COATED CAST IRON SUBSTRATE Russian patent published in 2025 - IPC C23C24/08 C23C26/00 C23C2/04 C23C2/36 B82Y30/00 

FIELD: chemistry.

SUBSTANCE: disclosed is a group of inventions comprising a cast iron substrate with a corrosion-resistant coating, a method of making said substrate, a method of applying a coating on a steel strip by hot dipping into molten metal using equipment, at least part of which is made from said cast iron substrate, and installation for coating said steel strip. Anti-corrosion coating of the cast iron substrate contains graphite nanoplates and a sodium silicate binder. Cast iron substrate has a composition, in weight percent, including 2.0–6.67% of C and optionally including one or more of the following elements: Mn ≤ 3, Si ≤ 5, Mo ≤ 2, Cu ≤ 2.5, Ni ≤ 2, Cr ≤ 3, V ≤ 0.5, Zr ≤ 0.3, Bi ≤ 0.01, Mg ≤ 0.1, Ce ≤ 0.04, the rest of the composition consists of iron and unavoidable impurities arising from treatment. Concentration of graphite nanoplates in coating is 5–70 wt.%, and concentration of sodium silicate in coating is 35–75 wt.%.

EFFECT: providing a cast-iron substrate, well protected from corrosion in molten metal.

14 cl, 1 dwg, 1 tbl, 2 ex