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The effectiveness of organic commercial migrating inhibitors on steel reinforcements corrosion. Four series of concrete specimens were cast. Two organic migrating inhibitors were applied. Free corrosion potential and corrosion rate of steel rebar were periodically monitored for five years. Results show that migrating inhibitors are not effective in reducing corrosion rate.
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Corrosion inhibiting admixtures has been initially used as concrete additives to inhibit chloride induced corrosion of rebars in the late 1970`s. The first chemistry introduced to the market was based on Calcium Nitrite chemical composition, which in performance is classified as anodic inhibitor, protecting the anode site of the corrosion cell. Calcium Nitrite inhibitor`s mechanism of protection depends on the interference with the chloride complexing process by oxidizing the more easily attacked Fe2+ form of iron to the more stable Fe3+ form.
This paper considers the parameters that affect chloride induced corrosion in reinforced concrete structures and the effect of. variance in some of the parameters that influence the initiation period of chloride induced corrosion in reinforced concrete structures, on the service life estimates.