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Solder Fluxes
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Introduction
Untitled Document
| What is Flux?
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| A flux is a chemical composition critical to the heat joining methods
of soldering, brazing and welding. |
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What a Flux does?
1. Chemically: - Cleans metal surfaces to assist the flow of filler
metals over base metals.
- Provides a protective barrier against re-oxidation and heat
scale.
2. Thermally: Assists with heat transfer from heat source to metal surface.
3. Physically: Helps in the removal of surface metal oxides.
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Heat joining Methods & Processes - Definitions
1.Soldering:
Joining of similar or disimilar metals using an alloy that typically includes
a base of tin combined with lead, silver,antimony, bismuth, and indium.
Soldering processes cover a temperature range of 60°C to 400°C, in the
electronics, plumbing, food industry, electrical wiring, and automotive
applications.
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2. Brazing:
Joining of similar or disimilar metals using an alloy that typically includes
a base of silver combined with nickel, copper, and zinc. High temperature
brazing, generally used for carbide products, uses alloys that contain no
silver but use nickel, copper and manganese. Brazing covers a temperature range
of 470°C to 1190°C. Used for compressors, engine circulation tubes, mining tools,
plumbing fixtures, jewelry, and musical instruments.
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3. Welding:
Joining of similar metals using a direct heat source to melt the base metal
and a filter metal to create a uniform finished product. Most welding involves
iron-based metals such as steel and stainless steel. Welding covers a temperature range
of 800°C to 1635°C. Used for forge and farrier applications, oil pipelines
and blacksmithing.
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