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Low-corrosivity soldering flux

A flux and corrosive technology, applied in the field of low corrosive flux, can solve the problems of affecting the welding quality and the high corrosiveness of the welded material, and achieve the effect of improving the welding effect, reducing the corrosiveness and reducing the acidity

Inactive Publication Date: 2019-12-03
JIESHOU HUAYU POWER SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This low-rosin no-cleaning flux has strong fluxing ability, good foaming performance, and does not contain halogen, but it contains organic acid activators, which are highly corrosive to the materials to be welded and affect welding quality.

Method used

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  • Low-corrosivity soldering flux

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A low-corrosion soldering flux, made of the following raw materials by weight: 35 parts of modified rosin, 7 parts of activator, 4 parts of thixotropic agent, 0.8 part of surfactant, 1.2 parts of other additives, 30 parts of solvent;

[0044] The flux is made by the following steps:

[0045] Step S1, adding modified rosin to the solvent, heating to 100°C and stirring evenly to fully dissolve the modified rosin to obtain a premix;

[0046] Step S2, keep the temperature constant, add the activator to the premix under constant stirring at 150r / min, and continue stirring for 15min after the addition;

[0047] Step S3, cooling the above mixture to 65°C, stirring at a constant speed of 150r / min, adding thixotropic agent, surfactant and other additives in turn, and continuing to stir for 15min after adding;

[0048] Step S4, stop heating, after the product is cooled down to room temperature, grind twice to prepare flux.

Embodiment 2

[0050] A low-corrosion soldering flux, made of the following raw materials by weight: 40 parts of modified rosin, 8 parts of activator, 4.5 parts of thixotropic agent, 0.9 part of surfactant, 1.3 parts of other additives, 35 parts of solvent;

[0051] The flux is made by the following steps:

[0052] Step S1, adding modified rosin to the solvent, heating to 100°C and stirring evenly to fully dissolve the modified rosin to obtain a premix;

[0053] Step S2, keep the temperature constant, add the activator to the premix under constant stirring at 150r / min, and continue stirring for 18min after the addition;

[0054] Step S3, cooling the above mixture to 65°C, stirring at a constant speed of 150r / min, adding thixotropic agent, surfactant and other additives in turn, and continuing to stir for 18min after the addition;

[0055] Step S4, stop heating, after the product is cooled down to room temperature, grind 3 times to prepare flux.

Embodiment 3

[0057] A low-corrosion soldering flux, made of the following raw materials in parts by weight: 45 parts of modified rosin, 9 parts of activator, 5 parts of thixotropic agent, 1 part of surfactant, 1.4 parts of other additives, 40 parts of solvent;

[0058] The flux is made by the following steps:

[0059] Step S1, adding modified rosin to the solvent, heating to 100°C and stirring evenly to fully dissolve the modified rosin to obtain a premix;

[0060] Step S2, keep the temperature constant, add the activator to the premix under constant stirring at 150r / min, and continue stirring for 20min after the addition;

[0061] Step S3, cooling the above mixture to 65°C, stirring at a constant speed of 150r / min, adding thixotropic agent, surfactant and other additives in turn, and continuing to stir for 20min after adding;

[0062] Step S4, stop heating, after the product is cooled down to room temperature, grind 3 times to prepare flux.

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Abstract

The invention discloses a low-corrosivity soldering flux which is prepared from the following raw materials in parts by weight: 35-45 parts of modified rosin, 7-9 parts of an activating agent, 4-5 parts of a thixotropic agent, 0.8-1 part of a surfactant, 1.2-1.4 parts of other additives and 30-40 parts of a solvent. According to the soldering flux, the modified rosin is adopted as a film forming matter of the soldering flux, the modified rosin has good film forming performance, -COOH with high reaction activity and high metal oxide removing capacity, an oxidation film on the surface of a welded matter can be removed together with an activating agent in the welding process, and the welding effect is enhanced; organic acid and triethanolamine are compounded to serve as an activating agent, so that the acidity of the whole soldering paste system is reduced (the corrosivity is reduced), the stability is enhanced, triethanolamine and organic acid can be decomposed from a neutral product inthe high-temperature welding process, the spreading performance of the soldering paste is improved, the welding spot spreading rate is increased, and then the welding effect is improved.

Description

technical field [0001] The invention belongs to the technical field of welding materials, in particular to a low-corrosion soldering flux. Background technique [0002] As a method of connecting various parts widely used in daily production, welding plays an extremely important role in production, and welding often uses solder to connect two parts. Therefore, the performance of the solder itself will It greatly determines the quality of welding performance. Flux is usually a mixture of rosin as the main component, which is an auxiliary material to ensure the smooth progress of the soldering process. Welding is the main process in electronic assembly. Flux is an auxiliary material used in welding. The main function of flux is to remove the oxides on the surface of the solder and the base material to be welded, so that the metal surface can reach the necessary cleanliness, which can ensure the solder joints Connect firmly. [0003] The Chinese invention patent with the pate...

Claims

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Application Information

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IPC IPC(8): B23K35/36B23K35/40
CPCB23K35/3612B23K35/40
Inventor 朱保义沈岑宽黄镔黄建新刘峰
Owner JIESHOU HUAYU POWER SUPPLY
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