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Title:
PROCESS FOR PRODUCING TIN-PLATED STEEL PLATE, AND TIN-PLATED STEEL PLATE
Document Type and Number:
WIPO Patent Application WO/2010/002038
Kind Code:
A1
Abstract:
Disclosed is a process for producing a tin-plated steel plate, characterized by comprising forming an Sn-containing plating layer on at least one side of a steel plate so that the coverage of Sn is 0.05 to 20 g/m2 per side, immersing the plated steel plate in a chemical conversion treatment liquid containing more than 18 g/L and not more than 200 g/L of alminum primary phosphate and having a pH value of 1.5 to 2.4, or subjecting the plated steel plate to cathodic electrolyzing treatment in the chemical conversion treatment liquid at a current density of not more than 10 A/dm2, then washing the treated plated steel plate with water, and drying the washed treated plated steel plate to form a chemically converted film, and forming a product, of a reaction with a silane coupling agent, at a coverage of 0.10 to 100 mg/m2 per side in terms of Si.  According to this process, a tin-plated steel plate can be obtained that, without use of Cr, can suppress a deterioration in appearance and a lowering in coating material adhesion caused by the oxidation of the surface of the tin plating and, at the same time, can realize chemical conversion treatment at low cost.

Inventors:
SUZUKI TAKESHI (JP)
NAKAMURA NORIHIKO (JP)
IWASA HIROKI (JP)
Application Number:
PCT/JP2009/062492
Publication Date:
January 07, 2010
Filing Date:
July 02, 2009
Export Citation:
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Assignee:
JFE STEEL CORP (JP)
SUZUKI TAKESHI (JP)
NAKAMURA NORIHIKO (JP)
IWASA HIROKI (JP)
International Classes:
C23C28/00; C23C22/20; C25D11/36
Foreign References:
JP2007239004A2007-09-20
JPH05163584A1993-06-29
JPS5035042A1975-04-03
JPS5524516B21980-06-30
JPS5841352B21983-09-12
JPS4928539A1974-03-14
JP2005029808A2005-02-03
JP2007239091A2007-09-20
Other References:
See also references of EP 2309029A4
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JFE Techno-Research Corporation 7th Floor, Yanagiya Building, 1-10, Nihonbashi 2-chome, Chuo-k, Tokyo 27, JP)
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