公开(公告)号：EP1540027B1

公开(公告)日：2008-05-14

申请号：EP03795199.3

申请日：2003-06-20

申请人： Nippon Steel Corporation

发明人： SUGIYAMA, Seiji, C/O NIPPON STEEL CORPORATION ,  IZAKI, Teruaki, C/O NIPPON STEEL CORPORATION ,  KUROSAKI, Masao, C/O NIPPON STEEL CORPORATION ,  GOTO, Yasuto, C/O NIPPON STEEL CORPORATION ,  OYAMA, Yusho, C/O NIPPON STEEL CORPORATION ,  KAMIYAMA, Tomohide, C/O NIPPON STEEL CORPORATION

IPC分类号： C23C2/26 ,  C23C2/08

CPC分类号： B32B15/013 ,  C22C13/00 ,  C23C2/02 ,  C23C2/08 ,  C23C28/021 ,  C23C28/023 ,  C23C28/028 ,  Y10S428/939 ,  Y10T428/12722 ,  Y10T428/12937

摘要： A Sn-based metal-coated steel strip excellent in appearance comprises a Ni-based metal (such as Ni, a Ni-Sn alloy, a Ni-Zn alloy, a Ni-Fe alloy and a Ni-Co alloy) preplating layer and a Sn-based metal (such as a Sn-Zn alloy) coating formed thereon, and is characterized in that a Ni emission intensity line and an Fe emission intensity line obtained by glow discharge spectroscopy of the surface of the coated steel strip satisfy a relationship of the formula: T1 >= T2wherein T1 is a sputtering time at the peak of a Ni emission intensity line, and T2 is a sputtering time at the inflection point of an Fe emission intensity line, or a relationship of the formulas: T1 >= T2, and 1