Efficient growth of anodic films on magnesium in organic electrolytes containing fluoride and water

Hiroki Habazaki, Fumitaka Kataoka, Etsushi Tsuji, Yoshitaka Aoki, Shinji Nagata, Peter Skeldon, George E. Thompson

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The present study reports, for the first time, the highly efficient formation of barrier-type anodic films, with flat and parallel metal/film and film/electrolyte interfaces, on magnesium in ethylene glycol electrolytes containing ammonium fluoride and water. The anodizing voltage increases linearly with time during galvanostatic anodizing at 10 A m- 2 up to 350 V. The anodic film formed to 200 V is 247 nm thick, containing a crystalline MgF2 phase. Analysis by Rutherford backscattering spectroscopy discloses the film composition of MgF1.8O0.1 and Pilling-Bedworth ratio (PBR) of 1.67. The PBR value greater than unity and the formation of chemically stable fluoride-based films may contribute to the film growth at high current efficiency.

Original languageEnglish
Pages (from-to)30-32
Number of pages3
JournalElectrochemistry Communications
Volume46
DOIs
Publication statusPublished - 2014 Sep

Keywords

  • Anodic film
  • Anodizing
  • Fluoride
  • Magnesium
  • Organic electrolyte

ASJC Scopus subject areas

  • Electrochemistry

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