What is the potential impact of using improper flux?

Using improper flux can lead to contamination of the brazed joint, which can significantly compromise the overall integrity of the joint. Flux plays a crucial role in the brazing process by preventing oxidation and assisting in the flow of the filler metal. If the flux is not suitable for the materials being joined or does not have the correct properties, it may not effectively protect the base metals from contamination due to oxidation or other environmental factors.

Contamination can result in poor adhesion between the filler metal and the base metals, leading to weak joints that may fail under stress or operational conditions. Additionally, improper flux can leave residues that may corrode over time, further degrading the joint. Therefore, selecting the appropriate flux is vital for ensuring a clean and strong brazed joint, ultimately safeguarding the strength and durability of the assembly.