CHROMIUM-FREE INORGANIC SURFACE TREATMENT AGENT FOR GALVANIZED STEEL SHEET, FINISHED GALVANIZED STEEL SHEET AND MANUFACTURING METHOD THEREFOR

WIPO Patent Application WO/2024/041599

A1

Disclosed in the present invention is a chromium-free inorganic surface treatment agent. The surface treatment agent comprises, in mass percent, 11.5-15% of total solids, the remainder being water. The total solids comprise the following components in mass percent: 45-65% of a compound silane coupling agent A; 25-45% of a surface-modified water-based silica sol B; 0.5-1% of a water-soluble phosphorus-containing compound C, based on the mass of the phosphorus element; 1-6% of a water-soluble fluorine-containing compound D, based on the mass of the fluorine element; and 1%-10% of a lubricating aid E, wherein the compound silane coupling agent A is formed by compounding the following four types of silane coupling agent monomers: a silane A1 having an epoxy group, a silane A2 having a monoamino group, a silane A3 having an alkyl group, and a silane A4 having a vinyl group.

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WEI XING (CN)
DAI YIGANG (CN)
MA YUAN (CN)
FANG WENQI (CN)

PCT/CN2023/114608

February 29, 2024

August 24, 2023

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BAOSHAN IRON & STEEL (CN)

C23C22/07; C09D5/08; C09D183/08; C23C22/34; C23C22/74

WO2013073401A1

2013-05-23

JP2007039715A	2007-02-15
CN109252150A	2019-01-22
JP2011068996A	2011-04-07
CN105441920A	2016-03-30
US20110293951A1	2011-12-01
CN107779853A	2018-03-09

WATSON & BAND INTELLECTUAL PROPERTY AGENT LTD. (CN)

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