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Temperature effect on decorative gold coatings obtained from electrolyte based on mercaptotriazole – comparison with cyanide

  • Silvana B. Dimitrijević , Mirjana M. Rajčić-Vujasinović , Radmila M. Jančić-Hajneman , Jelena B. Bajat , Vlastimir K. Trujić and Dejan D. Trifunović
Published/Copyright: March 8, 2014
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 105 Issue 3

Abstract

The aim of this work was to investigate the effect of temperature on the thickness, surface roughness, visual appearance and morphology of electrochemically deposited gold decorative coatings obtained from conventional cyanide electrolyte (AUROCIN DPB) and electrolyte based on mercaptotriazole (Au-MT). Heating of cyanide electrolyte does not significantly affect the thickness (b) of gold coatings (at 20 °C b = 0.08 μm, at 30 °C b = 0.07 μm and at 40 °C b = 0.08 μm) and, for this reason, the decorative coating processes were carried out at room temperature. Temperature increase has a positive effect on thickness of decorative gold coatings obtained from electrolyte based on mercaptotriazole, but this effect is very small, so the heating of electrolyte is not recommended for this type of electrolyte (at 20 °C b = 0.08 μm, at 40 °C b = 0.12 μm and at 60 °C b = 0.13 μm). The best coating roughness profiles are obtained at a temperature of 20 °C for both types of electrolyte. The morphology of gold deposits, obtained from both electrolytes, was studied using scanning electron microscopy.

Keywords: Electroplating; Decorative gold coating; Surface roughness; EDS
* Correspondence address, Silvana Dimitrijevic M.Sc, Mining and Metallurgy Institute Bor, Zeleni bulevar 35, 19210 Bor, Serbia, Tel.: +381606277888, E-mail:

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Received: 2013-02-02
Accepted: 2013-09-16
Published Online: 2014-03-08
Published in Print: 2014-03-11

© 2014, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111017
Keywords for this article
Electroplating; Decorative gold coating; Surface roughness; EDS

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Twinning dislocation and twin propagation process in a nickel-base single crystal TMS-82 superalloy
  5. Relationship between austenite stability and martensite formation in modified 9Cr-1Mo steel
  6. The influence of brazing temperature and surface roughness on the wettability of reactive brazing alloys
  7. Thermodynamic modelling of the “Cu2O”–SiO2, “Cu2O”– CaO, and “Cu2O”– CaO – SiO2 systems in equilibrium with metallic copper
  8. The effect of annealing temperature on the corrosion behavior of silver alloyed 2205 duplex stainless steel
  9. Effect of rate of deformation on electromagnetic radiation during quasi-static compression of sintered aluminium preforms
  10. Temperature effect on decorative gold coatings obtained from electrolyte based on mercaptotriazole – comparison with cyanide
  11. High-strength and thermally stable Al – CeO2 composite produced by means of mechanical alloying
  12. Enhancing photocatalytic activity of ZnO nanostructures by doping with Ce+4 ions prepared in water using ultrasonic irradiation
  13. Modified hyperbranched epoxy/clay nanocomposites: A study on thermal, antimicrobial and biodegradation properties
  14. Short Communications
  15. Synthesis of carnallite crystal from KCl – MgCl2 solutions and its characterization
  16. Microwave synthesis of ultrafine and nanosized powders of tungsten oxide and carbide
  17. DGM News
  18. DGM News
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