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A kind of no-cleaning liquid aluminum flux and preparation method thereof

A liquid aluminum and flux technology, used in welding equipment, welding media, manufacturing tools, etc., can solve the problems of large residual corrosion in welding, insufficient welding activity, and small amount of tin hanging, so as to achieve less residue, good solderability, High welding efficiency

Active Publication Date: 2014-10-08
青岛英太克锡业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The inventor provides a no-cleaning liquid aluminum flux, which solves the problems of less hanging tin, exposed aluminum on the tin surface, insufficient soldering activity, and large soldering residual corrosion.

Method used

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  • A kind of no-cleaning liquid aluminum flux and preparation method thereof
  • A kind of no-cleaning liquid aluminum flux and preparation method thereof

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preparation example Construction

[0029] The preparation method of described hydroxylamine fluoride, comprises the following steps:

[0030] 1) In terms of weight percentage, take 1-5% of ethylenediamine, 3-30% of ethanolamine, 20-90% of diethanolamine and 5-80% of triethanolamine, and mix them uniformly to obtain a mixture;

[0031] 2) The resulting mixture is neutralized to a pH value of 6.5-8 with hydrofluoric acid;

[0032] 3) Evaporate the above neutralized product at a temperature of 140-160° C. for 3.5-4.5 hours.

[0033] The metal active salt is one or more of tin fluoride, stannous fluoride, stannous fluoroborate, stannous chloride, zinc fluoride, zinc fluoroborate, zinc chloride and bismuth chloride combination.

[0034] The activator is one or a combination of diethylamine hydrochloride, triethylamine hydrochloride, lithium fluoride, sodium fluoride, magnesium fluoride and aluminum fluoride.

[0035] The solvent is one or a combination of water, ethanol, isopropanol, ethylene glycol, and propylen...

Embodiment 1

[0046] The preparation method of hydroxylamine fluoride, it may further comprise the steps:

[0047] 1) According to weight percentage, take ethylenediamine 1%, ethanolamine 30%, diethanolamine 64% and triethanolamine 5%, mix and stir evenly to obtain a mixture;

[0048] 2) the resulting mixture is neutralized to a pH value of 6.5 with hydrofluoric acid;

[0049] 3) Evaporate the neutralized product above for 4.5 hours at a temperature of 140° C. to remove moisture therein and prevent subsequent welding spatter.

Embodiment 2

[0051] The preparation method of hydroxylamine fluoride, it may further comprise the steps:

[0052] 1) Take 5% of ethylenediamine, 3% of ethanolamine, 84% of diethanolamine and 8% of triethanolamine according to weight percentage, mix and stir evenly to obtain a mixture;

[0053] 2) the resulting mixture is neutralized to a pH value of 7 with hydrofluoric acid;

[0054] 3) Evaporate the neutralized product above for 3.5 hours at a temperature of 160° C. to remove moisture therein and prevent subsequent welding spatter.

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Abstract

The invention relates to a no-cleaning liquid aluminum flux and a preparation method of the no-cleaning liquid aluminum flux. The preparation method comprises steps of: 1) weighing 60 to 85% of fluorate hydroxylamine, 5 to 30% of metal active salt, 1 to 5% of active agent, and 0.1 to 5% of corrosion inhibitor by weight, and uniformly mixing to obtain an active object for later use; 2) weighting 15 to 30% of active substance, and 70 to 85% of solvent by weight for later use; 3) mixing the weighed solvent and active substance along with continuous agitating, then heating to 50 to 60 DEG C, agitating for 8 to 12 minutes, and then transferring into a sealed plastic container for storing, so as to obtain no-cleaning liquid aluminum flux. The no-cleaning liquid aluminum flux provided by the invention is high in weldability and welding efficiency; less splash is generated during welding, and the welding is nearly free of splashing, so that the welding flux can be saved; and fewer residues are generated after welding, and the welding spots do not need to be cleaned, so that long service life can be ensured.

Description

technical field [0001] The invention relates to a flux, in particular to a no-cleaning liquid aluminum flux for aluminum soft soldering products in the electronic industry field and a preparation method thereof. Background technique [0002] At present, the rapid development of the electronic and electrical industry has put forward higher requirements for the matching soldering materials. At the same time, the importance of human health has been paid more and more attention to. A series of measures are used to improve the earth's environment on which human beings depend. The United Nations Environmental Protection Agency has also proposed a deadline to change substances harmful to the atmospheric environment. However, due to the high reliability requirements of some products in the electronic and electrical industry, the existing fluxes must be cleaned after welding to ensure the performance of the products due to performance reasons. Most of the cleaning agents used now are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/363
Inventor 刘海涛
Owner 青岛英太克锡业科技有限公司
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