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Quartz microbalance investigation of metal deposition from dilute solutions

✍ Scribed by H.-J. Schmidt; U. Pittermann; H. Schneider; K.G. Weil

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
441 KB
Volume
273
Category
Article
ISSN
0003-2670

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✦ Synopsis

A quartz microbalance was used to determine the cathodic deposition of lead (5 4 pg l-'-O 3 mg I-') and copper (16 wg l-*-O 7 mg I-') from ddute solutions It was found that the removal of lead can be nearly complete when the total amount m the solution does not exceed the monolayer capacity of the electrode Sunultaneously anth the formation of this monolayer, Au-Pb alloys are formed These alloys also form when the electrode IS held at a UPD (under potential deposition) potential They were ldenttied by electron diffraction as Au,Pb, AuPb, and AuPb, The alloy formation can easdy be detected from anodlc stnppmg curves With copper solutions, the deposition IS quantltatnre throughout the exanuned range of concentrations In contrast to the lead deposrtlon, mainly bulk copper was formed m addltlon to &-Au alloys

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