Title
Electrodeposited nanocrystalline bronze alloys as replacement for Ni
Author
Hovestad, A.
Tacken, R.A.
't Mannetje, H.H.
TNO Industrie en Techniek
Publication year
2008
Abstract
Nanocrystalline white-bronze, CuSn, electroplating was investigated as alternative to Ni plating as undercoat for noble metals in jewellery applications. A strongly acidic plating bath was developed with an organic additive to suppress hydrogen evolution and obtain bright coatings. Polarization curves indicate a strong inhibition by the organic additive at the tin equilibrium potential. Mass transfer controlled deposition yields nanocrystalline bronze coating with 0-65 wt% Sn. One or two low temperature equilibrium phases, high temperature equilibrium phases or a non-equilibrium phase were identified by XRD analyses. Bright white bronze, 50 wt% Cu/50 wt% Sn, bronze coatings show improved tarnishing resistance and similar corrosion and wear resistance as undercoat for gold on actual jewellery parts compared to nickel. © 2008 WILEY-VCH Verlag GmbH & Co. KGaA.
Subject
Materials
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TNO identifier
347321
ISSN
1862-6351
Source
2007 E-MRS Fall Meeting Symposium B: Chemical and Electrochemical Synthesis of Advanced Materials and Nanostructures on Solid Surfaces: Growth Mechanisms, Characterizations and Applications, 17-21 September 2007, Warsaw, Poland. Conference code: 79980, 5 (11), 3506-3509
Document type
conference paper