the following are the effective ways of preventing corrosion, except;

A. Use a coating or barrier product such as grease,oil,paint or carbon fiber coating.

B. Keep air and moisture away from the metal by covering the metal. This is done by painting, plastic coating,greasing,chromium plating,zinc plating or galvanizing and tin plating

C. Fix small pieces of a more reactive metal to it's surface

D. Expose the metals to air and adicic substance ​