the application of a thin layer of soft solder to the ends of wires before soldering them
<noun.act> careful tinning of the ends of wires results in a better joint when you solder them
the application of a protective layer of tin
<noun.act>
Tin \Tin\, v. t. [imp. & p. p. {Tinned}; p. pr. & vb. n. {Tinning}.] To cover with tin or tinned iron, or to overlay with tin foil.
Tinning \Tin"ning\, n. 1. The act, art, or process of covering or coating anything with melted tin, or with tin foil, as kitchen utensils, locks, and the like.
2. The covering or lining of tin thus put on.
Wean, a maker of steel-processing equipment, was the original designer and builder of the No. 5 electrolytic tinning line at the plant.