Effect of alcohol addition on electroplating of iridium

T. Ohsaka, Y. Matsubara, K. Hirano, Tomoji Ohishi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The effect of some alcohols as additives on the electroplating of iridium in an electrolyte composed of 52 mmol dm-3 sodium hexabromoiridale(III), 0.5 mol dm-3 sodium bromide and 0.5 mol dm-3 sodium sulphate was examined. The addition of alcohols such as 1-butanol, 2-butanol, ethylene glycol and glycerol could significantly keep the current efficiency of iridium plating high during the plating time. The decrease in the current efficiency with increasing plating time in the absence of alcohol was due to the increase in the concentration of hexabromoiridate(IV) ion which was formed by the oxidation of hexabromoiridate(III) ion at the anode and diffused into the electrolyte solution. When an alcohol was added, the hexabromoiridate(IV) ions were chemically reduced back to the hexabromoiridate(III) ions by the alcohol in the electrolyte solution.

Original languageEnglish
Pages (from-to)260-264
Number of pages5
JournalTransactions of the Institute of Metal Finishing
Volume85
Issue number5
DOIs
Publication statusPublished - 2007 Sep

Fingerprint

Iridium
electroplating
Electroplating
iridium
alcohols
Alcohols
plating
Ions
Electrolytes
Iridium plating
electrolytes
Butenes
Plating
ions
Sodium
sodium bromides
1-Butanol
Sodium sulfate
Ethylene Glycol
glycerols

Keywords

  • Alcohol
  • Chemical reduction
  • Current efficiency
  • Electroplating
  • Hexabromoiridate
  • Iridium

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Surfaces and Interfaces
  • Metals and Alloys

Cite this

Effect of alcohol addition on electroplating of iridium. / Ohsaka, T.; Matsubara, Y.; Hirano, K.; Ohishi, Tomoji.

In: Transactions of the Institute of Metal Finishing, Vol. 85, No. 5, 09.2007, p. 260-264.

Research output: Contribution to journalArticle

Ohsaka, T. ; Matsubara, Y. ; Hirano, K. ; Ohishi, Tomoji. / Effect of alcohol addition on electroplating of iridium. In: Transactions of the Institute of Metal Finishing. 2007 ; Vol. 85, No. 5. pp. 260-264.
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