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Chromium-free passivation solution and hot-dip galvanized metal material

A chrome-free passivation and hot-dip galvanizing technology, which is applied in metal material coating process, hot-dip plating process, coating, etc., can solve the problems of poor corrosion resistance, heat resistance and fingerprint resistance, and achieve good durability corrosion resistance, excellent roll coating performance, and short film forming time

Inactive Publication Date: 2014-05-07
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the defects of the poor corrosion resistance, heat resistance and fingerprint resistance of the chromium-free passivation solution in the prior art, and provide a kind of corrosion resistance, water resistance, heat resistance and fingerprint resistance. Good chrome-free passivation solution

Method used

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  • Chromium-free passivation solution and hot-dip galvanized metal material

Examples

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Embodiment 1

[0043] This embodiment is used to illustrate the chromium-free passivation solution provided by the present invention and its preparation method.

[0044] Put 20g of tannic acid in the container, add 100mL of distilled water to dissolve it completely; slowly drop 20mL of silane coupling agent KH550 into the above container within 2 minutes, stir for 5 minutes until the reaction is complete; add 0.5g of dispersing agent (boric acid), 0.005g defoamer (polyether modified polydimethylsiloxane, Guangzhou Silok, silok2243) and 0.005g stabilizer (isopropanol), stir until completely dissolved; add 25g of H 2 TiF 6 Aqueous solution (30% by weight), stirred for 5 minutes until uniform; add 10g nano-SiO 2powder (purchased from GE Company of the United States, RNS-E, average particle size 20nm), stirred for 10 minutes until the solution was in a uniform and stable phase; added 180mL silicon acrylic emulsion (purchased from Nantong Shengda, SD-5281), and then distilled water to volume to...

Embodiment 2

[0046] This embodiment is used to illustrate the chromium-free passivation solution provided by the present invention and its preparation method.

[0047] Put 24g of phytic acid in the container, add 100mL of distilled water to dissolve it completely; slowly drop 15mL of silane coupling agent KH560 into the above container within 2 minutes, stir for 5 minutes until the reaction is complete; add 0.5g of dispersant (boric acid), 0.005g defoamer (polyether modified polydimethylsiloxane, Guangzhou Silok, silok2243) and 0.010g stabilizer (isopropanol), stir until completely dissolved; add 25g of sulfuric acid oxygen Titanium solution (40% by weight), stirred for 5 minutes until uniform; added 30g of silica sol (30% by weight), stirred for 10 minutes until the solution was in a uniform and stable phase; added 180mL of acrylic resin film-forming agent (purchased from A-3418), and then distilled water to 1L to obtain the chromium-free passivation solution S2 provided by the present in...

Embodiment 3

[0049] This embodiment is used to illustrate the chromium-free passivation solution provided by the present invention and its preparation method.

[0050] Put 15g of tannic acid in the container, add 100mL of distilled water to dissolve it completely; slowly drop 10mL of silane coupling agent KH570 into the above container within 2 minutes, stir for 5 minutes until the reaction is complete; add 0.5g of dispersing agent (boric acid), 0.010g defoamer (polyether modified polydimethylsiloxane, Guangzhou Silok, silok2243) and 0.010g stabilizer (isopropanol), stir until completely dissolved; add 20 grams of sulfuric acid Titanium oxide aqueous solution (40% by weight), stirred for 5 minutes until uniform; Added 30g of sodium silicate aqueous solution with a modulus of 2 and a concentration of 30% by weight, and stirred for 10 minutes until the solution was a uniform and stable phase; Added 180mL polyurethane resistant Yellow resin (purchased from Jinjiang Jianhua, Fujian, 812), and ...

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Abstract

The invention relates to a chromium-free passivation solution and a hot-dip galvanized metal material. The chromium-free passivation solution is prepared from a raw material mixture through uniform mixing. The raw material mixture contains one or more silane coupling agents and water. The chromium-free passivation solution is characterized in that the raw material mixture also contains one or more titanium compounds, one or more inorganic silicon compounds, one or more water-soluble film-forming agents and tannic acid or phytic acid, wherein the one or more titanium compounds are selected from hexafluorotitanic acid, ammonium hexafluorotitanate, potassium hexafluorotitanate, metatitanic acid and titanyl sulfate and the one or more inorganic silicon compounds are selected from nanoscale silica powder, silica sol and sodium silicate. The chromium-free passivation solution has good corrosion resistance, good water resistance, good heat resistance, good fingerprint resistance and excellent roller coating performances. A passivation method adopting the chromium-free passivation solution can greatly shorten treatment time, can be utilized for passivation plate production in a spray mode or a roller coating mode, and also can avoid an oiling process in galvanized plate production.

Description

technical field [0001] The invention relates to a chrome-free passivation solution and a hot-dip galvanized metal material. Background technique [0002] In order to prevent the galvanized sheet from rusting during transportation, the hot-dip galvanized sheet factory will coat a layer of anti-rust oil film on the surface of the galvanized sheet before leaving the factory. However, when users use hot-dip galvanized sheets, they require bare parts to have excellent anti-corrosion properties to prevent corrosion and rust and reduce their service life. Therefore, users must use galvanized sheets that use passivation liquid for surface anti-rust treatment. [0003] The most widely used method to improve the corrosion resistance of galvanized coatings is chromate passivation. This passivation method has simple process, low cost and good corrosion resistance. However, since this passivation method involves Pb, Cd, Hg, Cr 6+ The use and release of many substances that seriously po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/34C23C22/53C23C2/06
CPCC23C2222/20
Inventor 梅东生许哲峰郭太雄徐权陈永娄燕周一林
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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