Performance of Corrosion Prevention Methods – 18 Year Study

Over the last 30 years a variety of approaches have been taken to delay the start of corrosion of reinforcement in concrete. While short term and accelerated performance data is readily available in the literature, it is difficult to find long term laboratory data performed under control conditions. This report intends on filling that gap in the knowledge base of the performance of the various products evaluated.

The long term laboratory performance of specimens with 1.75 inch cover in 3 w% NaCl at 72° F and 64% humidity is presented. Specimens were made with corrosion inhibitors, penetrant sealers, epoxy coated rebar, galvanized rebar, and supplementary cementitious materials of various types and quantities.