BLACKENED STEEL STHEET WITH HIGH ADHESION PROPERTY OF BLACKENED LAYER AND METHOD FOR MANUFACTURING THE SAME

摘要

invention youngsangga dedicated electronics, home appliances, audio devices, OA devices and applications where steel and black as it relates to a method, and particularly, to a metal ion and excellent adhesion to a black steel sheet which is blackened layer forming an inorganic film on the steel sheet surface by using a black reducing treatment to an organic acid with the basic solution and a method of manufacturing the same. The invention comprises a blackened layer on the surface of the steel sheet, and the blackening layer is the atomic composition ratio Zn: Ni: Sn: O = 1: 0.015 ~ 0.06: 0.01 ~ 0.065: blackening layer is excellent in adhesion to the black made in a proportion of 0.1 to 0.5 provides a steel sheet and a manufacturing method. According to the invention, the adhesion of the blackening layer is improved, and excellent surface appearance, it is possible to manufacture the black plate with a competitive price rapidly, to the prevention of pollution by powdering roll steel sheet in the production process Therefore, it is possible to improve the continuous operability. ;