The present invention relates to an aqueous composition for coating grain-oriented steel, comprising - aluminum cations, - manganese cations, - dihydrogen phosphate, hydrogen phosphate and/or phosphate anions, - colloidal silicon dioxide and - optionally iron cations, wherein the aluminum cations present in the composition, calculated as Al2O3, the manganese cations, calculated as MnO, the dihydrogen phosphate, hydrogen phosphate and/or phosphate anions, calculated as P2O5, colloidal silicon dioxide, calculated as SiO2, and optionally the iron cations, calculated as FeO, result in the molecular formula (Al2O3)2(MnO)1,8-2,4(FeO)0-0,2(P2O5)5-7(SiO2)≥30.
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机译：本发明涉及用于涂覆方向性钢的水性组合物，其包含-铝阳离子，-锰阳离子，-磷酸二氢，磷酸氢根和/或磷酸根阴离子，-胶态二氧化硅和-任选地铁阳离子，其中铝阳离子存在于组合物中的元素，以Al 2 O 3 表示，锰阳离子以MnO表示，磷酸二氢根，磷酸氢根和/或磷酸根阴离子，以P < Sub> 2 O 5 ，胶体二氧化硅，计算为SiO 2 ，以及可选地铁离子，计算为FeO，生成分子式（Al 2 O 3 ） 2 （MnO） 1,8-2,4 （FeO） 0 -0,2 （P 2 O 5 ） 5-7 （SiO 2 ）< Sub>≥30。
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