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The study displays the durability of Fe 500d and Fe 550d steel reinforcement embedded in OPC and PPC simulated concrete solution over a 12-month period, exposing them to a simulated marine environment with sulfate and chloride ions. This was accomplished via pH measurements and half-cell potential assessments. On the 180th day, PPC recorded a pH of 9.6, indicating better durability against corrosion, while OPC concretes showed a higher initial alkalinity (pH 12.2) compared to PPC. However, OPC’s rate of fall was faster, and at that point, the pH of OPC concretes reached 8.3. Fe 550d was more negative than Fe 500d, indicating a higher likelihood of corrosion based on half-cell potential tests. The initiation of corrosion occurred more swiftly for both steel types in OPC, yet remained slower than in water. Potentials decreased to −365 mV for OPC. In the instance of PPC, potentials evolved at a slower rate for both steel types yet remained less negative for extended durations, including 12 months for PPC (−280 mV). PPC concrete demonstrated superior corrosion resistance due to its reduced permeability and enhanced pore structure, thereby offering effective protection against the corrosive effects on steel reinforcement in hostile environments. A PPC binder composite with Fe 500d steel is the most effective combination for enhancing the durability of reinforced concrete under marine exposure conditions.

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Evaluation of Corrosion Resistance of Steel Reinforcement in Simulated Concrete Pore Solution Using Electrochemical Tests

  • 会议论文

  • 发表日期：

    2025年

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  • Rahul Raghunath Kharade,
  • B. Kondraivendhan,
  • Chirag Thummar

摘要

The study displays the durability of Fe 500d and Fe 550d steel reinforcement embedded in OPC and PPC simulated concrete solution over a 12-month period, exposing them to a simulated marine environment with sulfate and chloride ions. This was accomplished via pH measurements and half-cell potential assessments. On the 180th day, PPC recorded a pH of 9.6, indicating better durability against corrosion, while OPC concretes showed a higher initial alkalinity (pH 12.2) compared to PPC. However, OPC’s rate of fall was faster, and at that point, the pH of OPC concretes reached 8.3. Fe 550d was more negative than Fe 500d, indicating a higher likelihood of corrosion based on half-cell potential tests. The initiation of corrosion occurred more swiftly for both steel types in OPC, yet remained slower than in water. Potentials decreased to −365 mV for OPC. In the instance of PPC, potentials evolved at a slower rate for both steel types yet remained less negative for extended durations, including 12 months for PPC (−280 mV). PPC concrete demonstrated superior corrosion resistance due to its reduced permeability and enhanced pore structure, thereby offering effective protection against the corrosive effects on steel reinforcement in hostile environments. A PPC binder composite with Fe 500d steel is the most effective combination for enhancing the durability of reinforced concrete under marine exposure conditions.