Title:
PHOSPHATE SOLUTION FOR ZINC- OR ZINC-BASED ALLOY-PLATED STEEL SHEET, AND ZINC OR ZINC-BASED ALLOY-PLATED STEEL SHEET USING SAME
Document Type and Number:
WIPO Patent Application WO/2014/104442
Kind Code:
A1
Abstract:
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.
Inventors:
KWAK YOUNG-JIN (KR)
NAM KYUNG-HOON (KR)
JUNG YONG-HWA (KR)
KIM TAE-YEOB (KR)
LEE DONG-YOEUL (KR)
CHO SEOK-WON (KR)
LEE YOUNG-RA (KR)
EOM MUN-JONG (KR)
JUNG WOO-SUNG (KR)
HONG SEOK-JUN (KR)
MIN JAE-KYU (KR)
SOHN HONG-KYUN (KR)
NAM KYUNG-HOON (KR)
JUNG YONG-HWA (KR)
KIM TAE-YEOB (KR)
LEE DONG-YOEUL (KR)
CHO SEOK-WON (KR)
LEE YOUNG-RA (KR)
EOM MUN-JONG (KR)
JUNG WOO-SUNG (KR)
HONG SEOK-JUN (KR)
MIN JAE-KYU (KR)
SOHN HONG-KYUN (KR)
Application Number:
PCT/KR2012/011746
Publication Date:
July 03, 2014
Filing Date:
December 28, 2012
Export Citation:
Assignee:
POSCO (KR)
International Classes:
C23C22/07; C23C22/40; C23C28/00
Domestic Patent References:
| WO2002046494A1 | 2002-06-13 |
Foreign References:
| KR940001032B1 | 1994-02-08 | |||
| JP2005126812A | 2005-05-19 | |||
| KR20110060352A | 2011-06-08 | |||
| JP2624272B2 | 1997-06-25 | |||
| US4961764A | 1990-10-09 |
Other References:
See also references of EP 2940187A4
Attorney, Agent or Firm:
C & S PATENT AND LAW OFFICE (Daelim Acrotel13 Eonju-ro 30-gil,Gangnam-gu, Seoul 135-971, KR)
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