Corrosion studies of fly ash and fly ash-slag based geopolymer

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Main Authors: Farah Farhana, Zainal, ‪Siti Farahnabilah, Muhd Amli, Kamarudin, Hussin, Azmi, Rahmat, Mohd Mustafa Al Bakri, Abdullah
Other Authors: farahfarhana@unimap.edu.my
Format: Article
Language:English
Published: IOP Publishing Ltd 2022
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Online Access:http://dspace.unimap.edu.my:80/xmlui/handle/123456789/74589
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spelling my.unimap-745892022-03-07T08:31:52Z Corrosion studies of fly ash and fly ash-slag based geopolymer Farah Farhana, Zainal ‪Siti Farahnabilah, Muhd Amli Kamarudin, Hussin Azmi, Rahmat Mohd Mustafa Al Bakri, Abdullah farahfarhana@unimap.edu.my Center of Excellence Geopolymer and Green Technology (CEGeoGTech), School of Materials Engineering, Universiti Malaysia Perlis (UniMAP) Faculty of Engineering Technology, Universiti Malaysia Perlis (UniMAP) Geopolymers Fly ash Fly ash geopolymer (FG) Fly ash-slag geopolymer (FSG) Link to publisher's homepage at https://iopscience.iop.org/ This paper presents the results of corrosion studies between Fly Ash Geopolymer (FG) paste and Fly Ash-Slag Geopolymer (FSG) paste. Geopolymer was made from aluminosilicate inorganic polymers mixed with the alkaline activator in order to reduce the carbon dioxide (CO₂) to the ecosystem. Samples then were cured at 60ºC for 24 hours in the oven. Reinforcement bar is placed at the center of the paste. The samples were examined after 7, 14 and 28 days in terms of Open Circuit Potential (OCP) test, phase analysis and morphology analysis. The potential values regarding OCP test for FSG paste from 7 days until 28 days are 0.464 V, 0.474 V and 0.498 V more positive than FG paste which the potential values are 0.087 V, 0.133 V and 0.206 V respectively. From the Pourbaix diagram, all the potential values for FG paste and FSG paste were located in the same Fe₂O₃, passivity region. Passive layer which is the oxide form exists in this region to protect the reinforcement bar from corrosion agents. It can be proved from phase analysis results which iron oxide hydroxide (FeOOH), hematite (Fe₂O₃) and magnetite (Fe₃O₄) peaks exist. The differences of morphological structures of these pastes were observed by Scanning Electron Microscope (SEM). It shows that FSG paste had good corrosion resistance and low corrosion rate compared to FG paste. 2022 2022-03-07T08:31:52Z 2022-03-07T08:31:52Z 2017-06 Article IOP Conference Services: Material Sciences Engineering, vol.209, 2017, 7 pages 1757-899x (online) http://dspace.unimap.edu.my:80/xmlui/handle/123456789/74589 https://doi.org/10.1088/1757-899x/209/1/012026 en International Conference on Innovative Research (ICIR Euroinvent 2017); IOP Publishing Ltd
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Geopolymers
Fly ash
Fly ash geopolymer (FG)
Fly ash-slag geopolymer (FSG)
spellingShingle Geopolymers
Fly ash
Fly ash geopolymer (FG)
Fly ash-slag geopolymer (FSG)
Farah Farhana, Zainal
‪Siti Farahnabilah, Muhd Amli
Kamarudin, Hussin
Azmi, Rahmat
Mohd Mustafa Al Bakri, Abdullah
Corrosion studies of fly ash and fly ash-slag based geopolymer
description Link to publisher's homepage at https://iopscience.iop.org/
author2 farahfarhana@unimap.edu.my
author_facet farahfarhana@unimap.edu.my
Farah Farhana, Zainal
‪Siti Farahnabilah, Muhd Amli
Kamarudin, Hussin
Azmi, Rahmat
Mohd Mustafa Al Bakri, Abdullah
format Article
author Farah Farhana, Zainal
‪Siti Farahnabilah, Muhd Amli
Kamarudin, Hussin
Azmi, Rahmat
Mohd Mustafa Al Bakri, Abdullah
author_sort Farah Farhana, Zainal
title Corrosion studies of fly ash and fly ash-slag based geopolymer
title_short Corrosion studies of fly ash and fly ash-slag based geopolymer
title_full Corrosion studies of fly ash and fly ash-slag based geopolymer
title_fullStr Corrosion studies of fly ash and fly ash-slag based geopolymer
title_full_unstemmed Corrosion studies of fly ash and fly ash-slag based geopolymer
title_sort corrosion studies of fly ash and fly ash-slag based geopolymer
publisher IOP Publishing Ltd
publishDate 2022
url http://dspace.unimap.edu.my:80/xmlui/handle/123456789/74589
_version_ 1729704778681810944
score 13.222552