公开(公告)号：US20210156017A1

公开(公告)日：2021-05-27

申请号：US17044238

申请日：2019-04-26

申请人： NIPPON STEEL CORPORATION

发明人： Masahiro FUDA ,  Toshinori MIZUGUCHI ,  Junji NAKANO ,  Yoshiharu INOUE ,  Kazuhisa KUSUMI ,  Yasuaki NAITO

IPC分类号： C23C2/08 ,  C25F1/06 ,  C22C13/00 ,  C22C38/06 ,  C22C38/02 ,  C22C38/04 ,  C22C38/00 ,  C22C38/42 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C23C2/02 ,  C23C28/02

摘要： A hot-dip Sn—Zn-based alloy-plated steel sheet according to an aspect of the present invention includes: a steel sheet having a predetermined chemical composition; a diffusion alloy layer provided on one surface or both surfaces of the steel sheet; and a Sn—Zn-plated layer provided on the diffusion alloy layer, in which the diffusion alloy layer contains Fe, Sn, Zn, Cr, and Ni, an area ratio of a Sn—Fe—Cr—Zn phase to a Sn—Fe—Ni—Zn phase in the diffusion alloy layer is 0.01 or more and less than 2.5, the diffusion alloy layer has a coverage of 98% or more with respect to the one surface, the Sn—Zn-plated layer contains 1% to 20% of Zn by mass % and a remainder consisting of Sn and impurities, and an adhesion amount of the Sn—Zn-plated layer is 10 to 80 g/m2 per one surface.