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Corrosion Behaviour of 316L Stainless Steel in CNTs–Water Nanofluid: Effect of Temperature

The inhibition behavior of carbon nanotubes (CNTs) and Gum Arabic (GA) on the corrosion of 316L stainless steel in CNTs–water nanofluid under the effect of different temperatures was investigated by electrochemical methods and surface analysis techniques. Thereby, 316L stainless steel samples were e...

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Autores principales: Abdeen, Dana H., Atieh, Muataz A., Merzougui, Belabbes
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7796268/
https://www.ncbi.nlm.nih.gov/pubmed/33396606
http://dx.doi.org/10.3390/ma14010119
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author Abdeen, Dana H.
Atieh, Muataz A.
Merzougui, Belabbes
author_facet Abdeen, Dana H.
Atieh, Muataz A.
Merzougui, Belabbes
author_sort Abdeen, Dana H.
collection PubMed
description The inhibition behavior of carbon nanotubes (CNTs) and Gum Arabic (GA) on the corrosion of 316L stainless steel in CNTs–water nanofluid under the effect of different temperatures was investigated by electrochemical methods and surface analysis techniques. Thereby, 316L stainless steel samples were exposed to CNTs–water nanofluid under temperatures of 22, 40, 60 and 80 °C. Two concentrations of the CNTs (0.1 and 1.0 wt.% CNTs) were homogenously dispersed in deionized water using the surfactant GA and tested using three corrosion tests conducted in series: open circuit test, polarization resistance test, and potentiodynamic scans. These tests were also conducted on the same steel but in solutions of GA-deionized water only. Tests revealed that corrosion increases with temperature and concentration of the CNTs–water nanofluids, having the highest corrosion rate of 32.66 milli-mpy (milli-mil per year) for the 1.0 wt.% CNT nanofluid at 80 °C. In addition, SEM observations showed pits formation around areas of accumulated CNTs that added extra roughness to the steel sample. The activation energy analysis and optical surface observations have revealed that CNTs can desorb at higher temperatures, which makes the surface more vulnerable to corrosion attack.
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spelling pubmed-77962682021-01-10 Corrosion Behaviour of 316L Stainless Steel in CNTs–Water Nanofluid: Effect of Temperature Abdeen, Dana H. Atieh, Muataz A. Merzougui, Belabbes Materials (Basel) Article The inhibition behavior of carbon nanotubes (CNTs) and Gum Arabic (GA) on the corrosion of 316L stainless steel in CNTs–water nanofluid under the effect of different temperatures was investigated by electrochemical methods and surface analysis techniques. Thereby, 316L stainless steel samples were exposed to CNTs–water nanofluid under temperatures of 22, 40, 60 and 80 °C. Two concentrations of the CNTs (0.1 and 1.0 wt.% CNTs) were homogenously dispersed in deionized water using the surfactant GA and tested using three corrosion tests conducted in series: open circuit test, polarization resistance test, and potentiodynamic scans. These tests were also conducted on the same steel but in solutions of GA-deionized water only. Tests revealed that corrosion increases with temperature and concentration of the CNTs–water nanofluids, having the highest corrosion rate of 32.66 milli-mpy (milli-mil per year) for the 1.0 wt.% CNT nanofluid at 80 °C. In addition, SEM observations showed pits formation around areas of accumulated CNTs that added extra roughness to the steel sample. The activation energy analysis and optical surface observations have revealed that CNTs can desorb at higher temperatures, which makes the surface more vulnerable to corrosion attack. MDPI 2020-12-30 /pmc/articles/PMC7796268/ /pubmed/33396606 http://dx.doi.org/10.3390/ma14010119 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Abdeen, Dana H.
Atieh, Muataz A.
Merzougui, Belabbes
Corrosion Behaviour of 316L Stainless Steel in CNTs–Water Nanofluid: Effect of Temperature
title Corrosion Behaviour of 316L Stainless Steel in CNTs–Water Nanofluid: Effect of Temperature
title_full Corrosion Behaviour of 316L Stainless Steel in CNTs–Water Nanofluid: Effect of Temperature
title_fullStr Corrosion Behaviour of 316L Stainless Steel in CNTs–Water Nanofluid: Effect of Temperature
title_full_unstemmed Corrosion Behaviour of 316L Stainless Steel in CNTs–Water Nanofluid: Effect of Temperature
title_short Corrosion Behaviour of 316L Stainless Steel in CNTs–Water Nanofluid: Effect of Temperature
title_sort corrosion behaviour of 316l stainless steel in cnts–water nanofluid: effect of temperature
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7796268/
https://www.ncbi.nlm.nih.gov/pubmed/33396606
http://dx.doi.org/10.3390/ma14010119
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