| abstract |
(57) [Problem] To provide a non-demolding type lubricated plated steel sheet which is excellent in coating film adhesion and corrosion resistance of a processed portion, is chromium-free, and has a small environmental load and can be omitted from press oil. SOLUTION: As a lower layer on the surface of a steel sheet, Zn-Mg- An Al-based alloy plating layer or a Zn-Mg-Al-Si-based alloy plating layer is formed, and 100 parts by mass of an aqueous resin as a solid content, tannin or tannic acid 0.2 to 50 is formed thereon. A total of (a + b) the ether-ester type urethane resin (a) and the epoxy resin (b) having a bisphenol type skeleton, an ester skeleton and a carboxyl group on a coating layer containing a mass part as a base treatment layer; Apply and bake an aqueous lubricating paint containing 50 to 85% by mass based on the total solid content, 3 to 30% by mass of polyolefin wax (c), and 10 to 40% by mass of silica (d) having a particle size of 3 to 30 nm. A non-delamination type lubricated plated steel sheet having excellent corrosion resistance of a processed portion and low environmental load, characterized in that a coating having a thickness of 0.2 to 5 μm obtained by coating is provided. |