TREATMENT LIQUID FOR CHROMIUM-LESS TENSILE FILM, METHOD FOR FORMING CHROMIUM-LESS TENSILE FILM, AND CHROMIUM-LESS TENSILE FILM-COATED GRAIN ORIENTED ELECTROMAGNETIC STEEL SHEET

摘要

PROBLEM TO BE SOLVED: To provide a treatment liquid capable of obtaining a chromium-less tensile film simultaneously having excellent moisture absorption resistance and core loss reduction effect by sufficient tension application, to provide a method for forming the film, and to provide a grain-oriented electromagnetic steel sheet coated with the film.;SOLUTION: Colloidal silica by 20 pts.mass expressed in terms of a solid content is blended with one or more kinds selected from the phosphates of Mg, Al, Ca, Fe and Mn by 10 to 80 pts.mass, the chloride of Mg, Al, Fe, Bi, Co, Mn, Zn, Ca, Ba, Sr or Ni by 3 to 30 pts.mass and one or more kinds selected from borates and sulfates of Li, Na, K, Mg, Mn, Ca, Ba, Sr, Sn, Fe, Co, Ni, Cu, Zn, Al and Bi by 1 to 10 pts.mass.;COPYRIGHT: (C)2009,JPO&INPIT