公开(公告)号：EP2940187A4

公开(公告)日：2016-01-27

申请号：EP12890712

申请日：2012-12-28

申请人： POSCO

发明人： KWAK YOUNG-JIN ,  NAM KYUNG-HOON ,  JUNG YONG-HWA ,  KIM TAE-YEOB ,  LEE DONG-YOEUL ,  CHO SEOK-WON ,  LEE YOUNG-RA ,  EOM MUN-JONG ,  JUNG WOO-SUNG ,  HONG SEOK-JUN ,  MIN JAE-KYU ,  SOHN HONG-KYUN

IPC分类号： C23C22/07 ,  C23C22/40 ,  C23C28/00

CPC分类号： C23C18/1637 ,  C23C18/31 ,  C23C18/48 ,  C23C22/42 ,  C23C28/321 ,  C23C28/3225 ,  C23C28/34 ,  Y10T428/12667 ,  Y10T428/12799

摘要： The present invention relates to a phosphate solution for a zinc- or zinc-based alloy-plated steel sheet, and a zinc- or zinc-based alloy-plated steel sheet using the same. One embodiment of the present invention provides a phosphate solution for a zinc- or zinc-based alloy-plated steel sheet which contains a Mo ion, a Ca ion and a phosphate ion. Another embodiment of the present invention provides a zinc- or zinc-based alloy-plated steel sheet comprising: a base steel sheet; a zinc-based or zinc alloy-based plating layer formed on the base steel sheet; and a phosphate film formed on the plating layer, wherein the phosphate film comprises a molybdenum compound, Ca and a phosphate. According to the present invention, it is possible to provide: a phosphate solution capable of preventing pitting generated when a steel sheet is treated with a phosphate and providing excellent corrosion resistance to a phosphate film; and a zinc- or zinc-based alloy-plated steel sheet using the same.