What is the primary function of braze welding?

Braise welding is a process that joins metals together by using a filler metal that has a lower melting point than that of the base metals. The primary function of braze welding is to join similar or dissimilar metals without melting them. This is achieved by heating the workpieces to a temperature that allows the filler metal to flow between them in a molten state, but the base materials remain solid.

This capability is particularly beneficial since it allows for the joining of different types of metals that have varying melting points and thermal properties. For instance, braze welding can effectively bond metals like aluminum to steel, which would not be possible with traditional fusion welding methods that require melting the base materials.

In contrast, the other options highlight processes not aligned with the fundamental purpose of braze welding, such as coating metals for corrosion resistance or focusing solely on strengthening metallic structures through mechanisms that involve melting the base materials.