Liquid soldering flux for soldering electrical products

Abstract

The invention discloses a liquid soldering flux for soldering electrical products, which is characterized by being prepared from the following raw materials in percentage by weight: 70-85 percent of ethanol, 2.0-5.0 percent of ethylene glycol monobutyl ether, 1.0-4.0 percent of mixed acid with the volume ratio of hydrochloric acid to phosphoric acid of 2:1, 10-20 percent of colophony, 0.5-2.0 percent of benzotriazole and 0.5-3.0 percent of glycerol stearate. The liquid soldering flux for soldering the electrical products is prepared by the following steps of: respectively placing the components in a container for sufficiently mixing, heating in a water bath for 3h, keeping a temperature of 40-50 DEG C, and stirring and mixing to be uniform while heating; and naturally cooling to the room temperature. The liquid soldering flux is coated on an electric appliance wiring terminal so that a soldering surface is rapidly activated, a copper conductor is soldered on an activated surface of a large electric appliance wiring terminal by an electric soldering iron through soldering tin, thus a firm, smooth and bright soldered dot can be obtained, and the oxidation of the surface of the electric appliance wiring terminal is avoided. The soldered dot can keep firm, smooth and bright for a long time, and the quality of an electric appliance wiring product is ensured.

Description

technical field [0001] The invention belongs to the field of welding, in particular to a liquid flux suitable for welding wires of electrical products in railway engineering construction. Background technique [0002] For a long time, in the construction of railway engineering, it is necessary to weld copper wires to the terminals of large electrical wiring. When welding wires for electrical products, a lot of work is to use electric soldering iron to solder copper wires to the terminals of large electrical wiring. This work requires the operator to complete the welding quickly, and at the same time requires that the solder joints be firm and have anti-oxidation properties. sex. In order to ensure the speed of the welding wire, commercially available solder paste is often used in the operation, but the disadvantage of using solder paste is that after the completion of the welding wire, after a period of time, the solder joints and around the solder joints often have serious...

AI Technical Summary

Problems solved by technology

In order to ensure the speed of the welding wire, commercially available solder paste is often used in the operation, but the disadvantage of using solder paste is that after the completion of the welding wire, after a period of time, the solder joints and around the solder joints often have serious oxidation. point loose, resulting in a serious decline in the quality of electrical products, and even lead to the scrapping of electrical products