Al-Negheimish, Abdulaziz and Hussain, R R and Alhozaimy, Abdulrahman (2021) Corrosion performance of hot-dip galvanized zinc-aluminum coated steel rebars in comparison to the conventional pure zinc coated rebars in concrete environment. Construction and Building Materials, 274 . p. 121921.
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In this investigation zinc was alloyed with aluminum in order to improve the corrosion resistance of hot-dip galvanized coated steel rebars in contact with chloride-contaminated concrete. To rapidly assess the role of aluminum alloying in zinc, test panels in sheet form containing 10%, 15%, 20%, and 30% aluminum in zinc were prepared and evaluated in terms of their corrosion resistance via salt spray exposure tests. It was found that 10%Al-90%Zn (10AZ) provided the best results. Mild steel rebars were galvanized in 90% Zn-10%Al and 100%Zn (100Z) baths and their corrosion resistance performances when they were exposed to simulated concrete pore solution and embedded in mortars were examined. The10AZ-coated rebar showed superior corrosion resistance performance to the 100Z-coated rebar. Electrochemical impedance spectroscopy, DC polarization, scanning electron microscopy, Raman spectroscopy, and X-ray diffraction techniques were used to study the kinetics and corrosion mechanism of the coated rebars. (C) 2020 Elsevier Ltd. All rights reserved.
|Uncontrolled Keywords:||Zinc; Aluminum; Corrosion; Hot-dip galvanizing; Chloride; Coated steel rebars; Mortar; Concrete; EIS; Nano-technology|
|Divisions:||Material Science and Technology|
|Deposited By:||Sahu A K|
|Deposited On:||03 Mar 2021 12:39|
|Last Modified:||03 Mar 2021 17:10|
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