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Zinc-plating material surface processing liquid with compound biological polysaccharide and preparation method thereof

A technology of surface treatment liquid and biological polysaccharide, applied in the direction of metal material coating process, etc., can solve the problems of reducing solution fluidity, high viscosity of chitosan solution, affecting passivation construction performance, etc., and achieves good passivation effect, passivation Excellent anti-corrosion effect and good corrosion resistance

Active Publication Date: 2018-12-28
南京京科新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the above method, chitosan has requirements for the dissolution environment, and at the same time, the viscosity of the dissolved chitosan solution is relatively high, which greatly reduces the fluidity of the solution, thereby greatly affecting the passivation workability.

Method used

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  • Zinc-plating material surface processing liquid with compound biological polysaccharide and preparation method thereof
  • Zinc-plating material surface processing liquid with compound biological polysaccharide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The prepared galvanized sheet surface treatment solution is calculated as 100g, and the specific dosage of each component is as follows:

[0040] Inulin 2.5g

[0041] Silane KH-560 8.0g

[0042] Zirconium nitrate 0.5g

[0043] Nano silica sol 1.5g

[0044] pH adjuster is selected according to the adjustment end point

[0045] Yeast powder inulin volume 1 / 10~1 / 50

[0046] Deionized water 87.5g

[0047] The specific method of this embodiment is as follows:

[0048] In a 250ml beaker, add 87.5g deionized water and 2.5g inulin, stir to dissolve the inulin completely, add a small amount of yeast powder, stir and ferment for 3.5h at 35℃ water bath temperature, add 8.0g silane coupling agent at room temperature KH-560, add a few drops of 10% nitric acid to adjust the pH of the system to about 4, continue to stir for 2h, and finally add 0.5g zirconium nitrate and 1.5g nano silica sol, stir for 3h to get the composite inulin plating Zinc plate surface treatment liquid.

Embodiment 2

[0050] The prepared galvanized sheet surface treatment solution is calculated as 100g, and the specific dosage of each component is as follows:

[0051] Inulin 3.0g

[0052] Silane KH-560 6.0g

[0053] Silane KH-570 2.0g

[0054] Zirconium nitrate 0.8g

[0055] Nano silica sol 1.2g

[0056] pH adjuster is selected according to the adjustment end point

[0057] Yeast powder inulin volume 1 / 10~1 / 50

[0058] Deionized water 87.0g

[0059] The specific method of this embodiment is as follows:

[0060] In a 250ml beaker, add 87.0g deionized water and 3.0g inulin, stir to dissolve the inulin completely, add a small amount of yeast powder, stir and ferment for 3.5h at 35℃ water bath temperature, add 6.0g silane coupling agent at room temperature KH-560 and 2.0g silane coupling agent KH-570, add a few drops of 10% nitric acid to adjust the pH of the system to about 4, continue to stir for 2.0h, and finally add 0.8g zirconium nitrate and 1.2g nano silica sol , Stir for 3h to get the surface treatme...

Embodiment 3

[0062] The prepared galvanized sheet surface treatment solution is calculated as 100g, and the specific dosage of each component is as follows:

[0063] Inulin 3.5g

[0064] Silane KH-570 8.0g

[0065] Zirconium nitrate 1.0g

[0066] Nano silica sol 1.0g

[0067] pH adjuster is selected according to the adjustment end point

[0068] Yeast powder, inulin volume 1 / 10~1 / 50

[0069] Deionized water 86.5g

[0070] The specific method of this embodiment is as follows:

[0071] In a 250ml beaker, add 86.5g deionized water and 3.5g inulin, stir to completely dissolve the inulin, add a small amount of yeast powder, stir and ferment for 3.5h at 35℃ water bath temperature, add 8.0g silane coupling agent at room temperature KH-570, add a few drops of 10% nitric acid to adjust the pH of the system to about 4, continue to stir for 2.0h, and finally add 1.0g zirconium nitrate and 1.0g nano silica sol, stir for 3h to get the composite inulin Surface treatment liquid for galvanized sheet.

[0072] For a mo...

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Abstract

The invention relates to the field of metal surface processing, in particular to metal surface passivation processing liquid, specifically, is zinc-plating material surface processing liquid with compound biological polysaccharide and a preparation method thereof. The zinc-plating material surface processing liquid with the compound biological polysaccharide comprises inulin, organosilane, an inorganic slow-release agent, nanometer silica sol, a pH regulator, and deionized water. The zinc-plating material surface processing liquid has good liquidity and better passivation anti-corrosion effect. The passivation liquid has excellent corrosion resistance. The passivation liquid is applied to a zinc-plating plate, after drying, a dropping experiment is conducted with a 5% copper sulfate solution, the longest blackening time of a drop can be as long as 630s, the adhesive force of a passivation film can reach the first level, after 72 hours of a neutral salt spray resistance test, the corrosion area is less than 5%, and therefore excellent passivation effect is achieved.

Description

Technical field [0001] The invention relates to the field of metal surface treatment, in particular to a metal surface passivation treatment liquid, and in particular to a galvanized material surface treatment liquid containing a double-nucleated biological polysaccharide and a preparation method thereof. Background technique [0002] With the promulgation of the EU RoHS Directive, the traditional Cr(Ⅲ) and Cr(Ⅵ) passivation technologies have been greatly impacted, which has promoted the development of new chromium-free passivation technologies. After years of research and development, chromium-free passivation technology on metal surfaces has made gratifying progress, and a number of mature passivation systems have been formed: one is the passivation technology of inorganic components, including silicate passivation and molybdate Passivation and titanate passivation, etc.; the second is organic passivation treatment technology, such as organic silane passivation, organic acid pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/53
CPCC23C22/53
Inventor 赵强花书贵顾小康顾小敏汤晓东
Owner 南京京科新材料研究院有限公司
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