PROTECTION OF PURE IRON AGAINST HIGH-TEMPERATURE OXIDATION USING METABORATE AND METASILICATE COATINGS


HUSAIN Z.

CORROSION, vol.49, no.4, pp.290-293, 1993 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 49 Issue: 4
  • Publication Date: 1993
  • Doi Number: 10.5006/1.3316051
  • Title of Journal : CORROSION
  • Page Numbers: pp.290-293

Abstract

Sodium metaborate and metasilicate coatings protect pure iron in the temperature range 800 to 1,000-degrees-C. Metaborate and metasilicate inhibit oxidation. Protective vonsenite (4FeO x Fe2O3 x B2O3) forms with metaborate, and protective fayalite (2FeO x SiO2) forms with metasilicate. It is proposed that noncoherent blocking layers of these compounds effectively decrease the interface area for iron ion diffusion.