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Hot dipping plating assistant agent containing fluoro-carbon surfactant

An active agent, carbon surface technology, applied in hot dip plating process, coating, metal material coating process, etc., to achieve the effect of improving stability, avoiding re-oxidation, and improving wettability

Inactive Publication Date: 2009-10-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technology of adding fluorocarbon chain surfactants to the fluxing agent of hot-dip galvanizing base and zinc-aluminum alloy to improve the fluxing effect has not been reported yet.

Method used

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  • Hot dipping plating assistant agent containing fluoro-carbon surfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Take 2Kg of perfluorooctane sulfonyl quaternary iodide, 18Kg of N-propyl perfluorooctane sulfonamide, and 20Kg of N-hydroxyethyl perfluorooctane sulfonamide, and compound them into a composite fluorine-carbon surface Active agent 40Kg. Get this composite tensio-active agent 30Kg and join into volume and be 3m 3 In an aqueous solution composed of 20% ammonium chloride+60% zinc chloride by mass fraction, fully stir evenly. Immerse 200Kg of 75×75×6 angle steel with a length of 600mm for the iron tower after degreasing, pickling, derusting and rinsing into the fluxing solution. ~85°C, it was found that the surface of the angle steel had a well-covered and uniform small snowflake salt film, and the salt film did not decompose; then the angle steel was immersed in the zinc bath in the zinc pot for galvanizing, and no zinc spattering occurred; the angle steel was lifted out of the zinc bath After cooling in a water bath, it was found that there was no missing plat...

Embodiment 2

[0027] Embodiment 2: Take 10Kg of perfluorooctane sulfonyl quaternary iodide, 5Kg of N-propyl perfluorooctane sulfonamide, and 5Kg of N-hydroxyethyl perfluorooctane sulfonamide, and compound them into a composite fluorine-carbon surface Active agent 20Kg. Get this composite tensio-active agent 10Kg and join into volume and be 10m 3 In the plating flux consisting of 20% ammonium chloride + 50% zinc chloride by mass fraction, stir well and evenly. Immerse 700Kg of 75×75×6 angle steel with a length of 600nm for the iron tower after degreasing, pickling, derusting and rinsing into the fluxing solution. At ~85°C, it was found that the surface of the angle steel had a well-covered and uniform small snowflake salt film, and the salt film did not decompose; then the angle steel was immersed in the zinc-aluminum liquid in the zinc pot for galvanizing, and no zinc splashing occurred; the angle steel was removed from the zinc liquid It is proposed that after cooling in a water bath, th...

Embodiment 3

[0028] Example 3: Take 18Kg of perfluorooctane sulfonyl quaternary iodide, 1Kg of N-propyl perfluorooctane sulfonamide, and 1Kg of N-hydroxyethyl perfluorooctane sulfonamide, and compound them into a composite fluorine-carbon surface Active agent 20Kg. Take 1Kg of this composite surfactant and join it to a volume of 10m 3 In the plating flux consisting of 30% ammonium chloride + 40% zinc chloride by mass fraction, fully stir evenly. Immerse 600Kg of 75×75×6 angle steel with a length of 600mm for the iron tower after degreasing, pickling, derusting and rinsing into the fluxing solution. At ~75°C, it was found that the surface of the angle steel had a well-covered and uniform small snowflake salt film, and the salt film did not decompose; then the angle steel was immersed in the zinc solution in the zinc pot for galvanizing, and no zinc splashing occurred, and the steel parts were immersed in the zinc solution There is less smoke and dust generated during the process; after th...

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Abstract

The invention provides a hot dipping plating assistant agent containing a fluoro-carbon surfactant, which belongs to the technical field of surface plating process of steel materials. A compounded fluoro-carbon surfactant is added in plating assistant agents which take zinc chloride, or zinc chloride and ammonium chloride as the main part, to improve the coating effect of the plating assistant agent and the wetting property of the plating assistant agent which contacts with zinc-based molten metal. The method comprises the steps: nonionic N-propyl, N-ethoxyl perfluorooctylsulfonyl amide and cationic perfluorooctanosulfonyl quaternary iodide are mixed to form a compounded fluoro-carbon surfactant, and then the compounded fluoro-carbon surfactant is blended with water solution which takes zinc chloride, or zinc chloride and ammonium chloride as the main part to form the hot dipping plating assistant agent containing the fluoro-carbon surfactant. The addition level of the compounded fluoro-carbon surfactant in the hot dipping plating assistant agent containing the fluoro-carbon surfactant is 0.1 to 10 g / L, wherein the mass fraction of the perfluorooctanosulfonyl fluoride quaternary iodide accounts for 5 to 90 percent, and the rest are N-propyl and N-ethoxyl perfluorooctylsulfonyl amide. The operation temperature and the plating assistant drying temperature are equal with that during the plating assistant process of the traditional zinc chloride and zinc chloride salt system plating assistant agent. The hot dipping plating assistant agent has the advantages that the preparation operation of the plating assistant agent is simple, the wetting effect of the surface of a steel finished piece in zinc liquid is good after plating, the uniformity of the plating layer can be improved, the plating leakage ratio is reduced, and the use level of the chlorine salt in the plating assistant agent can be also reduced.

Description

technical field [0001] The invention relates to a hot-dip plating flux containing a fluorine-carbon surfactant, which uses a composite fluorine-carbon surfactant and a chloride salt as a hot-dip flux for hot-dip galvanizing and zinc plating. The invention relates to a base alloy, which belongs to the technical field of surface coating technology of iron and steel materials. Background technique [0002] So far, zinc, zinc-based multi-element alloys and zinc-aluminum alloy coatings are still used for long-term protection of steel products and product surfaces. Among hot-dip galvanized products, continuous galvanized products such as steel plates and steel wires are mainly used in automobiles, household appliances, electrical and mechanical equipment ; Batch galvanized products are mainly: high-voltage iron towers, electric power fittings, roads, construction, communications, marine transportation and oil facilities, etc. Hot-dip galvanized products have become an indispensabl...

Claims

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Application Information

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IPC IPC(8): C23C2/02C23C2/06
Inventor 何明奕王胜民赵晓军刘丽彭增华余波涛刘福燕
Owner KUNMING UNIV OF SCI & TECH
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