Galvanized Pipe
Steel pipes are galvanized when they are dipped into molten zinc. This zinc coating helps prevent rust. However, after decades of use, corrosion and rust build up on the inside of these pipes, which can cause problems. ... If the surface of the pipe is the color of a penny, then the pipe is probably made from copper.
Galvanized steel can be made into a strong plumbing or tubing material -- one that resists corrosion from exposure to water or the elements. It has been used used for water-supply pipes or as a strong tubing for outdoor applications.
Galvanized pipe has been coated with a layer of zinc. The zinc provides a barrier against corrosion so that the pipe may be exposed to the outdoor environmental elements. The protective barrier proves equally effective against damage from indoor humidity.
Where It's Used
This type of pipe is used in a variety of settings. Prior to 1970, galvanized steel was utilized for water-supply pipes in construction. It is used in outdoor applications wherever the strength of steel is desired, such as fence posts and rails, scaffolding and as protective railings.
