Corrosion of reinforcing steel in concrete can be a major problem. Epoxy-coated or galvanized reinforcing bars have both been used to combat this problem, which can also be solved by using stainless steel.


Stainless steel is an alloy of iron to which a minimum of 12 percent chromium has been added. A very thin, chromium-rich oxide film forms on the steel surface making the metal chemically inactive and resistant to corrosion. The major disadvantage to stainless steel is that it costs from three to six times more than conventional reinforcing steel.