ISSN: 0149-6123
CODEN: CCAGPD
Page Count: 4

The Inhibition of Chloride-Induced Corrosion in Reinforced Concrete by Calcium Nitrite
Rosenberg, AM
Research associate and research manager, W. R. Grace & Co., MD

Gaidis, JM
Research associate and research manager, W. R. Grace & Co., MD

Abstract

Reinforcing steel in portland cement concrete is subject to accelerated corrosion in the presence of chloride ions. A corrosion-inhibiting admixture based on calcium nitrite has been shown to confer protection (that is, to inhibit corrosion) if the chloride to nitrite weight ratio (Cl⁻/NO2−) does not exceed 1.5. Visual observations made on rebars in limewater solutions containing chloride and nitrite ions, current and potential measurements on concrete cylinders with embedded reinforcing bars (rebars), and potential measurements on simulated concrete bridge decks were in substantial agreement.

Keywords:
corrosion, chlorides, reinforcing steel, admixtures, concretes, inhibitor, portland cement, calcium nitrites

Paper ID: CCA10394J
DOI: 10.1520/CCA10394J
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