What is the first step in preparing a brazed joint?

Cleaning the metal is the first crucial step in preparing a brazed joint because it ensures that any oxidation, contaminants, or surface irregularities that could hinder the bonding process are removed. The quality of the joint relies heavily on the cleanliness of the surfaces being joined. If the metal surfaces are not clean, it can result in weak joints or even complete failure of the bond, as impurities can prevent the filler metal from properly wetting and adhering to the base metals during the brazing process.

Once the metal is clean, subsequent steps like applying flux and heat can be effectively executed, leading to a strong and reliable brazed joint.