flux

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 ...

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.