What is the purpose of post-brazing cleaning?

Post-brazing cleaning is essential primarily to remove residual flux and prevent corrosion. When brazing occurs, flux is applied to the surfaces being joined to help promote wetting of the filler material and to protect the base metals from oxidation during the heating process. However, after the brazing is completed, any remaining flux can be corrosive, which can lead to deterioration of the joint over time. Cleaning ensures that these residues are eliminated, thus safeguarding the integrity and longevity of the brazed joint. Furthermore, by preventing corrosion, the mechanical properties of the joint are preserved, ensuring its reliable performance in applications where it is used. This aspect of post-brazing cleaning is critical as it directly impacts the durability and functional quality of the completed work.