Patent ID: 8715837
Filing Date: 2014-05-06
Classification: C09D,C23C,H04N,H05K,Y10T

Abstract:
1. A black-coated steel sheet comprising: zinc based plating layers disposed on both surfaces of a steel sheet; a chromium-free chemical conversion coating disposed on the zinc based plating layer on at least one surface of the steel sheet; and a colored single organic coating which is disposed on at least one of the chemical conversion coating and which comprises a polyester resin having a hydroxyl value of 10 KOHmg/g or more, an imino-containing melamine resin, and 5 to 15 percent by mass of carbon black, wherein the glass transition temperature (Tg) of the colored single organic coating is 40° C. or higher, the film thickness is 10 μm or less, and the hardness is 200 N/mm