Q
what is the purpose of flux coating
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The purpose of the flux coating on welding rods is multifaceted; primarily, it acts as a protective barrier against atmospheric contamination. When welding metals, the high temperatures can make the metal susceptible to oxidation and other forms of contamination from the air. The flux coating decomposes into gases that shield the weld pool from the surrounding environment. Additionally, the flux helps in cleaning the metal surfaces, removing oxides and impurities which could lead to weak welds. It also contains metal additives to improve the welding properties and facilitate the formation of slag, a layer on top of the weld that traps contaminants and can easily be removed after cooling. The flux coating, therefore, plays a crucial role in ensuring strong, clean, and defect-free welds.
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