XINXIN QJ201 brazing flux

XINXIN QJ201 brazing flux is an aluminum-fluoride-based flux (mainly KAlF₄)

designed for non-corrosive, high-temperature brazing of aluminum and aluminum alloys.  

Its principal uses are:

     1. Oxide Removal & Wetting Aid – Chemically dissolves the tenacious Al₂O₃ film that forms on aluminum surfaces, allowing the filler alloy to wet and flow freely at 560–585 °C . 

     2. Oxidation Protection – Forms a thin molten layer that shields the joint from re-oxidation during heating, ensuring sound metallurgical bonding . 

     3. Process Versatility – Compatible with flame, furnace, induction, and automatic dispenser systems; supplied as a dry powder that can be brushed, dipped, or sprayed (after suspension in alcohol or water) . 

     4. Post-Braze Cleanliness – Leaves minimal, largely water-soluble residue, so components used in HVAC, automotive coolers, and electrical enclosures require only simple hot-water rinsing . 

     5. Industry Applications– Routinely used when brazing aluminum evaporators/condensers, intercoolers, battery cooling plates, and lightweight structural parts where corrosion resistance and joint integrity are critical .In short, QJ201 flux enables reliable, oxide-free, cosmetically clean joints in aluminum assemblies across automotive, refrigeration, and electronics industries.