Patent ID: 6677058
Filing Date: 2004-01-13
Classification: B32B,C22C,C23C,Y10S,Y10T

Abstract:
A method of producing a hot-dip Zn plated steel sheet excellent in luster-retaining property comprising:a step of continuously immersing and withdrawing steel strip into/from a hot-dip Zn base bath containing Al: 4.0-15 mass % and Mg: 1.0-4.0 mass %, thereby forming a plating layer thereon; and a step of thereafter continuously passing the steel strip through a water quenching zone that effects cooling while bringing the completely solidified plating layer surface into contact with a water stream, wherein degradation of the plating layer luster being inhibited at this time by controlling strip temperature on the water quenching zone entry side to lower than 105Â° C.