Abstract
The influences of chloride and sulfate ions in natural aqueous solution on the anodic dissolution of copper were investigated using electrochemical techniques. The anodic dissolution mechanisms of copper were proposed using determining the reaction parameters by the anodic polarization curves. The valencies of the copper ions were also determined using channel flow double electrode.The anodic dissolution mechanism changed depending on the concentrations of chloride and sulfate ions in fresh water : specifically, between (1) a concentration range with trace amounts of chloride and sulfate ions, and (2) a concentration range with more than about 100ppm of chloride and sulfate ions. The anodic polarization curve didn't show pH dependence in concentration range (2), but did show pH dependence in concentration range (1). The anodic dissolution mechanisms in concentration range (2) are proposed to be as follows.In the chloride medium :Cu+Cl−=CuCl+e−CuCl+Cl−→CuCl2−In the sulfate medium :Cu+SO42−=CuSO4−ads+e−Cu+CuSO4−ads+2SO42−→CuSO4−ads+Cu(SO4)22−+2e− Cu(SO4)22−=Cu2++2SO42−The influence of silica in fresh water on the anodic polarization curve was discussed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
