Signifi cant deterioration of concrete structures can be attributed to corrosion of reinforcement. Large portions of Highway Department budgets are directly or indirectly spent on the evaluation, repair, or replacement of concrete elements. This is especially true in marine environments or regions where de- icing salts are used on roadways. Several methods are currently employed to reduce corrosion activity and/or increase the time to corrosion. Methods tend to focus on either reducing the transport mechanisms through the concrete (usually through decreased concrete permeability or membrane application), or directly interfering with the corrosion process (corrosion inhibitors). Specifi cally, concrete cover can be increased, lower water to cementitious material ratios (w/c) can be used (including the use of pozzolonic materials), overlays can be used, reinforcement can be coated or made of materials less susceptible to corrosion (stainless steel, microcomposite steel, or fi ber reinforced polymers), corrosion inhibiting admixtures can be included, or structures can include cathodic protection systems. Typically a combination of several of these methods is employed in severe corrosive environments. And yet corrosion problems are still common (Figure 1). Engineers now have a new tool for reducing corrosion in structures, with some unique advantages over other methods.