Application of Different Extraction Methods for Investigation of Nonmetallic Inclusions and Clusters in Steels and Alloys

Table 1

Comparison of main parameters of different extraction methods for investigation of nonmetallic inclusions in metal sample.

Dissolution parameters	Reference	Extraction method
		Acid	Halogen-alcohols		Electrolytic extraction
			5% Bromine-methanol	14% Iodine-methanol	10% AA	4% MS	2% TEA
Dissolution ratio of Al2O3 (%)
(i) Particles < 0.1 µm	[5]	4.0–6.7	0.4-0.5	0.10–0.13	0.006-0.007	—	—
(ii) Particles ~1 µm	[5]		0.021	0.016	<0.003	—	—
Dissolution rate (g/min)	ps		0.006–0.015	0.002–0.006	0.0004–0.001	0.0004–0.001	0.0004–0.0007
Depth dissolution rate (µm/min)	ps		2.07–5.17	0.69–2.07	0.14–0.35	0.14–0.35	0.14–0.24

ps: present study.