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1. (AU2016363456) Chromium-free surface-treated tinplate, production method and surface treating agent therefor

Office : Australia
Application Number: 2016363456 Application Date: 29.11.2016
Publication Number: 2016363456 Publication Date: 08.06.2017
Publication Kind : A1
Prior PCT appl.: Application Number:CN2016107673 ; Publication Number: Click to see the data
IPC:
C23C 22/40
C CHEMISTRY; METALLURGY
23
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
C
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
22
Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
05
using aqueous solutions
06
using aqueous acidic solutions with pH 6
40
containing molybdates, tungstates or vanadates
CPC:
C23C 22/40
C23C 2222/20
C23C 22/76
C23C 22/78
Applicants: Baoshan Iron & Steel Co., Ltd.
Inventors:
Agents: Davies Collison Cave Pty Ltd
Priority Data: 201510854283.0 30.11.2015 CN
Title: (EN) Chromium-free surface-treated tinplate, production method and surface treating agent therefor
Abstract:
(EN) 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.
Also published as:
SG11201803648XMYPI 2018701922EP3385405US20180347051WO/2017/092648