Electrochemical production of Al–Mn alloys during the electrodeposition of aluminium in a laboratory cell

Omar Awayssa, Geir Martin Haarberg, Rauan Meirbekova, Gudrun Saevarsdottir

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

This study reports the direct production of an aluminium–manganese alloy during aluminium electrolysis in fluoride-based melts. Experiments were conducted in a laboratory cell dedicated for current efficiency measurements. The temperature was varied from 965–980 °C at a cathodic current density (CCD) of 0.9 A/cm2 and a cryolite ratio (CR) of 2.2. The manganese content was up to 3.0 wt%. Manganese was added in the form of Mn2O3. Bath samples were collected regularly and analyzed with ICP-MS to observe the decay of manganese during electrolysis. It was possible to produce Al-Mn alloys of up to 21 wt. % Mn. Current efficiency for the electrodeposition of Al–Mn alloy was estimated to be in the range of 93%. Current efficiencies with respect to aluminium were estimated. The solidified surfaces of the metal deposits were mostly flat, but some were deformed.

Original languageEnglish
Article number106985
JournalElectrochemistry Communications
Volume125
DOIs
Publication statusPublished - Apr 2021
Externally publishedYes

Keywords

  • Aluminium
  • Aluminium-manganese alloys
  • Current efficiency
  • Electrodeposition
  • Manganese

ASJC Scopus subject areas

  • Electrochemistry

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