Question

soldering and welding - dentistry

Answer 1

Soldering is distinguished from welding by the use of a third body, the solder, between the two workpieces, but without melting either of them. The conditions for effective joins of these types are discussed.

Unfortunately, metals may oxidize sufficiently to interfere with wetting by the solder, whether this is because the metal is prone to corrosion or naturally-coated by a passivating oxide layer. The use of fluxes is therefore necessary to obtain a good joint. The chemistry of these is discussed, and the means of limiting their influence.