Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry


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Electrochemical Behavior of Reinforcement Steel in Simulate Concrete Pore Solution with and without Chloride Ions

Author(s): Ehteram A Noor, Aisha Al-Moubaraki H, Dalal I Al-Masoudi

Reinforcement steel working electrode was used in electrochemical tests (EIS and PDP) after 0 h and 24 h immersion in SCP solutions (saturated Ca(OH)2) maintained at 30°C with and without various [Cl-]. EIS data obtained both at 0 h and 24 h immersion revealed that at 0.01 M<[Cl-]<0.10 M, steel resists corrosion more than the Cl- free solution, while at [Cl-] ï?³ 0.10 M steel corrosion rate increases appreciably. PDP data showed that at (i) [Cl-]<0.05 M for 0 h immersion and (ii) [Cl-]<0.2 5 M for 24 h immersion, steel resists pitting corrosion even if it was polarized to the oxygen evolution potential, indicating film formation of corrosion products on the steel surface which becomes more denser with increasing immersion time. Accordingly, the CTL and the corresponding ratio ([OH]/[Cl-]) of steel in SCP solution varied with the immersion period as well as with the techniques used.


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