Conclusions
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1.
The transfer of oxides of iron, chromium, and other metals into silicates is due to the presence of “holes” in the lattice of [SiO4]4− and also to the formation of low-melting compounds of the fayalite type.
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2.
The pickling time for removal of mill scale from steel Kh18N10T with a thickness of 0.8 mm is 5–7 sec.
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3.
The silicate bath retains its activity if the concentration of iron oxides does not exceed 12–15%. The total permissible concentration of iron and chromium oxides is 25%.
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Literature cited
N. P. Zhetvin, Removal of Scale from the Surface of Metals [in Russian], Metallurgizdat, Moscow (1964).
V. V. Stychinskii and S. D. Beshelev, Prevention of Scale Formation and Methods of Cleaning Parts [in Russian], Metallurgizdat, Moscow (1964).
D. A. Klyachko et al., Some Problems in Etching Stainless Steels [in Russian], Moskov, Vecher. Metallurg. Inst. (1957).
N. P. Zhetvin, Stal', No. 5 (1957).
V. D. Isupov, Stal', No. 6 (1959).
Additional information
Siberian Metallurgical Institute. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov 16, pp. 14–17, December, 1971.
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Tarasko, D.I., Makhalova, N.P. The removal of scale from metals and alloys in molten silicates. Met Sci Heat Treat 13, 1008–1010 (1971). https://doi.org/10.1007/BF00664993
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DOI: https://doi.org/10.1007/BF00664993