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The corrosion inhibition effect of mild steel in si mulated concrete pore solution (SCPS) by Sodium N itrite and Zn 2+ has been investigated using weight loss method and cyclic voltammetry. The results show that 93% of i nhibition efficiency is achieved with binary system consistin g of 100 ppm of sodium nitrite – 50 ppm of Zn 2+ . Surface evaluation technique like FTIR is used to determi ne the nature of the protective film formed on the metal surface. The protective film consists of Fe 2+ - SN complex, Zn 2+ - SN complex and Zn(OH) 2 . Cyclic voltammetry study reveals that the protective film is more compact and stable even in 3.5% NaCl environment.
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Author(s): M Pandiarajan S RajendranJ Sathiya Bama and R Joseph Rathish
Concrete Corrosion, Simulated Concrete Pore Solution, Mild Steel, Sodium nitrite, Well water., Sodium nitrite, corrosion inhibitor, concrete pore solution