Microhardness of decorative gold coatings obtained from gold complex based on mercaptotriazole: Comparison with cyanide
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Dimitrijević, Silvana
Rajčić-Vujasinović, Mirjana M.
Trifunović, Dejan
Trumić, Biserka
Stević, Zoran

Dimitrijević, Stevan

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The aim of this work was to investigate the effects of current density, temperature, pH and concentration of ethyl-hexilsulfonate additive on the microhardness of electrochemically deposited gold decorative coatings obtained from a conventional cyanide electrolyte and gold complex based on mercaptotriazole. Mechanically and chemically prepared brass samples were first nickeled from acidic electrolyte. Nickel was a substrate deposit, and then decorative gold coatings were deposited from two types of electrolytes at different current densities and temperatures. Decorative gold coatings were deposited from auri-mercaptotrizole at different pH values and from electrolyte with and without the ethylhexilsulfonate additive. The microhardness of the gold coating was measured using the Knoop method. The highest values of microhardness were obtained at a current density of 1 A dm(-2) at room temperature for both electrolytes. The microhardness of the gold coatings from cyanide electrolytes was H...K = 740 MPa, and the coatings obtained from auri-mercaptotriazole HK = 660 MPa. This difference is not relevant for decorative purposes. The highest values of microhardness, HK = 660 MPa, were obtained at pH = 9 from the gold complex based on mercaptotriazole without the additive.
Keywords:
Electroplating / Decorative coating of gold / Microhardness / Knoop methodSource:
International Journal of Materials Research, 2016, 107, 7, 624-630Publisher:
- Carl Hanser Verlag, Munich
Funding / projects:
- Development of technologies for recycling of precisious, rare and associated metals from solid waste in Serbia to high purity products (RS-34024)
- Innovative synergy of by-products, waste minimization and clean technologies in metallurgy (RS-34033)
DOI: 10.3139/146.111382
ISSN: 1862-5282
WoS: 000380849500004
Scopus: 2-s2.0-84981731122
Institution/Community
Inovacioni centarTY - JOUR AU - Dimitrijević, Silvana AU - Rajčić-Vujasinović, Mirjana M. AU - Trifunović, Dejan AU - Trumić, Biserka AU - Stević, Zoran AU - Dimitrijević, Stevan PY - 2016 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3224 AB - The aim of this work was to investigate the effects of current density, temperature, pH and concentration of ethyl-hexilsulfonate additive on the microhardness of electrochemically deposited gold decorative coatings obtained from a conventional cyanide electrolyte and gold complex based on mercaptotriazole. Mechanically and chemically prepared brass samples were first nickeled from acidic electrolyte. Nickel was a substrate deposit, and then decorative gold coatings were deposited from two types of electrolytes at different current densities and temperatures. Decorative gold coatings were deposited from auri-mercaptotrizole at different pH values and from electrolyte with and without the ethylhexilsulfonate additive. The microhardness of the gold coating was measured using the Knoop method. The highest values of microhardness were obtained at a current density of 1 A dm(-2) at room temperature for both electrolytes. The microhardness of the gold coatings from cyanide electrolytes was HK = 740 MPa, and the coatings obtained from auri-mercaptotriazole HK = 660 MPa. This difference is not relevant for decorative purposes. The highest values of microhardness, HK = 660 MPa, were obtained at pH = 9 from the gold complex based on mercaptotriazole without the additive. PB - Carl Hanser Verlag, Munich T2 - International Journal of Materials Research T1 - Microhardness of decorative gold coatings obtained from gold complex based on mercaptotriazole: Comparison with cyanide EP - 630 IS - 7 SP - 624 VL - 107 DO - 10.3139/146.111382 ER -
@article{ author = "Dimitrijević, Silvana and Rajčić-Vujasinović, Mirjana M. and Trifunović, Dejan and Trumić, Biserka and Stević, Zoran and Dimitrijević, Stevan", year = "2016", abstract = "The aim of this work was to investigate the effects of current density, temperature, pH and concentration of ethyl-hexilsulfonate additive on the microhardness of electrochemically deposited gold decorative coatings obtained from a conventional cyanide electrolyte and gold complex based on mercaptotriazole. Mechanically and chemically prepared brass samples were first nickeled from acidic electrolyte. Nickel was a substrate deposit, and then decorative gold coatings were deposited from two types of electrolytes at different current densities and temperatures. Decorative gold coatings were deposited from auri-mercaptotrizole at different pH values and from electrolyte with and without the ethylhexilsulfonate additive. The microhardness of the gold coating was measured using the Knoop method. The highest values of microhardness were obtained at a current density of 1 A dm(-2) at room temperature for both electrolytes. The microhardness of the gold coatings from cyanide electrolytes was HK = 740 MPa, and the coatings obtained from auri-mercaptotriazole HK = 660 MPa. This difference is not relevant for decorative purposes. The highest values of microhardness, HK = 660 MPa, were obtained at pH = 9 from the gold complex based on mercaptotriazole without the additive.", publisher = "Carl Hanser Verlag, Munich", journal = "International Journal of Materials Research", title = "Microhardness of decorative gold coatings obtained from gold complex based on mercaptotriazole: Comparison with cyanide", pages = "630-624", number = "7", volume = "107", doi = "10.3139/146.111382" }
Dimitrijević, S., Rajčić-Vujasinović, M. M., Trifunović, D., Trumić, B., Stević, Z.,& Dimitrijević, S.. (2016). Microhardness of decorative gold coatings obtained from gold complex based on mercaptotriazole: Comparison with cyanide. in International Journal of Materials Research Carl Hanser Verlag, Munich., 107(7), 624-630. https://doi.org/10.3139/146.111382
Dimitrijević S, Rajčić-Vujasinović MM, Trifunović D, Trumić B, Stević Z, Dimitrijević S. Microhardness of decorative gold coatings obtained from gold complex based on mercaptotriazole: Comparison with cyanide. in International Journal of Materials Research. 2016;107(7):624-630. doi:10.3139/146.111382 .
Dimitrijević, Silvana, Rajčić-Vujasinović, Mirjana M., Trifunović, Dejan, Trumić, Biserka, Stević, Zoran, Dimitrijević, Stevan, "Microhardness of decorative gold coatings obtained from gold complex based on mercaptotriazole: Comparison with cyanide" in International Journal of Materials Research, 107, no. 7 (2016):624-630, https://doi.org/10.3139/146.111382 . .