COATING AGENT FOR FORMING COATING OF ANISOTROPIC ELECTRIC STEEL SHEET AND METHOD FOR PRODUCING ANISOTROPIC ELECTRIC STEEL SHEET Russian patent published in 2022 - IPC C23C22/50 C23C22/46 H01F1/147 

FIELD: anisotropic electrical steel sheet production.

SUBSTANCE: inventions group relates to a coating agent for forming a coating of an anisotropic electrical steel sheet and a method for producing an anisotropic electrical steel sheet. The coating agent contains an aluminum source containing alumina and/or an alumina precursor compound, a boron source containing an alkali metal borate, and silicon oxide and/or a silicon oxide precursor in an amount converted to silicon oxide of 5 wt.% or more, and 10 wt.% or less relative to the total mass of solids of the source of aluminum and source of boron. The content of the source of aluminum and the source of boron in the coating agent provides an Al/B molar ratio of 0.5-2.0. The total solids concentration of the aluminum source and the boron source in the coating agent is 20 mass% or more and 38 mass% or less, and the pH is 2.0 or more and 6.0 or less.

EFFECT: ensuring the formation of an aluminum borate coating with high adhesion and high tension, as well as preventing the gelation of the coating agent.

5 cl, 2 tbl, 2 ex