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A kind of hot-dip galvanizing environmental protection passivation solution and preparation method thereof

A technology of passivation solution and hot-dip galvanizing, which is applied in the coating process of metal materials, etc., can solve the problems of cumbersome operation, high cost, and poor corrosion resistance, and achieve simple passivation process, good protection and corrosion resistance Good results

Active Publication Date: 2018-11-27
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the passivation effects of these two methods are not ideal. Some films are loose, not dense enough, and have poor corrosion resistance. Neither inorganic passivation nor organic passivation can reach the level of industrial application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The components and contents of the hot-dip galvanizing environment-friendly passivation solution described in this embodiment are: acrylic resin solution 80mL / L, sodium tungstate 10g / L, sodium nitrate 15g / L, thiourea 5g / L, sodium fluoride 8g / L L, sodium citrate 5g / L, H 2 o 2 2mL / L, and the rest is deionized water. Among them, the acrylic resin solution is a mixture of acrylic resin, isopropanol, and ammonia water with a mass fraction of 26%, wherein the mass percentage of acrylic resin is 55%, and the mass fraction of isopropanol is Percentage is 25%, and the mass percentage of the ammoniacal liquor of 26% is 20%.

[0015] Prepare 1L hot-dip galvanizing environment-friendly passivation solution described in this embodiment, the specific steps are as follows:

[0016] (1) Take a clean beaker, add 50mL of deionized water, add 10g of sodium tungstate to the beaker, place the beaker in a 60°C water bath and heat, stir until completely dissolved, and cool to room temperatu...

Embodiment 2

[0026] The components and contents of the hot-dip galvanizing environment-friendly passivation solution described in this embodiment are: acrylic resin solution 100mL / L, sodium tungstate 15g / L, sodium nitrate 18g / L, thiourea 10g / L, sodium fluoride 12g / L L, sodium citrate 10g / L, H 2 o 2 3mL / L, the rest is deionized water, wherein the acrylic resin solution is a mixture of acrylic resin, isopropanol, and ammonia water with a mass fraction of 26%, wherein the mass percentage of acrylic resin is 30%, and the mass fraction of isopropanol Percentage is 50%, and the mass percentage of the ammoniacal liquor of 26% is 20%.

[0027] Prepare 1L hot-dip galvanizing environment-friendly passivation solution described in this embodiment, the specific steps are as follows:

[0028] (1) Take a clean beaker, add 50mL of deionized water, add 15g of sodium tungstate to the beaker, place the beaker in a 50°C water bath, heat it, stir until it is completely dissolved, and cool to room temperatur...

Embodiment 3

[0038] The components and contents of the hot-dip galvanizing environment-friendly passivation solution described in this embodiment are: acrylic resin solution 120mL / L, sodium tungstate 25g / L, sodium nitrate 20g / L, thiourea 15g / L, sodium citrate 15g / L L, sodium fluoride 18g / L, H 2 o 2 4mL / L, the rest is deionized water, wherein the acrylic resin solution is a mixture of acrylic resin, isopropanol, and ammonia water with a mass fraction of 26%, wherein the mass percentage of acrylic resin is 48%, and the mass fraction of isopropanol Percentage is 44%, and the mass percentage of the ammoniacal liquor of 26% is 8%.

[0039] Prepare 1L hot-dip galvanizing environment-friendly passivation solution described in this embodiment, the specific steps are as follows:

[0040] (1) Take a clean beaker, add 50mL of deionized water, add 25g of sodium tungstate to the beaker, place the beaker in a 55°C water bath and heat, stir until completely dissolved, and cool to room temperature;

...

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PUM

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Abstract

The invention discloses a hot galvanized environment-friendly passivation solution and a preparation method thereof and belongs to the field of surface treatment of metal materials. The solution is prepared from the following components: 80mL / L to 150mL / L of an acrylic resin solution, 10g / L to 30g / L of sodium tungstate, 15g / L to 25g / L of sodium nitrate, 5g / L to 20g / L of thiourea, 8g / L to 22g / L of sodium fluoride, 5g / L to 20g / L of sodium citrate, 2mL / L to 5mL / L of H2O2 and the balance of de-ionized water; the acrylic resin solution is prepared from the following components in percentage by mass: 30 percent to 55 percent of acrylic resin, 25 percent to 50 percent of isopropyl alcohol and 8 percent to 20 percent of ammonia water with the mass percent of 26 percent. The invention further discloses the preparation method of the hot galvanized environment-friendly passivation solution; the passivation solution does not contain chromate with relatively high toxicity and does not cause injuries to the environment and human bodies; one layer of flat, smooth and uniform passivation membrane is formed on the surface of a galvanized layer prepared from the passivation solution provided by the invention, the passivation membrane has a very strong corrosion resistance performance, and the corrosion speed of a plated layer can be effectively slowed down; the time of forming white rust in a neutral salt mist test is more than 80 hours.

Description

technical field [0001] The invention relates to a hot-dip galvanizing environment-friendly passivation solution and a preparation method thereof, belonging to the technical field of metal surface treatment. Background technique [0002] Hot-dip galvanizing technology is a widely used and easy-to-operate anti-corrosion technology for steel materials. Hot-dip galvanizing is also called hot-dip galvanizing and hot-dip galvanizing. It is to immerse the rust-removed steel parts in the molten zinc solution at about 500 ° C, so that the surface of the steel components is attached with a zinc layer, so as to achieve the purpose of anti-corrosion. It is a kind of Effective metal anti-corrosion method, mainly used in metal structure facilities in various industries. Hot-dip galvanizing is developed from the older hot-dip galvanizing method, and the hot-dip galvanizing industry has developed on a large scale with the rapid development of cold-rolled strip steel in recent decades. Hot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/44
CPCC23C22/44
Inventor 范云鹰卫明
Owner KUNMING UNIV OF SCI & TECH