Zn-Co PLATED METALLIC SHEET EXCELLENT IN CORROSION RESISTANCE AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To produce a Zn-Co electroplated metallic sheet excellent in corrosion resistance even with small plating coating weight and moreover excellent also as to forming workability and productivity. ;SOLUTION: In this Zn-Co plated metallic sheet in which a plating layer essentially consisting of a Zn-Co alloy is formed, the Zn-Co plating layer is made amorphous. Moreover, it can be said that it is amorphous in the case the X-ray diffraction pattern of the plating layer measured by using Cu-Kα rays does not substantially include the peaks caused by a η phase of Zn, and peaks substantially resulted from substrate metal excepting the fact that the peaks of ≥1° half-value width are shown in the vicinity of 2 θ: 41 to 45°.;COPYRIGHT: (C)2001,JPO