ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Regular Article
Extraction of Nonmetallic Inclusion Particles Containing MgO from Steel
Ryo InoueShigeru UedaTatsuro AriyamaHideaki Suito
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2011 Volume 51 Issue 12 Pages 2050-2055

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Abstract

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 MgAl2O4 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 H2O contents was examined for the extraction of MgO inclusion particles from metals. The O content of the extracted MgO and MgAl2O4 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 MgAl2O4 inclusion particles from steel.

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© 2011 by The Iron and Steel Institute of Japan
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