DESCRIPTION GRAIN-ORIENTED ELECTRICAL STEEL SHEET HAVING INSULATING FILM NOT CONTAINING CHROMIUM AND INSULATING FILM AGENT OF SAME TECHNICAL FIELD The present invention relates to insulating film formation technology for grain-oriented electrical steel sheet, more particularly provides a treatment solution not containing chromium and relates to a product using this and having superior insulating film properties of annealing resistance, film tension, insulation, adhesion, corrosion resistance, and the like and an insulating film formation method. BACKGROUND ART Grain-oriented electrical steel sheet is obtained by hot rolling a silicon steel slab containing Si at for example 2 to 4%, annealing it, then cold rolling it one time or two times or more with process annealing in between to obtain a final sheet thickness, then is made into a final product by decarburization annealing it, then applying an annealing separating agent mainly comprised of MgO, performing finishing annealing to cause secondary recrystallization having a Goss orientation, further removing S, N, and other impurities, forming a glass film, then applying an insulating film agent and baking and heat flattening the sheet. The grain-oriented electrical steel sheet obtained in this way is mainly used in electrical equipment, transformers, and the like as a core material and is required to have a high magnetic flux density and superior core loss. When grain-oriented electrical steel sheet is used as a transformer core, the grain-oriented electrical steel sheet coil is slit, is cut to predetermined lengths while being continuously unwound, and state of adhesion hours at 50°C and humidity 98% or (Table Removed) (*2) Insulating film baked on, then evaluated. (*3) Evaluation of rusting after 24 more in atmosphere As a result of these experiments, in the case of addition of Fe, Ni, Co, Sr, and Mo compounds of the present invention, compared with the case of no addition of additives, the hygroscopicity and annealing resistance of the film after baking were remarkably improved and film properties not different from Comparative Example 4 containing a conventional chromium compound could be obtained. In particular, a more superior effect of improvement could be obtained in addition of an Fe compound. However, when the amount of addition of ferric hydroxide is small, the effect is weak, while when it is excessive, the solution stability, corrosion resistance, film tension, etc. are inferior, i.e., the film characteristics are inferior. (Example 2) Samples were cut out from a final finished annealed high magnetic flux density grain-oriented electrical steel sheet coil of a sheet thickness of 0.23 mm in the same way as in Example 1, were rinsed with water, then were stress relief annealed at 850°Cx4 Hr. Next, the samples were lightly pickled in a 2% H2SO4 aqueous solution at 75°C for 15 seconds. The steel sheets were coated with treatment agents containing solutions changed in conditions of grain size of colloidal solutions of hydroxides of Fe and Ni as additives as shown in Table 3 by coating rolls to give a mass after drying and baking of 5 g/m2 and baked at 850°Cx30 seconds. After this, samples were cut out from the product sheets and examined for film properties. The results are shown in Table 4. Table 3 (Table Removed) (*4) Composite colloidal solution of SiO2 on surface of which ferric hydroxide is formed by mass ratio of 3:1 Figures in ( ) show grain size of composite Table 4 (Table Removed) As a result of these experiments, in the case of addition of a compound obtained by preparing an Fe and Ni hydroxide of the present invention as a colloidal solution, an extremely great effect of improvement of the corrosion resistance and annealing resistance could be obtained. Compared to the case of including a conventional chromium compound, more superior film performance and magnetic properties could be obtained. Further, even in the case of addition of a composite colloidal substance prepared from Si02 on the surface of which ferric hydroxide is provided as a composite substance as a colloidal substance, substantially the same effect was obtained as with addition of a single colloidal substance. As opposed to this, in the case of not adding an inorganic compound colloidal solution of Comparative Example 5 in the same way as Example 1, the result was extremely inferior corrosion resistance and annealing resistance. Further, in the case of adding a colloid with a large grain size of the colloidal substances as in the Invention Examples 12, 15, and 16, while an effect of improvement could be seen, it was not that large. (Example 3) The same experimental procedure as Example 2 was used to measure the annealing resistance when changing the amount of addition of the colloidal ferric hydroxide (10 Nm) solution with respect to 100 ml of the base solution of the primary Al phosphate; 25 ml + primary Mg phosphate; 25 ml + 20% colloidal silica (7 nm) by the molar ratio with respect to the phosphate from 0 to 2.5. The results are shown in FIG. 2. By adding 0.06 mol or more of ferric hydroxide per mole of phosphate, the peel force could be greatly reduced. INDUSTRIAL APPLICABILITY According to the present invention, by adding compounds of hydroxides, oxides, carbonates, silicates, and molybdates of Fe, Ni, Co, Cu, Sr, Mo, and the like in a phosphate-based tensile film not containing a chromium compound, the corrosion resistance of the film after baking is improved and a remarkable effect of improvement of seizure resistance during stress relief annealing can be obtained. In particular, an extremely superior effect is exhibited in the addition of a superfine grain colloidal substance of Fe. CLAIMS 1. Grain-oriented electrical steel sheet having an insulating film not containing chromium characterized in that the insulating film contains a phosphate and one or more inorganic compounds selected from inorganic compounds of Fe, Ni, Co, Cu, Sr, and Mo in an amount, as metal elements, of 0.06 to 2.10 mole per mole of that phosphate (based on metal ions). 2. Grain-oriented electrical steel sheet having an insulating film not containing chromium as set forth in claim 1 characterized in that said inorganic compound of Fe, Ni, Co, Cu, Sr, and Mo is one or more of a hydroxide, oxide, carbonate, silicate, and molybdate. 3. Grain-oriented electrical steel sheet having an insulating film not containing chromium as set forth in claim 1 or 2 characterized by further containing 35 to 100 parts by mass of Si02 with respect to 100 parts by mass of phosphate. 4. An insulating film agent for grain-oriented electrical steel sheet not containing chromium characterized by containing one or more inorganic compounds selected from inorganic compounds of Fe, Ni, Co, Cu, Sr, and Mo in an amount, as metal elements, of 0.06 to 2.10 mole per mole (based on metal ions) of a total of one or more types of primary phosphates selected from Al, Mg, Ca, Ni, and Co. 5. An insulating film agent for grain-oriented electrical steel sheet not containing chromium as set forth in claim 4 characterized by further containing colloidal silica in an amount, as solid content equivalent, of 35 to 100 parts by mass with respect to 100 parts by mass of said phosphate. 6. An insulating film agent for grain-oriented electrical steel sheet having an insulating film not containing chromium as set forth in claim 4 or 5 characterized in that said inorganic compound of Fe, Ni, Co, Cu, Sr, and Mo is one or more of a hydroxide, oxide, carbonate, silicate, or molybdate. 7. An insulating film agent for grain-oriented electrical steel sheet not containing chromium as set forth in claim 6 characterized in that said hydroxide, oxide, carbonate, silicate, or molybdate compound of Fe, Ni, Co, Cu, Sr, and Mo is a colloidal substance stable as an aqueous solution. 8. An insulating film agent for grain-oriented electrical steel sheet not containing chromium as set forth in claim 7 characterized in that the colloidal substance has the form of a single compound colloid, a composite colloid with SiO2 or Al2O3 or the like, or a mixture of the same. 9. An insulating film agent for a grain-oriented electrical stee.l sheet not containing chromium as set forth in claim 7 or 8 characterized in that the colloidal substance has a grain size of 500 nm or less. 10. Grain-oriented electrical steel sheet having an insulating film not containing chromium, substantially as herein described with reference to the foregoing examples and accompanying drawings.