Extraction of nonmetallic inclusion particles containing MgO from steel

Ryo Inoue, Shigeru Ueda, Tatsuro Ariyama, Hideaki Suito

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)


Extraction of inclusion particles from a metal matrix allows for accurate three-dimensional estimation of their morphology, size, and composition. In this study, the stability of MgO and MgAl 2O 4 particles was examined using acid, halogen-methanol, and nonaqueous electrolytes. These particles hardly dissolved in a 2% TEA-Ba (2 v/v% triethanolamine-1 w/v% tetramethylammoniumchloride-methanol containing 0.05- 0.20 w/v% Ba) electrolyte. The potentiostatic extraction method using nonaqueous electrolytes with various Ba and H 2O contents was examined for the extraction of MgO inclusion particles from metals. The O content of the extracted MgO and MgAl 2O 4 inclusion particles agreed approximately with the analyzed total O content of the metal. The Mg contents of the extracted inclusion particles were in agreement with those calculated using the results of two-dimensional measurements. Finally, it was concluded that 2% TEA-Ba was the most suitable for the electrolytic extraction of MgO and MgAl 2O 4 inclusion particles from steel.

Original languageEnglish
Pages (from-to)2050-2055
Number of pages6
JournalISIJ International
Issue number12
Publication statusPublished - 2011


  • 2% TEA-Ba
  • Electrolytic extraction
  • MgAl2O4
  • MgO
  • Nonaqueous electrolyte
  • Nonmetallic inclusion


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