White flux is a term commonly used in the field of metallurgy and welding, referring to a particular type of flux compound. Flux is a substance that is typically applied to a metal surface before soldering, brazing, or welding. Its primary purpose is to remove oxides, dirt, and other impurities from the metal, allowing for better bonding and the creation of strong, durable joints.
White flux, also known as silver brazing flux, is specifically designed for high-temperature applications, particularly when silver-based alloys are used. It consists of a mixture of various components, such as borax, potassium or sodium borate, ammonium chloride, and sometimes fluorides. When heated, white flux reacts with the metal surface, forming a protective coating that prevents oxidation and facilitates the flow and adhesion of the melted filler material.
The term "white flux" can also be used more broadly to describe any soldering or brazing flux that appears white or pale colored, regardless of its specific composition. However, silver brazing flux is most commonly associated with this term due to its widespread use and effectiveness in joining many different types of metals, including brass, bronze, copper, and steel.
Overall, white flux serves as a crucial component in the process of achieving strong and reliable bonds between metals in various industrial applications, ensuring the integrity and longevity of the resulting joints.
