| abstract |
(57) [Summary] [Purpose] To provide a coated steel sheet with good corrosion resistance even in a harsh environment such as in a tunnel. [Structure] The lowermost layer has a flexible coating, and one or more layers of hard oligo (meth) acrylate are coated on it, and the oligo (meth) acrylate layer is cured with an electron beam, and further heated to give a flexible coating. Painted stainless steel metal plate obtained by curing (polyester, acrylic). [Effect] By forming the lowermost layer of a flexible coating film, chipping in the tunnel, cracking of the coating film due to vibration and temperature difference can be prevented, and as a result, corrosion resistance is improved. |