Mitigating corrosion of embedded rebar is a perennial problem for reinforced concrete structures, requiring preventative maintenance and repair. Topical corrosion inhibiting treatments require a clean, properly prepared surface area to work as intended, however according to the company, Cortec’s new MCI®-2020 Gel is designed to work when proper surface preparation cannot be achieved, or is economically undesirable, by delivering its “Migrating Corrosion Inhibitor” technology directly to the depth of reinforcement. 

The gel is an injectable corrosion inh ibitor that provides a robust dose of corrosion protection directly where it is most needed. Once inside the concrete, the inhibitor can also move laterally through the concrete along the embedded reinforcement via liquid and vapour diffusion.  The corrosion inhibitor molecules deposit on metal surfaces, forming a molecular layer that acts as a barrier to corrosive elements such as chlorides and from carbonation.

It is considered a mixed inhibitor that protects against corrosion at both the anodic and cathodic areas of a corrosion cell. Unlike some of its competitors, it does not contain secondary amines or nitrites, which together can form carcinogenic nitrosamines.  It is also non-flammable and non-combustible, and can be used in almost any concrete repair or maintenance application, concluded the company.