公开(公告)号：EP3231896B9

公开(公告)日：2020-08-12

申请号：EP16746571.5

申请日：2016-02-01

申请人： Nippon Steel Corporation

发明人： ISHIZUKA, Kiyokazu ,  MAEKAWA, Noriyuki ,  URAMOTO, Hiroaki ,  FUDA, Masahiro ,  YAMAOKA,Ikuro ,  MATSUMURA, Kenichiro

IPC分类号： C23C8/00 ,  C23C22/36 ,  C23C22/60 ,  C23C22/78 ,  B32B15/04 ,  B32B15/18 ,  B32B15/01 ,  B65D85/84 ,  C25D5/26 ,  C25D5/48 ,  C25D3/56 ,  C25D7/00 ,  C23C28/00 ,  C23C22/42 ,  B60K15/03 ,  B32B1/02 ,  C23C28/02

公开(公告)号：EP3231896B1

公开(公告)日：2020-04-01

申请号：EP16746571.5

申请日：2016-02-01

申请人： Nippon Steel Corporation

发明人： ISHIZUKA, Kiyokazu ,  MAEKAWA, Noriyuki ,  URAMOTO, Hiroaki ,  FUDA, Masahiro ,  YAMAOKA,Ikuro ,  MATSUMURA, Kenichiro

IPC分类号： C23C8/00 ,  C23C22/36 ,  C23C22/60 ,  C23C22/78 ,  B32B15/04 ,  B32B15/18 ,  B32B15/01 ,  B65D85/84 ,  C25D5/26 ,  C25D5/48 ,  C25D3/56 ,  C25D7/00 ,  C23C28/00 ,  C23C22/42 ,  B60K15/03 ,  B32B1/02 ,  C23C28/02

摘要： A steel sheet for a fuel tank includes: a Zn-Ni alloy plated layer which is placed on one surface or each of both surfaces of a base metal and formed on at least one surface; and an inorganic chromate-free chemical conversion coating film which is placed over the Zn-Ni alloy plated layer. The Zn-Ni alloy plated layer has a crack starting from an interface between the Zn-Ni alloy plated layer and the inorganic chromate-free chemical conversion coating film and reaching an interface between the Zn-Ni alloy plated layer and the steel sheet, and a water contact angle on a surface of the inorganic chromate-free chemical conversion coating film is more than or equal to 50 degrees.