How much SHS are you exposed to?

A tied rebar beam cage. This will be embedded inside of cast concrete to lend it strength. A bit of rust on the rebar actually increases the surface area and bonds well with concrete. The high pH level of the concrete will minimise further rust damage to the rebar. In cases where too much concrete poison is dissolving the cement stone of the concrete, the rebar is then also no longer protected and rust can be seen to creep through cracks in faulty concrete. This becomes particularly apparent in bridge structures, such as the Gardiner Expressway, and parking garages. Common countermeasures include epoxy coating of the rebar, keeping a slight electrical current running through the rebar and the choice of cement types that have greater sulphate resistance.