Ammonium fluoroborate is widely used in metal surface treatment processes, particularly for aluminum and its alloys. It serves as a key component in fluxing agents during soldering and brazing operations, ensuring clean and strong joints by removing oxides from metal surfaces. In the electronics industry, it is employed as an etching agent for silicon wafers, aiding in the precise fabrication of semiconductor devices. Additionally, it finds application in the production of abrasives and grinding wheels, where it enhances the durability and performance of these materials. Its use in flame retardants also contributes to improving the fire resistance of various materials, including textiles and plastics.