NDLI: Influence of Chloride Ions on Electrochemical Corrosion Behavior of Dual-Phase Steel over Conventional Rebar in Pore Solution

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Influence of Chloride Ions on Electrochemical Corrosion Behavior of Dual-Phase Steel over Conventional Rebar in Pore Solution

Content Provider	MDPI
Author	Abdo, Hany S. Seikh, Asiful H. Mohammed, Jabair A. Luqman, Monis Ragab, Sameh A. Almotairy, Saud M.
Copyright Year	2020
Description	Reinforced steel bars (rebar) are extensively used in construction, and the main challenge is in minimizing corrosion due to oxide or passive layer breakdown. In contrast, dual-phase (DP) steel has good corrosion resistance. This study investigated the effect of Cl− ions on the electrochemical corrosion behavior of DP rebar and conventional rebar. Corrosion behavior studies and electrochemical measurements were conducted on DP rebar and conventional rebar in simulated concrete pore solution with different concentrations of Cl− ions. Microstructure analysis, surface morphology analysis, and corroded surface characterization were performed using optical microscopy, field emission scanning electron microscopy, and Raman spectroscopy, respectively. Potentiodynamic polarization and electrochemical impedance spectroscopy measurements revealed that DP rebar has good passivity, leading to better corrosion resistance and greater strength compared to ordinary rebar. In addition, DP rebar showed better passivity behavior compared to conventional rebar in alkaline solution. Therefore, the presence of a dual phase (ferrite and martensite) in reinforced concrete structured steel induces good corrosion resistance.
Starting Page	4568
e-ISSN	20763417
DOI	10.3390/app10134568
Journal	Applied Sciences
Issue Number	13
Volume Number	10
Language	English
Publisher	MDPI
Publisher Date	2020-06-30
Access Restriction	Open
Subject Keyword	Applied Sciences Characterization and Testing of Materials Dual Phase Steel Rebar Microstructure Annealing Electrochemical Properties
Content Type	Text
Resource Type	Article

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