Aluminum dip brazing is an excellent process for producing high quality, strong, smooth braze joints in complicated or uncomplicated assemblies. Aluminum dip brazing uses molten chloride base salts containing fluorides to act as a fluxing agent as well as a heating media. Prior to dipping the assemblies in the molten salt bath, the details are thoroughly cleaned and assembled with the aid of tack welds or staking. Then, braze filler metals are applied and preheated to a temperature slightly below the bath temperature.
After dipping, the assemblies are quenched or air cooled depending on mass, configuration and the ultimate physical property requirements. Thorough cleaning is then done to remove all of the salts. If appropriate, the assemblies are then aged to the required condition.
Industry standards for hydrogen brazing include:
- Mil-B-007883C, Type V
- AWS 3.7: 1999
- AMS 2673D
