Coating the base metal in the joint by dipping, electroplating, or other applicable means prior to soldering or brazing.
The term tinning is popularly used for the term pre-coating. Tinning is most commonly used to describe the process of coating a metal with tin (although other metals such as lead may be used instead of tin) or a tin alloy (e.g., solder). In brazing, a thin layer of fluxed filler metal is spread ahead of the main deposit to form a coating which provides a strong bond between base metal and bronze.