Preparation method of hot dip galvanizing layer vanadate conversion film

A vanadate, conversion coating technology, applied in the direction of metal material coating process, can solve the problems of vanadate conversion coating corrosion resistance that needs to be further improved, and many pinholes on the surface of the coating, so as to improve the integrity The effect of interfaciality, fast formation speed, and less three wastes

Inactive Publication Date: 2020-01-10
安徽汇源镀锌有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the prior art, the vanadate conversion coating produced by conventional technical means has appearance defects such as many pinholes on the surface of the film layer, and the corrosion resistance of the vanadate conversion coating needs to be further improved.

Method used

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  • Preparation method of hot dip galvanizing layer vanadate conversion film

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Embodiment 1

[0022] A preparation method of a hot-dip galvanized layer vanadate conversion film, comprising the following steps:

[0023] (1) In parts by weight, mix 10 parts of tetrabutylammonium fluoride and 40 parts of caprolactam, heat at 75°C until the solid is complete, then add 650 parts of water to it, and mix well to obtain an ionic liquid aqueous solution;

[0024] (2) In parts by weight, 16 parts of sodium metavanadate, 5 parts of sodium metaborate, 1 part of 3-bromopropylamine hydrobromide, 0.2 parts of N,N-dioctylaminoethylglycine hydrochloride, After mixing 40 parts of ionic liquid aqueous solution and 950 parts of water evenly, and then adjusting its pH to 2.0 with a hydrochloric acid solution with a mass fraction of 15%, the conversion solution was obtained;

[0025] (3) The hot-dip galvanized sheet is washed with degreasing water and dried, wherein the temperature of the drying treatment is 80 ° C, and the time of the drying treatment is 3 hours. After drying, the surface...

Embodiment 2

[0027] A preparation method of a hot-dip galvanized layer vanadate conversion film, comprising the following steps:

[0028] (1) In parts by weight, mix 13 parts of tetrabutylammonium fluoride and 45 parts of caprolactam, heat at 78°C until the solid is complete, then add 680 parts of water to it, and mix well to obtain an ionic liquid aqueous solution;

[0029] (2) In parts by weight, 20 parts of sodium metavanadate, 7 parts of sodium metaborate, 3 parts of 3-bromopropylamine hydrobromide, 0.4 parts of N,N-dioctylaminoethylglycine hydrochloride, After 45 parts of ionic liquid aqueous solution and 980 parts of water are uniformly mixed, and then the pH is adjusted to 2.5 by using a hydrochloric acid solution with a mass fraction of 15%, to obtain a conversion solution;

[0030] (3) The hot-dip galvanized sheet is washed with degreasing water and dried, wherein the temperature of the drying treatment is 85°C, and the time of the drying treatment is 3.5 hours. After drying, the...

Embodiment 3

[0032] A preparation method of a hot-dip galvanized layer vanadate conversion film, comprising the following steps:

[0033] (1) In parts by weight, mix 15 parts of tetrabutylammonium fluoride and 50 parts of caprolactam, heat at 80°C until the solid is complete, then add 700 parts of water to it, and mix well to obtain an ionic liquid aqueous solution;

[0034] (2) In parts by weight, 22 parts of sodium metavanadate, 9 parts of sodium metaborate, 5 parts of 3-bromopropylamine hydrobromide, 0.6 part of N,N-dioctylaminoethylglycine hydrochloride, After mixing 50 parts of ionic liquid aqueous solution and 1000 parts of water evenly, and then adjusting its pH to 3.0 with a hydrochloric acid solution with a mass fraction of 15%, the conversion solution was obtained;

[0035] (3) The hot-dip galvanized sheet is washed with degreasing water and dried, wherein the temperature of the drying treatment is 90 ° C, and the drying time is 4 hours. After drying, the surface is sprayed with...

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Abstract

The invention discloses a preparation method of a hot dip galvanizing layer vanadate conversion film. The preparation method comprises the steps: (1) mixing tetrabutyl ammonium fluoride and caprolactam, heating the mixture until the solid is melted completely, then adding water into the mixture, and uniformly mixing the mixture to obtain an ionic liquid aqueous solution; (2) uniformly mixing sodium metavanadate, sodium metaborate, 3-bromopropylamine hydrobromide, N,N-bis(octyhminoethyl)hydrochloride, the ionic liquid aqueous solution and the water, and adjusting the pH value to 2.0-3.0 by using a hydrochloric acid solution to obtain a conversion solution; and (3) degreasing, washing and drying a hot dip galvanizing plate, spraying ammonia water on the surface of the hot dip galvanizing plate, and after reacting for 5-10 min, immersing the hot dip galvanizing plate in the conversion solution, and washing and drying the hot dip galvanizing plate after conversion treatment to obtain the finished product. The prepared vanadate conversion film is compact and flat in surface, and excellent in quality and corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of hot-dip galvanized sheet preparation, and in particular relates to a preparation method of a vanadate conversion coating of a hot-dip galvanized layer. Background technique [0002] With the rapid development of the industrial level, my country's steel output continues to increase, but metal corrosion has caused huge losses to social production. According to relevant reports, the economic loss caused by metal corrosion in my country is as high as tens of billions of yuan every year. In order to reduce steel corrosion, researchers from various countries have proposed a large number of anti-corrosion means and methods for steel materials, and have been widely used. At present, most of the plates produced by major domestic iron and steel manufacturers adopt hot-dip galvanizing anti-corrosion technology. Due to its good corrosion resistance, simple production process, and low cost, hot-dip galvanized steel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/40C23G1/14
CPCC23C22/40C23G1/14
Inventor 姚道昌
Owner 安徽汇源镀锌有限公司
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