. Not for the ZrCu-base alloys but for the Fe-base alloys, the maximum corrosion rate was attained at around the NaCl concentration of 9.5 mM and it was explained by the decrease in the dissolved O 2 concentration with the increase in the NaCl concentration.…”