Galvanized steel pipes are used typically in plumbing applications where the metal is exposed constantly to moisture. To galvanize a steel pipe is to treat it with a special zinc-oxide coating to prevent oxidation and limit the damage to the pipe created by other corrosive elements. Cleaning galvanized pipe will extend the life of the zinc-oxide coating.
Mix in a bucket 1 gallon of hot water, 1/4 cup dish soap and 1 cup vinegar.
Dip a soft brush in the soap solution and scrub the pipe using small circular rotations.
Rinse the pipe off with warm water and then wipe dry.
Use a lint-free rag to apply metal polish with small circular rotations.
Allow the metal polish to dry and then wipe clean.