Title:
CHEMICAL TREATMENT LIQUID AND CHEMICALLY TREATED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2019/187944
Kind Code:
A1
Abstract:
The present invention: makes it possible to form a chemical treatment coating that has high adhesion to Zn-plated steel sheets; and suppresses the occurrence of cracks in the chemical treatment coating when the chemical treatment coating is dried at a high temperature. The chemical treatment liquid according to one embodiment of the present invention is for forming a chemical treatment coating on the surface of a zinc-plated steel sheet that has a zinc plating layer that includes 0.1–22.0 mass% of Al. The chemical treatment liquid includes a water-soluble group 4 metal oxoate, a phosphate compound, a group 1 metal, a molybdate, and a vanadium salt, the molar ratio of phosphorous to group 4 metal being 0.5–4, the molar ratio of group 1 metal to group 4 metal being 0.02–0.8, and the molar ratio of group 1 metal to phosphorous being at least 0.01.
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Inventors:
NISHIDA YOSHIKATSU (JP)
MATSUNO MASANORI (JP)
YAMAKI NOBUHIKO (JP)
UENO SHIN (JP)
MATSUNO MASANORI (JP)
YAMAKI NOBUHIKO (JP)
UENO SHIN (JP)
Application Number:
PCT/JP2019/007700
Publication Date:
October 03, 2019
Filing Date:
February 27, 2019
Export Citation:
Assignee:
NISSHIN STEEL CO LTD (JP)
International Classes:
C23C22/42; B32B15/04; C22C18/04; C23C2/06; C23C28/00
Foreign References:
| JP2014208874A | 2014-11-06 | |||
| JP2016089232A | 2016-05-23 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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