AQUEOUS COMPOSITION FOR COVERING ANISOTROPIC STEEL Russian patent published in 2022 - IPC C23C22/18 C23C22/20 C23C22/74 H01F1/147 H01F1/18 

FIELD: chemistry.

SUBSTANCE: group of inventions relates to an aqueous composition for application of coating to anisotropic steel, a method for application of coating to anisotropic steel, and anisotropic steel containing coating obtained by application of the mentioned composition. The aqueous composition contains aluminum cations, manganese cations, dihydrophosphate-, hydrophosphate-, and/or phosphate-anions, colloid silicon dioxide, and optional iron cations. At the same time, aluminum cations recalculated to Al₂O₃, manganese cations recalculated to MnO, dihydrophosphate-, hydrophosphate-, and/or phosphate-anions recalculated to P₂O₅, colloid silicon dioxide recalculated to SiO₂, and optional iron cations recalculated to FeO, contained in the composition, give the chemical formula (Al₂O₃)₂(MnO)_1,8-2,4(FeO)_0-0,2(P₂O₅)_5-7(SiO₂)_≥30.

EFFECT: long-term protection from corrosion and electrical insulation of a surface of anisotropic steel, when using an aqueous composition stable during storage without environmentally harmful metals.

17 cl, 3 tbl, 3 ex