Title:
CHROMIUM-FREE SURFACE-TREATED TINPLATE, PRODUCTION METHOD AND SURFACE TREATING AGENT THEREFOR
Document Type and Number:
WIPO Patent Application WO/2017/092648
Kind Code:
A1
Abstract:
Provided are a chromium-free surface-treated tinplate, a production method and a surface treating agent therefor. By coating, on the surface of a tinplate, an environmentally friendly aqueous surface treating agent containing 0.1-5 wt% of a zinc salt, 0.1-5 wt% of a zirconium salt and/or a molybdenum salt and 5-30 wt% of siloxane or polysiloxane, a layer of chromium-free passivation film having uniform and dense ingredients and a good performance and being stable is formed on the surface of a tin layer. The passivation film contains 0.1-20 mg/m2 of zinc, 0.1-20 mg/m2 of zirconium and/or molybdenum and 0.5-100 mg/m2 of silicon. The passivation film can impart an excellent surface stability, corrosion resistance and paint film adhesion performance to the surface of the tinplate; in addition, contact with food is safe. The tinplate is comparable to chromium passivation in performance and the production process thereof does not use a chromate, so that a truly green production process of a tinplate is achieved, complying with the requirements of increasingly strict environmental protection laws and regulations.
Inventors:
LI PENG (CN)
YAN RENYUN (CN)
WEI JUNSHENG (CN)
LI BINGHU (CN)
YAN RENYUN (CN)
WEI JUNSHENG (CN)
LI BINGHU (CN)
Application Number:
PCT/CN2016/107673
Publication Date:
June 08, 2017
Filing Date:
November 29, 2016
Export Citation:
Assignee:
BAOSHAN IRON & STEEL (CN)
International Classes:
C23C22/40
Domestic Patent References:
| WO2004050581A2 | 2004-06-17 |
Foreign References:
| CN105331966A | 2016-02-17 | |||
| CN103946421A | 2014-07-23 | |||
| CN1614089A | 2005-05-11 | |||
| JP2007224361A | 2007-09-06 | |||
| CN101560655A | 2009-10-21 |
Other References:
See also references of EP 3385405A4
Attorney, Agent or Firm:
SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)
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