In Action

Salt bath dip brazing is the process of joining aluminium components.  In simple terms, mating parts are held together by jigs or mechanical joints.  The mating surfaces are coated in an aluminium paste or an aluminium foil shim is inserted. 

The assembly is then pre-heated in an oven at over 500 degrees centigrade and then immersed into a tank of molten salt.  The salt is at a temperature a few degrees lower than the melting point of the aluminium components, but high enough to melt the brazing paste or foil, thus fusing the parts together. 

Once the assembly is removed from the salt bath the components are cooled and thoroughly  cleaned to remove any salt residue.’ 

RHH Franks are one of the only Nadcap-accredited dip brazing contractors in the UK and Europe, serving the aviation industry.