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Water-soluble aluminum and aluminum alloy soft soldering brazing flux as well as preparation method thereof

An aluminum alloy and soft soldering technology, which is applied in welding equipment, metal processing equipment, welding media, etc., can solve problems such as poor soldering effect, and achieve the effects of high activity, strong process adaptability, and strong wetting force

Active Publication Date: 2009-07-15
YIK SHING TAT INDUSTRIALCO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flux is in the form of paste and is suitable for the inner core of solder wire. At the same time, the flux contains a large amount of resin carrier with no flux effect, which makes the flux effect poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Ammonium fluoroborate 15%

[0042] (2) Zinc chloride 8%

[0043] (3) Stannous chloride 6%

[0044] (4) Triethanolamine 32%

[0045] (5) Hydroxyethylethylenediamine 30%

[0046] (6) Absolute ethanol 10%

[0047] (7) Isopropanol 7%

[0048] (8) Benzotriazole 2%

[0049] (9) 301 resin 2%

[0050] Preparation method: Add ammonium fluoroborate, zinc chloride, and stannous chloride to an amine solvent, and stir continuously at 85°C for 32 minutes to fully dissolve and mix the raw materials. After the solvent is cooled to 40°C, add anhydrous Ethanol, isopropanol, benzotriazole and 301 resin were stirred evenly, and the soldering flux was obtained by standing and filtering.

Embodiment 2

[0052] (1) Ammonium fluoroborate 20%

[0053] (2) Zinc stearate 10%

[0054] (3) Stannous octoate 8%

[0055] (4) Monoethanolamine 22%

[0056] (5) NN-Dimethyldodecylamine 30%

[0057] (6) Absolute ethanol 15%

[0058] (7) Benzotriazole 3%

[0059] (8) 302 resin 2%

[0060] Preparation method: Add ammonium fluoroborate, zinc stearate, and stannous octoate into monoethanolamine and NN-dimethyldodecylamine solvent, and stir continuously at 75°C for 35 minutes to fully dissolve and mix the raw materials; After cooling to 35°C, add absolute ethanol and stir evenly, then stand and filter to obtain the aluminum soldering flux.

Embodiment 3

[0062] (1) Ammonium fluoroborate 8%

[0063] (2) Zinc fluoride 10%

[0064] (3) SnF2 8%

[0065] (4) NN-Dimethyldodecylamine 25%

[0066] (5) Diethylenediamine 30%

[0067] (6 absolute ethanol 18%

[0068] (7) Isopropanol 12%

[0069] (8) Imidazoline 1%

[0070] (9) 302 resin 3%

[0071] Preparation method: Add ammonium fluoroborate, zinc fluoride, and stannous fluoride into NN-dimethyldodecylamine and diethylenediamine solvent, and stir continuously at 70°C for 30 minutes to fully dissolve and mix the raw materials. After the solvent is cooled to 32°C, add absolute ethanol, isopropanol, imidazoline and 302 resin and stir evenly, then stand and filter to obtain the aluminum soldering flux.

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Abstract

The invention relates to a water-soluble aluminum, an aluminum alloy soldering agent and a preparation method thereof. The soldering agent mainly comprises 10-24 percent of stripper, 5-16 percent of covering agent, 40-64 percent of amine surfactant, 1-6 percent of film forming agent, 1-4 percent of inhibiter and balance diluting agent by weight. The soldering agent has high activity so as to obviously reduce the surface tension of such relative soldering materials as soldering aluminum and aluminum alloy and improve the wettability thereof, and has moderate viscosity to be well adapted in the prior art and especially to soldering of aluminum enamelled wire and soldering of radiators and condenser pipes made of aluminum and aluminum alloy.

Description

technical field [0001] The invention relates to a flux for aluminum and aluminum alloy soldering and a preparation method thereof. The flux is suitable for soldering of aluminum and aluminum alloys in electrical and electronic products and radiators and condensers made of aluminum and aluminum alloys Soldering, the flux of the present invention is also suitable for the soldering of stainless steel and nickel-based alloy materials. Background technique [0002] Aluminum and aluminum alloys have low density, low production cost, and thermal conductivity and electrical conductivity are similar to copper. Therefore, aluminum and aluminum alloys are widely used in the manufacture of electrical and electronic equipment, radiators and condensers. The brazing of aluminum and aluminum alloys is much more difficult than other metals, mainly because there is a dense and stable oxide film (Al203) on the surface of aluminum and aluminum alloys. This layer of oxide film is very stable, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/363
Inventor 马鑫张新平徐金华刘亮岐
Owner YIK SHING TAT INDUSTRIALCO LTD
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