Self-separation fluxing agent of hot tinning and tin alloy and preparation method thereof

A technology of tin alloy and hot-dip tin, which is applied in metal processing equipment, manufacturing tools, welding equipment, etc., can solve the problems of reducing flux activity and failing to obtain melting point solid flux, and achieve the effect of ensuring firmness

Active Publication Date: 2013-07-03
烟台博瑞锡业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual use, in order to be suitable for filling solder wire flux cores, inactive resins or high-carbon polyalcohols are added to it. Even so, it can only be made i

Method used

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  • Self-separation fluxing agent of hot tinning and tin alloy and preparation method thereof
  • Self-separation fluxing agent of hot tinning and tin alloy and preparation method thereof
  • Self-separation fluxing agent of hot tinning and tin alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A self-separating flux for hot-dipping tin and tin alloys, its raw material composition and weight are respectively

[0034]

[0035] The preparation method steps of the self-desorption flux of above-mentioned hot-dip tin and tin alloy are:

[0036] (1) Preparation of hydrofluoric acid salts of polyhydroxyethylamine and polyhydroxymethylamine:

[0037] a. In this embodiment, polyhydroxyethylamine is composed of diethanolamine and hydroxyethylethylenediamine, and polyhydroxymethylamine is composed of trishydroxymethylaminomethane. The above-mentioned diethanolamine, hydroxyethylethylenediamine and Trishydroxymethylaminomethane is mixed in equal proportions (weight ratio) and placed in an evaporating pot with a corrosion-resistant coating, dissolved in water, and the weight ratio of the mixture of polyhydroxyethylamine and polyhydroxymethylamine to water is 1: 2. Heat to 120°C while stirring, and the aqueous solution in the evaporator boils slightly;

[0038] b. Add ...

Embodiment 2

[0043] A self-separating flux for hot-dipping tin and tin alloys, its raw material composition and weight are respectively

[0044]

[0045] The preparation method steps of the self-desorption flux of above-mentioned hot-dip tin and tin alloy are:

[0046] (1) Preparation of hydrofluoric acid salt of Tris:

[0047] a. Put tris in an evaporating pot with a corrosion-resistant coating, add water to dissolve, the weight ratio of tris to water is 1:4, heat to 120°C while stirring, and the evaporating pot The inner aqueous solution boils slightly;

[0048] b. Add hydrofluoric acid aqueous solution with a mass fraction of 10% dropwise into the evaporator, keep the aqueous solution slightly boiling, adjust the pH value between 6 and 8, and stop heating;

[0049] c. put the material in the evaporating pot into a polypropylene container to cool, and wait until the material in the container is white waxy to obtain the hydrofluoric acid salt of tris;

[0050] (2) Heat the above tri...

Embodiment 3

[0053] A self-separating flux for hot-dipping tin and tin alloys, its raw material composition and weight are respectively

[0054]

[0055] The preparation method steps of the self-desorption flux of above-mentioned hot-dip tin and tin alloy are:

[0056] In this example, the polyhydroxyethylamine is composed of monoethanolamine and hydroxyethylethylenediamine, and monoethanolamine and hydroxyethylethylenediamine are mixed in a ratio of 1:3 (weight ratio) and placed on a corrosion-resistant coating. In the evaporating pot of the first layer, add water to dissolve, the weight ratio of polyhydroxyethylamine to water is 1:3, heat to 120°C while stirring, and the aqueous solution in the evaporating pot boils slightly;

[0057] b. Add hydrofluoric acid aqueous solution with a mass fraction of 10% dropwise into the evaporator, keep the aqueous solution slightly boiling, adjust the pH value between 6 and 8, and stop heating;

[0058] c. put the material in the evaporator into a ...

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Abstract

The invention relates to a self-separation fluxing agent of hot tinning and a tin alloy and a preparation method thereof. The self-separation fluxing agent comprises the following raw materials by weight percentage of 10-15% of a heavy metal fluoride active agent, 80-87% of polyhydroxy ethylene diamine and 3-5% of an alcohol solvent. According to the self-separation fluxing agent provided by the invention, the borofluoride with poor activity is abandoned and a perfluorinated compound with higher activity as an active agent is adopted, meanwhile, the hydrofluoride of polyhydroxy methyl organic amine with the high activity is utilized as a matrix in a matching manner so as to enable the perfluorinated compound to be fully dissolved, the matrix has a carrier action, and a scaling powder does not fully contain an inactive filling.

Description

technical field [0001] The invention belongs to the field of metallurgy and chemical industry, and relates to soldering, in particular to a self-degrading flux for hot-dipping tin and tin alloys and a preparation method thereof. Background technique [0002] Brazing is a common method of connecting aluminum-aluminum and aluminum-copper in electronic technology. It is usually divided into two types: hard brazing and soft brazing: with the brazing temperature of 450°C as the boundary, the process higher than this temperature It is called brazing, and lower than this temperature is called soft soldering. Among them, brazing has great limitations in the connection process of some electronic and electrical products due to the high process temperature; soft soldering The brazing temperature is low, and the heat effect of the brazing process on the product is small. Soldering iron brazing in soft soldering is the most commonly used operation process due to its flexible and conveni...

Claims

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Application Information

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IPC IPC(8): B23K35/363
Inventor 张启云庄洪涛丁清峰
Owner 烟台博瑞锡业科技有限公司
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