Protection of Steel Rebar in Salt-Contaminated Cement Mortar Using Epoxy Nanocomposite Coatings
Joint Authors
Nguyen, Tuan Anh
Nguyen, The Huu
Source
International Journal of Electrochemistry
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-04-24
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Epoxy reinforced with two kinds of nanoparticles dealing with nano-SiO2 and nano-Fe2O3 was coated on steel rebar embedded in a chloride contaminated cement mortar.
NaCl was added to the fresh Portland cement paste (at 0.3% and 0.5% by weight of cement) to simulate the chloride contamination at the critical level.
The effect of incorporating nanoparticles on the corrosion resistance of epoxy-coated steel rebar was investigated by linear potentiodynamic polarization and electrochemical impedance spectroscopy.
For the 0.3 wt.% chloride mortars, the electrochemical monitoring of the coated steel rebars during immersion for 56 days in 0.1 M NaOH solutions suggested the beneficial role of nano-Fe2O3 particles in significantly improving the corrosion resistance of the epoxy-coated rebar.
After 56 days of immersion, the nano-Fe2O3 reduced the corrosion current of epoxy-coated rebar by a factor of 7.9.
When the chloride concentration in the cement mortar was 0.5 wt.%, the incorporation of nanoparticles into the epoxy matrix did not enhance the corrosion resistance of epoxy coating for the rebar.
At this critical level, chloride ions initiated rebar corrosion through nanoparticles at the epoxy/rebar interface.
American Psychological Association (APA)
Nguyen, The Huu& Nguyen, Tuan Anh. 2018. Protection of Steel Rebar in Salt-Contaminated Cement Mortar Using Epoxy Nanocomposite Coatings. International Journal of Electrochemistry،Vol. 2018, no. 2018, pp.1-10.
https://search.emarefa.net/detail/BIM-1172509
Modern Language Association (MLA)
Nguyen, The Huu& Nguyen, Tuan Anh. Protection of Steel Rebar in Salt-Contaminated Cement Mortar Using Epoxy Nanocomposite Coatings. International Journal of Electrochemistry No. 2018 (2018), pp.1-10.
https://search.emarefa.net/detail/BIM-1172509
American Medical Association (AMA)
Nguyen, The Huu& Nguyen, Tuan Anh. Protection of Steel Rebar in Salt-Contaminated Cement Mortar Using Epoxy Nanocomposite Coatings. International Journal of Electrochemistry. 2018. Vol. 2018, no. 2018, pp.1-10.
https://search.emarefa.net/detail/BIM-1172509
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1172509