In silver brazing, what is typically the characteristic of a properly cleaned metal surface?

A properly cleaned metal surface in silver brazing should indeed appear shiny and reflective. This characteristic indicates that contaminants such as oils, dirt, and oxidation have been effectively removed, which is crucial for creating a strong bond during the brazing process. A clean surface allows the filler metal to flow properly and adhere to the base metals, ensuring a solid joint.

The shininess reflects the surface's purity, and it helps in the absorption of heat during the brazing operation, promoting an overall successful process. When the surface is shiny and reflective, this promotes better wetting of the filler metal, which is essential for achieving good capillary action and joint strength.

Other conditions like oxidation, rough textures, or discoloration would indicate inadequate cleaning. These factors can significantly hinder the brazing process by preventing proper adhesion and potentially leading to weak joints or failures. Thus, the shiny and reflective appearance of the cleaned metal is a key indicator of readiness for successful silver brazing.