On the nature of the effect of non-metallic inclusions on the tendency of steel to local corrosion

• Published in: Metallurgist (New York) Vol. 67; no. 11-12; pp. 1810 - 1818
• Main Authors: Gudov, A. G., Burmasov, S. P., Zhitlukhin, E. G., Parkhomenko, I. P., Dresvyankina, L. E.
• Format: Journal Article
• Language: English
• Published: New York Springer US 2024; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Composition effects; Corrosion effects; Corrosion mechanisms; Corrosion products; Materials Science; Medium carbon steels; Metallic Materials; Nonmetallic inclusions; Stoichiometry; Corrosive non-metallic inclusions; Volta potential; Non-stoichiometric composition; Oxidation potential; Electrochemical heterogeneity; 620.196:669.18
• ISSN: 0026-0894; 1573-8892
• DOI: 10.1007/s11015-024-01678-6

The compositions of non-metallic phases in samples of medium-carbon steel, which differed in production technology and level of contamination with corrosive non-metallic inclusions, have been studied in detail by scanning electron microscopy. It is shown that the effect of non-metallic inclusions on the tendency of steel to local corrosion can be related to the degree of non-stoichiometry of their composition. A mechanism for the formation of non-stoichiometric inclusions during steel production using a modern technological scheme is proposed.