SURFACE TREATED STEEL SHEET SUPERIOR IN ELECTROMAGNETIC WAVE SHIELDING PROPERTY AND CORROSION RESISTANCE, AND MANUFACTURING METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a surface-treated steel sheet superior in electromagnetic wave shield properties without lowering corrosion resistance, and to provide a manufacturing method therefor.;SOLUTION: The surface-treated steel sheet superior in the electromagnetic wave shield properties and corrosion resistance has an organic and/or inorganic coating containing no chromium formed on the surface of a galvanized steel sheet or an aluminized steel sheet, wherein x (μm) and y (μm) respectively defined by an arithmetic mean roughness Ra of the surface after the coating is formed and the average film thickness, satisfy the expression (1): y ≤ 0.64x+0.12 (1).;COPYRIGHT: (C)2004,JPO