What effect does proper cleaning have on the brazed joint?

Proper cleaning plays a critical role in the brazing process, as it directly affects the strength and integrity of the joint. When surfaces are thoroughly cleaned, contaminants such as oils, dirt, oxidation, or other residues are removed, allowing for better metallurgical bonding between the base metals and the filler material. This bond is essential for achieving a strong and durable joint.

When the surfaces of the materials being joined are clean, the brazing filler metal can flow more freely into the joint, leading to a comprehensive fill and improved mechanical properties. Consequently, the joint experiences enhanced strength, ductility, and resistance to thermal fatigue. Therefore, effective cleaning is a fundamental step that maximizes the performance and longevity of the brazed joint, highlighting its importance in the overall brazing process.