flux

A flux and solvent technology, used in welding equipment, welding media, welding/cutting media/materials, etc., can solve problems such as corrosion of soldered parts, and achieve the advantages of improving weldability, inhibiting corrosion and improving corrosion resistance. Effect

Active Publication Date: 2018-11-02
SENJU METAL IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in fluxes to which water-soluble alcohol amines are added, there is a possibility that corrosion may occur in soldered parts, etc. due to moisture absorption of flux residues.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0038] The fluxes of Examples and Comparative Examples were prepared according to the compositions shown in Table 1 below, and evaluated for solderability and corrosion.

[0039] (1) Evaluation method

[0040] (a) Solderability

[0041] will have a diameter of A polyurethane-coated aluminum wire was wound around a Sn—Ni-plated Cu needle without removing the coating layer to prepare a test piece. This test piece was immersed in molten solder at 370° C. for 5 seconds to melt and remove the coating layer.

[0042] The flux was applied to the test piece from which the coating layer of the polyurethane-coated aluminum wire was removed. The tip of the test piece coated with flux is immersed in molten solder at 370°C for 3 seconds to volatilize the solvent component in the flux, and then the test piece is immersed in the solder melted at 370°C. The material is soldered for about 5 seconds to 10 seconds.

[0043] (b) Corrosive

[0044] Apply flux to the copper plate, and place ...

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PUM

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Abstract

Provided is a flux which is capable of improving dissolubility of a resin coating and inhibiting any corrosion. The flux is a liquid flux which is obtained by dissolving an amine compound, an activator and an acid into a solvent and contains 10 through 20 mass% of alkanolamine as the amine compound, 5 through 10 mass% of amine fluoride salt as the activator, 10 through 20 mass% of an organic acid which neutralizes the alkanolamine to form a water-insoluble salt as acid, and 50 through 75 mass% of the solvent.

Description

technical field [0001] The present invention relates to a flux used for soldering of a resin-coated wire in which a resin coating is removed by melting it with heat. Background technique [0002] Generally speaking, the flux used in soldering has the following functions: to remove the metal oxide existing on the surface of the solder and the metal to be soldered at the temperature at which the solder melts, and to make the metal at the junction of the two. Movement of elements becomes possible. [0003] In recent years, instead of wiring made of copper (Cu), wiring made of aluminum (Al) or an aluminum alloy has been proposed. For aluminum soldering, it is known that it is difficult to remove an oxide film formed on the surface of aluminum or an aluminum alloy, and a flux having a strong activating ability has been used conventionally. [0004] However, if the activation ability of the flux is too strong, it will corrode the metal of the joining object, such as aluminum or ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/363
CPCB23K35/025B23K35/26B23K35/3605B23K35/3613B23K35/362C22C13/00
Inventor 山崎裕之萩原崇史
Owner SENJU METAL IND CO LTD
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