CorrVerter® MCI® Rust Primer: The Clear Winner Against Rebar Corrosion in Concrete Repairs



Corroded reinforcement is the chief cause of concrete deterioration, which prompts subsequent repairs. For repairs to be sound, contractors must ensure adequate adhesion of new patch repair materials by proper preparation of exposed reinforcing steel. ICRI’s 310.1R-2008 “Guide for Surface Preparation for Repair of Deteriorated Concrete Resulting from Reinforcing Steel Corrosion” states that exposed reinforcing steel should be free of any materials such as concrete, dirt, and corrosion products that could interfere with repair material adhesion, although a tightly bonded light rust on the rebar surface is usually not detrimental to the bond of patch materials. When it comes to tackling reinforcement surface prep and ongoing protection, CorrVerter® MCI® Rust Primer stands out among competitor materials with clear performance and application advantages to mitigate rebar corrosion.

Rebar coatings containing corrosion inhibitor typically require a rust-free application surface to work properly. Abrasive or water blasting and intensive labor are usually needed to ensure corroded surfaces are completely clean. This is not necessary for CorrVerter® MCI®, which is recommended for application to rusty or poorly prepared steel surfaces where further corrosion protection is required and good surface preparation is difficult to achieve. It is a unique formulation of chelating agents combined with a high solids waterborne latex with extremely low water vapor permeability. This fast drying, single-component primer converts surface rust into a hydrophobic passive layer and offers excellent protection against re-rusting of metal surfaces. Reinforcement coated with CorrVerter® MCI® Rust Primer has similar bond strength to concrete compared with uncoated rebar.

CorrVerter® MCI® Rust Primer data reports 500 hours of corrosion resistance in salt spray testing (ASTM B-117) at only 75-125 µm) DFT (applied at 217.5-362.5 µm WFT).

When it comes to dependable corrosion protection and easy surface prep, CorrVerter® MCI® Primer is the clear winner among competitive rebar primers and bonding agents. CorrVerter® MCI® Primer offers engineers, owners, contractors, DOTs, and government agencies a convenient, low-labor option when performing repairs on heavily corroded rebar and other metal surfaces.

Source: Cortec® Corporation

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