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A systematic investigation of current efficiency during brass deposition from a pyrophosphate electrolyte using RDE, RCE, and QCM

Lookup NU author(s): David Page, Professor Sudipta Roy


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The pyrophosphate electrolyte has been used for brass deposition as a replacement for cyanide electrolytes. However, there is considerable confusion about the current efficiency of brass deposition from this electrolyte. This study uses a rotating disc electrode (RDE), a rotating cylinder electrode (RCE) and a quartz crystal microbalance (QCM) to systematically determine the current efficiency of copper, zinc, and brass deposition from a pyrophosphate electrolyte. Electrodeposition of brass on RCE and QCM show that the current efficiency for copper, zinc as well as brass is well below 100%. Simultaneous measurement of current and frequency at a QCM showed that pyrophosphate is adsorbed at the electrode surface during copper reduction. However, when zinc is present in the solution, pyrophosphate adsorption is blocked.

Publication metadata

Author(s): Johannsen K, Page D, Roy S

Publication type: Article

Publication status: Published

Journal: Electrochimica Acta

Year: 2000

Volume: 45

Issue: 22

Pages: 3691-3702

Print publication date: 28/07/2000

ISSN (print): 0013-4686

ISSN (electronic): 1873-3859

Publisher: Elsevier Science Ltd


DOI: 10.1016/S0013-4686(00)00461-8


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