Dip brazing

Dip brazing is accomplished by immersing clean and assembled parts into a molten bath contained in a suitable pot. Dip brazing is classified into chemical bath dip brazing and molten metal bath dip brazing. In chemical bath dip brazing the filler metal, in a suitable form, is preplaced and the assembly is dipped in a bath of molten salt, as shown in Figure 4.4.3. The salt bath provides the required heat and necessary protection from oxidation. The salt bath is contained in a suitable pot, also called the furnace, which is heated by electrical resistance. In molten bath dip brazing the parts are immersed in a bath of molten brazing filler metal contained in a furnace. The molten brazing metal flows into the joint by capillary action.

Dip brazing is preferred for brazing small to medium sized parts with multiple or hidden joints. It is also useful to braze parts of irregular shapes. This process is best suited for moderate to high production runs.