Soldering flux for tin wire capable of welding stainless steel and preparation method of soldering flux

By using flux containing metal salt active agents and other components in stainless steel soldering technology, problems such as unstable flux performance and easy loss of activity in the prior art are solved, efficient welding effect and stable performance are achieved, and the production process needs of flux core solder wire are met.

CN119703492APending Publication Date: 2025-03-28YUNNAN TIN IND TIN MATERIAL CO LTD
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Patent Information

Application Number
CN202510001739.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-02
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The existing stainless steel soldering technology has problems such as unstable flux performance, easy loss of activity, strong corrosiveness, long-term preparation and difficult to meet the production process requirements of flux-core solder wires.

Method used

A flux containing metal salt active agent, corrosion inhibitor, antioxidant, defoaming agent, dilute hydrochloric acid and film forming agent is used to remove the oxide film on the surface of stainless steel through the metal salt active agent to form a viscous liquid protective surface, reduce surface tension, and promote solder wetting and spreading.

Benefits of technology

The flux is wetting and spreading on the surface of stainless steel, with excellent welding effect, stable performance, low corrosion, and simple and fast preparation method to meet the production needs of flux-core solder wire.

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Abstract

The invention discloses a soldering flux for a tin wire capable of welding stainless steel and a preparation method of the soldering flux, and the soldering flux comprises the following components in percentage by weight: 10.0%-22.0% of a metal salt active agent, 1.0%-5.0% of a film-forming agent, 0.1%-1.0% of a corrosion inhibitor, 0.3%-2.0% of an antioxidant, 0.05%-1.0% of diluted hydrochloric acid, 3.0%-10.0% of a solvent, 0.02%-0.5% of a defoaming agent and the balance of rosin. The scaling powder can fully wet the surface of a stainless steel weldment, the welding effect is excellent, the problems that the scaling powder is unstable in performance, welding activity is prone to losing, corrosivity is high, and preparation time is long are effectively solved, and the production process requirements of flux-cored solder wires can be met.
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