METAL FILM COATED HAVING EXCELLENT OXIDATION RESISTANCE AT HIGH TEMPERATURE AND CORROSION RESISTANCE AND THE STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME

摘要

The present invention relates to a metal coating film having excellent high-temperature oxidation resistance and corrosion resistance, and a method of manufacturing the same, and more particularly, by improving the conventional physical vapor deposition method to form the structure of the metal coating film from a columnar crystal structure to a partially isotropic structure, The present invention relates to a method of manufacturing a metal coating film capable of inhibiting oxide formation by trapping oxygen ions while reducing a diffusion rate by increasing a diffusion path between the base materials on the surface of the coating film, and to a metal coating film manufactured thereby. According to the present invention, by changing the structure of the coating layer made of an ultra-high temperature oxidation-resistant material from a columnar crystal structure to an isotropic structure, oxygen ion penetration into the coating film during high temperature oxidation is suppressed, thereby increasing safety during normal operation as well as accident safety. It works. In addition, since the deposition rate is faster than the process of reducing the grain size by applying a high negative bias voltage (NBV), the manufacturing cost may be reduced.