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03287 INHIBITING CHLORIDE INDUCED CORROSION OF CONCRETE REBARS BY CALCIUM NITRATE ADDITION

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Product Number: 51300-03287-SG
ISBN: 03287 2003 CP
Author: H. Justnes
Industry: Highways & Bridges
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Both calcium nitrate and calcium nitrite may act as anodic inhibitors against chloride induced corrosion of rebars in concrete through a similar mechanism, although the kinetics of reaction may be different. Recently an extended test programme was launched for direct comparison of inhibitor performance of calcium nitrate versus nitrite at equimolar dosage, in addition to comparison of the inhibitors against a reference concrete without inhibitor addition. The test program and strategy are described in detail. Specimens are still only 1 years old, so examples of inhibitor performance are taken from earlier simple tests. Keywords: Concrete, steel reinforcement, chloride, corrosion inhibitor, nitrate, nitrite
Both calcium nitrate and calcium nitrite may act as anodic inhibitors against chloride induced corrosion of rebars in concrete through a similar mechanism, although the kinetics of reaction may be different. Recently an extended test programme was launched for direct comparison of inhibitor performance of calcium nitrate versus nitrite at equimolar dosage, in addition to comparison of the inhibitors against a reference concrete without inhibitor addition. The test program and strategy are described in detail. Specimens are still only 1 years old, so examples of inhibitor performance are taken from earlier simple tests. Keywords: Concrete, steel reinforcement, chloride, corrosion inhibitor, nitrate, nitrite
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