Insulating Coating Film Treatment Liquid For Grain Oriented Electromagnetic Steel Sheet And Method For Producing Grain Oriented Electromagnetic Steel Sheet

Abstract: This method for producing an insulating coating film treatment liquid for a grain-oriented electromagnetic steel sheet includes: an adjustment step of adding a K compound to colloidal silica, and adjusting a K2O/SiO2 ratio in mass% between the K amount in terms of K2O in the colloidal silica and the Si amount in terms of SiO2 to 0.5% to 10%; and a mixing step of mixing the colloidal silica in which the K2O/SiO2 ratio has been adjusted, without adding a chromic acid salt, and a metal phosphate salt(s) of one or more metals selected from Al, Fe, Mg, Mn, Ni, Zn, Co, Mo, V, W, and Zr.

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