What is a typical consequence of improper cleaning before brazing?

Improper cleaning before brazing can lead to a weakening of the joint due to the presence of contaminants such as dirt, oil, oxidation, or other foreign materials on the surfaces to be joined. When these impurities are left unaddressed, they can hinder the wetting and flow of the filler metal, preventing the formation of a strong bond between the base metals. A weak joint is likely to fail under stress, which is why proper cleaning is crucial for achieving the desired mechanical properties and strength in the brazed joint.

By ensuring surfaces are thoroughly cleaned prior to the brazing process, you promote excellent adhesion and the best possible connection. This is a fundamental principle in brazing, as the integrity of the joint relies heavily on the quality of both the base materials and the conditions under which they are joined.