| 摘要 |
<p>PURPOSE:To form a dense vitreous thermal sprayed film excellent in adhesive strength on the surface of a metal, by subjecting a metallic base material preheated to a specific temp. to flame spraying with a powdered vitreous material of a specific softening point. CONSTITUTION:A metallic base material is preheated to 300-800 deg.C, and flame spraying with powdered vitreous material of <=1,000 deg.C softening point (borosilicate glass, lead glass, phosphate glass, etc.) is applied to the above base material to form a thermally sprayed film of about 20-1,000mu thickness. Further,m it is preferable to apply, prior to preheating, blasting treatment to the metallic base material to carry out surface roughing, and the temp. of the flame to be sprayed is regulated to <=about 2,000 deg.C. By this method, the dense vitreous thermally sprayed film can be formed on the metal surface, and the oxidation resistance, acid resistance, electric insulating property, and attractive appearance of the metal can be improved.</p> |
