Ammonium-salt-free plating assistant agent used for hot dip galvanizing and technical methods for preparation and use thereof

A plating flux and hot-dip plating technology, which is applied in hot-dip plating process, metal material coating process, coating, etc., can solve problems such as easy occurrence of missing plating and unsatisfactory plating effect, and achieve reduction of pollution, Reduce the generation of smoke and dust and improve the effect of working environment

Active Publication Date: 2009-11-11
CHANGSHU FENGFAN POWER EQUIP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These fluxes did not completely remove ammonium chloride, but only added fluoride or rare earth salts to improve the fluxing effect of hot-dip galvanized-aluminum; or completely replaced ammonium chloride with potassium chloride or sodium chloride, although reducing smoke and dust, but the effect of plating flux is not ideal, and it is easy to cause missing plating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: get fluorocarbon surfactant such as potassium perfluorooctane sulfonate 1Kg, coconut oleic acid alkanolamide 20Kg, zinc chloride 800Kg, sodium chloride 300Kg, 10000L tap water are made into plating aid solution, fully stir , Heat the flux to 40°C. Immerse 480Kg of 75×75×6 angle steel with a length of 400mm after degreasing, pickling, derusting and rinsing into the fluxing solution. After the angle steel is taken out of the fluxing solution, it is dried on a drying bed at a temperature of 40°C for 22 minutes, and then the angle steel is immersed in zinc. When galvanized in the bath, only a small amount of smoke is generated on the surface of the zinc solution when immersed. After dipping for 1 minute, the angle steel is taken out of the zinc solution and cooled in a water bath. It is found that the surface of the angle steel has no missing plating phenomenon, and the coating color is uniform.

Embodiment 2

[0018] Embodiment 2: get fluorocarbon surfactant such as N-propyl perfluorooctyl sulfonyl quaternary ammonium iodide 20Kg, fatty acid alkanolamide 40Kg, zinc chloride 3500Kg, sodium chloride 1000Kg, 10000L tap water is made into plating flux Solution, stir well, and heat the fluxing solution to 70°C. Immerse 600Kg of 75×75×8 angle steel with a length of 400mm after degreasing, pickling, derusting and rinsing into the fluxing solution. After the angle steel is taken out of the fluxing solution, it is dried on a drying bed at a temperature of 140°C for 5 minutes, and then the angle steel is immersed in zinc When galvanized in the bath, only a small amount of smoke is generated on the surface of the zinc solution when immersed. After dipping for 1 minute, the angle steel is taken out of the zinc solution and cooled in a water bath. It is found that the surface of the angle steel has no missing plating phenomenon, and the coating color is uniform.

Embodiment 3

[0019] Embodiment 3: get fluorocarbon surfactant such as N-methyl perfluorooctyl sulfonylaminoethanol 12Kg, alkanolamide phosphoric acid ester 60Kg, zinc chloride 2400Kg, sodium chloride 1600Kg, 20000L tap water is made into plating flux solution , stir well, and heat the fluxing solution to 80°C. After degreasing, pickling, derusting and rinsing, 880Kg of 50×50×4 angle steel with a length of 360mm is immersed in the fluxing solution. After the angle steel is taken out of the fluxing solution, it is dried on a drying bed at a temperature of 110°C for 5 minutes, and then the angle steel is immersed in zinc. When galvanized in the bath, the amount of dust generated on the surface of the zinc solution is very small. After dipping for 1 minute, the angle steel is taken out of the zinc solution and cooled in a water bath. It is found that there is no missing plating phenomenon on the surface of the angle steel, and the coating color is uniform.

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PUM

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Abstract

The invention provides an ammonium-salt-free plating assistant agent used for hot dip galvanizing and technical methods for preparation and use thereof, belonging to the technical field of the surface plating technique of steel and iron materials. The technical proposal is as follows: the aqueous solution of the plating assistant agent has the following components of zinc chloride, sodium chloride, a nonionic surface active agent (cocinic acid alkanolamide, fatty acid alkanolamide or alkanolamide phosphate ester) and a perfluoro-carbon type surface active agent with the respective proportion in sequence of 80 to 350g/L, 30 to 100g/L, 2 to 4g/L and 0.1 to 2g/L, and the balance of water. When the plating assistant agent is used for hot dip plating: the steel and iron product after oil and dust removing is dipped into the ammonium-salt-free plating assistant agent for plating assistant treatment firstly, the temperature is controlled to be in the range of 40 to 80 DEG C, then drying or baking is carried out at the temperature of 40 to 140 DEG C so as to lead the surface of the product to be adhered with a layer of even plating assistant film, and then the obtained product is dipped into molten zinc for hot dip plating. The invention has the advantages that the plating assistant agent is not added with ammonium salt, thus being capable of greatly reducing the generation of dusts when in hot dip plating, reducing pollution to environment and improving working environment.

Description

technical field [0001] The invention provides a special-purpose plating flux for hot-dip plating and a use method thereof, belonging to the technical field of surface plating technology of iron and steel materials. Background technique [0002] Flux plating is the process of immersing the pickled steel parts in a zinc ammonium chloride flux with a certain composition, and then forming a thin layer of zinc ammonium chloride salt film on the surface of the parts. The fluxing process cleans the surface of steel parts, removes the iron salts or oxides left on the surface of the parts after pickling and cleaning, and makes the steel parts have greater surface activity when they enter the zinc bath. Depositing a layer of salt film on the surface of steel parts can prevent the steel parts from rusting in the air during the period from the fluxing pool to the zinc pot. When the iron and steel parts that have been treated by the plating treatment are immersed in the zinc solution, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/02C23C2/06
Inventor 范立义何明奕赵月华赵晓军桑琴华王胜民吴备军
Owner CHANGSHU FENGFAN POWER EQUIP
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