Use of stainless steel rebar for concrete reinforcement is increasing
worldwide. The enhanced properties of stainless steel prove to be a
viable solution when life cycle costs of the structures are taken into
account. Austenitic and duplex stainless steels are used as rebar
because they present an excellent combination of corrosion resistance
in concrete, high strength and good ductility.
The resistance to pitting corrosion of various stainless steels has
been evaluated by electrochemical tests. Thus, it is possible to
select the appropriate grade according to the environment the concrete
structure is submitted to during its life. A classification of the
selected austenitic and duplex grades is introduced.