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Surface treatment solution for galvanized material containing composite biological polysaccharide and preparation method thereof

A technology of surface treatment liquid and biological polysaccharide, which is applied in the coating process of metal materials, etc., can solve the problems of reducing solution fluidity, high viscosity of chitosan solution, and affecting passivation construction performance, etc., to achieve good passivation effect and passivation Good chemical anti-corrosion effect, good corrosion resistance effect

Active Publication Date: 2020-09-18
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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  • Surface treatment solution for galvanized material containing composite biological polysaccharide and preparation method thereof
  • Surface treatment solution for galvanized material containing composite 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 on the basis of 100g, and the specific consumption 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 concrete 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 at 35°C water bath temperature for 3.5h, add 8.0g silane coupling agent at room temperature For KH-560, add a few drops of nitric acid with a mass fraction of 10% to adjust the pH value of the system to about 4, continue to stir for 2 hours, and finally add 0.5g of zirconium nitrate and 1.5g of nano-silica sol, and stir for 3 hours to ...

Embodiment 2

[0050] The prepared galvanized sheet surface treatment solution is calculated on the basis of 100g, and the specific consumption 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 concrete 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 at 35°C water bath temperature for 3.5h, add 6.0g silane coupling agent at room temperature KH-560 and 2.0g silane coupling agent KH-570, add a few drops of nitric acid with a mass fraction of 10% to adjust the pH of the system to about 4, continue stirring for 2.0h, and finally add 0.8g zirconium nitrate a...

Embodiment 3

[0062] The prepared galvanized sheet surface treatment solution is calculated on the basis of 100g, and the specific consumption 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 concrete method of this embodiment is as follows:

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

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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 solution, in particular to a galvanized material surface treatment solution containing multiple nuclear biological polysaccharides and a preparation method thereof. Background technique [0002] With the promulgation of the EU RoHS Directive, the traditional Cr(Ⅲ) and Cr(Ⅵ) passivation technology has been greatly impacted, thus promoting the development of new chromium-free passivation technology. After years of research and development, the metal surface chromium-free passivation technology has made gratifying progress, and a number of relatively mature passivation systems have been formed: one is the passivation technology of inorganic components, including silicate passivation, molybdate passivation passivation and titanate passivation, etc.; the second is organic passivation treatment technology, such as organosilane passivation, or...

Claims

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Application Information

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Patent Type & Authority Patents(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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