Corrosion inhibitor protects post-tensioned structures

Cortec® Corp. has introduced MCI®-309, a vapor-phase corrosion inhibitor (VpCI®) powder for corrosion protection of ferrous metals and aluminum in recessed areas, interior cavities, and voids. The mixed inhibitor vaporizes and adsorbs on the metal surfaces, reaching all exposed areas. It protects both the cathodic and anodic sites of metal.

The product creates a monomolecular inhibiting layer and enables up to 24 months of continuous protection. Protected surfaces do not have to be cleaned before concrete or grout placement, such as in rebar applications. If the inhibitor layer is disturbed by moisture or by opening the enclosed space, the layer is replenished by continuous vapor redeposition.

Applications include segmental concrete bridge tendons; post-tensioned box girder bridges; tubular structures, pipes, and vessels; equipment protection after hydrostatic testing; parts, components, and completed assemblies during shipping and storage; and prestressed tendons.