公开(公告)号：US20230416937A1

公开(公告)日：2023-12-28

申请号：US18463036

申请日：2023-09-07

Applicant: POSCO CO., LTD

Inventor： Moon-Jae KWON ,  Jae-Yeong LEE ,  Su-Young KIM

IPC: C25D3/56 ,  B21B1/22 ,  B23H1/04 ,  B23H5/04 ,  B32B15/01 ,  C25D5/36 ,  C25D5/52

CPC classification number: C25D3/565 ,  B21B1/22 ,  B23H1/04 ,  B23H5/04 ,  B32B15/013 ,  C25D5/36 ,  C25D5/52

Abstract: Provided is a method of manufacturing a zinc-nickel alloy electroplated steel sheet. The method includes operations of: temper rolling a base steel sheet; immersing the temper-rolled base steel sheet in a sulfuric acid bath including nickel sulfate hydrate and zinc sulfate hydrate to form a zinc-nickel plating layer on the base steel sheet; and polishing the zinc-nickel plating layer and processing a hairline pattern.