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Chlorine free soldering flux and its application in bronze historical relics soldering repair

A chlorine flux and flux technology, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of long-term preservation of unfavorable cultural relics, false welding of brazing joints, poor spreading performance, etc., and achieve good spreading Performance, high joint strength, easy cleaning effect

Inactive Publication Date: 2007-05-30
SHANGHAI MUSEUM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The presence of chloride ions also causes bronze to form powdery corrosion, which will leave hidden dangers of corrosion to the ancient bronze cultural relics repaired by brazing, which is not conducive to the long-term preservation of cultural relics
In addition, the no-cleaning flux currently used in the electronics industry has no corrosion after brazing, but practice has proved that the flux and the solder have poor spreading performance during the restoration of bronze cultural relics, resulting in the formation of virtual joints in the brazed joints. Meet the strength requirements of the joint

Method used

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  • Chlorine free soldering flux and its application in bronze historical relics soldering repair
  • Chlorine free soldering flux and its application in bronze historical relics soldering repair
  • Chlorine free soldering flux and its application in bronze historical relics soldering repair

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Effect test

Embodiment 1

[0033] The preparation of embodiment 1 1# brazing flux

[0034] 1# brazing flux contains rosin, diethylamine and triethanolamine, wherein the content of each component by mass percentage is as follows: rosin 23%, diethylamine 4%, triethanolamine 1%, and the balance is alcohol. First, use a balance to weigh the alcohol according to the mass percentage and pour it into the beaker, then gradually add rosin, diethylamine, triethanolamine and other compounds into the alcohol according to the proportion, and stir slowly at the same time to allow them to fully mix. Flux is prepared.

Embodiment 2

[0035] The preparation of embodiment 2 2# brazing flux

[0036] A chlorine-free brazing flux of the present invention contains rosin, triethanolamine and salicylic acid, wherein the content of each component by mass percentage is as follows: rosin 28%, triethanolamine 1.2%, salicylic acid 2.5%, and the balance is alcohol . First, use a balance to weigh the alcohol according to the mass percentage and pour it into the beaker, then gradually add rosin, salicylic acid, triethanolamine and other compounds into the alcohol according to the proportion, and stir slowly at the same time to allow them to fully mix. Flux is prepared.

Embodiment 3

[0037] The preparation of embodiment 3 5# traditional zinc chloride brazing flux

[0038] 5# brazing flux is used for the traditional restoration of museums. In a reaction vessel, add 6.5g of zinc flakes, and then add 0.2mol 1mol / L hydrochloric acid. After the reaction is complete, a zinc chloride solution is generated. Flux is prepared.

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Abstract

This invention discloses a chlorineless soldering flux and its application, belonging to bronze cultural relics restoring realm, with its component in quantity being 8-40% rosin, 1-10% triethanolamine, 1-25% salicylic acid and alcohol as surplus. The chlorineless soldering flux matching Sn-Pb-Ag, has good malleability, is easy to wash off after welding, and solder joint has high intensity, little corrosivity to bronze material, which is quite applied in welding restore of bronze relics.

Description

technical field [0001] The invention belongs to the field of restoration of bronze cultural relics, and relates to a brazing flux. Furthermore, the invention relates to a chlorine-free brazing flux which can be used for brazing restoration of bronze cultural relics and its application in the restoration of bronze cultural relics. Background technique [0002] Flux is commonly known as flux in the application field. Its main function is to remove the oxide film on the surface of the brazing metal and liquid solder, protect the brazing metal and solder from further oxidation during the heating process, so as to improve the wettability of the solder to the metal surface of the body and promote the weld Formation. The melting point and minimum active temperature of the flux are slightly lower than the melting temperature of the solder. [0003] China invented bronze smelting technology very early, entered the heyday of bronze ware in the late Shang Dynasty and Zhou Dynasty, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/36B23K35/362B23K35/363B23K35/22
Inventor 张光敏周浩张佩琛张茗吴鲁海薛小怀
Owner SHANGHAI MUSEUM