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Galvanized iron (vanadium) alloy process of acid system

An acid system and electro-galvanizing technology, which is applied in the acid system electro-galvanized iron alloy process, acid system electro-galvanized iron alloy additive, plating solution and process conditions, can solve the problem of large consumption of brightener, slow deposition speed, and low pH value of the plating solution. Stability and other issues, to achieve the effect of fast deposition speed, stable plating solution, and fine crystallization

Active Publication Date: 2010-12-22
湖北奥美斯新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, the general chloride electroplating galvanized iron alloy has the disadvantages of unstable pH value of the plating solution, large consumption of brightener, and slow deposition rate.

Method used

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  • Galvanized iron (vanadium) alloy process of acid system
  • Galvanized iron (vanadium) alloy process of acid system
  • Galvanized iron (vanadium) alloy process of acid system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The preparation of embodiment 1 main brightener

[0052] Prepare by any of the following methods.

[0053] Preparation method 1

[0054] A. Put 123-130g of pyridine 3-carboxylate into a three-necked flask, add 400-440g of water and stir;

[0055] B, adding mass fraction is 40% NaOH to adjust pH to 5.5~6.5;

[0056] C. Heat up to 80-105°C, drop 126-130 g of benzylidene chloride at a rate of 2-3 drops / minute; then heat to reflux temperature, and keep reflux for 3 hours;

[0057] D. Measure the pH value, if it is less than 6.5, adjust the pH value to 6.5-7.5 with 20% NaOH by mass fraction, stir for another half an hour until the pH is stable at 6.5, cool to room temperature and discharge to obtain the main brightener;

[0058] Preparation method 2:

[0059] A. Add 71g of acetone into a three-necked flask equipped with a stirrer, a thermometer and a dropping funnel and a water bath, add a mixture of catalytic amount of potassium fluoride and alumina as a catalyst and 5-...

Embodiment 2

[0062] The preparation of embodiment 2 brighteners:

[0063] The main brightener dosage is: 10-25g / L;

[0064] The dosage of sodium benzoate: 50-150g / L; the dosage of niacin: 0.5-5g / L;

[0065] Carrier brightener dosage: 250-400g / L;

[0066] Water: balance.

[0067] First measure the main brightener and absolute ethanol prepared in Example 1, and prepare the absolute ethanol solution of the main brightener; mix sodium benzoate, nicotinic acid, carrier brightener and an appropriate amount of water, heat to dissolve, and then naturally cool . Then the cooled solution is uniformly mixed with the absolute ethanol solution of the main brightener, and finally the volume is adjusted to 100% with distilled water and deionized water.

Embodiment 3

[0068] The preparation of embodiment 3 complexing agent:

[0069] Sodium citrate dosage: 8-15g / L;

[0070] Ascorbic acid dosage: 1-5g / L;

[0071] Fe 2+ Content: 1.5-2.0g / L;

[0072] V 2+ Content: 0.01-0.02g / L;

[0073] Water: balance.

[0074] First weigh the specified amount of ferrous sulfate and vanadium pentoxide, dissolve the vanadium pentoxide in water, add ascorbic acid to reduce it to divalent. Then add ferrous sulfate, sodium citrate, and ascorbic acid respectively to dissolve them fully.

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Abstract

The invention provides a galvanized iron (vanadium) alloy process of an acid system, belonging to the technical field of electrodeposited protective alloy coatings. An additive in the galvanized iron (vanadium) alloy process comprises a brightening agent and a complexing agent, wherein the brightening agent comprises a main brightening agent, a carrier brightening agent, an auxiliary brightening agent and a complexing agent. On a basis of original potassium chloride galvanized base fluid, the galvanized iron (vanadium) alloy process selects a suitable additive and suitable process conditions so as to surely form a Zn-Fe (V) alloy nano coating with favorable performance, wherein the coating contains 0.2-0.7 percent of iron and approximate 0.01 percent of vanadium. The additive provided by the invention has reasonable and advanced prescription, simple and reasonable preparation method, little environmental pollution, bright and smooth product surface, good quality stability and corrosion resistance, low production cost and simple process.

Description

technical field [0001] The invention relates to an acidic system electroplating galvanized iron (vanadium) alloy process, in particular to an additive, a plating solution and process conditions for an acidic system electrogalvanized iron (vanadium) alloy, and belongs to the technical field of electrodeposited protective alloy coatings. Background technique [0002] The research on zinc-iron alloy electroplating began in the 1950s. Due to the rapid development of the automobile industry in the 1970s, the United States, Japan and other automobile exporting countries considered that the galvanized steel sheets used for the car body could not meet the protection performance of the car driving in the alpine salt sand zone. Therefore, it is studied to plate Zn-Fe or Zn-Ni alloy on the steel-iron substrate to replace the galvanized layer to improve the corrosion resistance. In recent years, there has been another hot research on zinc-iron alloys in China, and it has achieved succes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56
Inventor 吕志
Owner 湖北奥美斯新材料有限公司
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