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Corrosion effects of CNT-nanofluids on different metals

Ismail, Ahmad Faris and Anuar, Asnida and Walvekar , Rashmi Gangasa and Yusaf, Talal F. (2014) Corrosion effects of CNT-nanofluids on different metals. WIT Transactions on Engineering Sciences, 87. pp. 139-146. ISSN 1743-3533

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Abstract

This study aims to determine the corrosion rates of three different metals (copper, stainless steel, and aluminium alloy) using CNT-nanofluids. Nanofluids have been extensively studied in enhancing heat transfer rates of conventional base fluids due to its efficiency and high thermal conductivity. Carbon nanotube (CNT) based nanofluids have demonstrated significantly higher thermal conductivity compared to nanofluids based on other nanoparticles. Though transport properties of CNT-nanofluids including its thermal conductivity, density and viscosity have been studied by large scientific community, there are only few studies carried out on its physical properties especially their reaction towards corrosion of different metals. Therefore, this study is carried out to compare the corrosion rates of three different metals using four different engine coolants with the variation of temperature from 27˚C to 90˚C. The coolants deployed in this work include ethylene glycol, water, and CNT-nanofluids with two different concentrations of 0.1 wt% and 0.02 wt% CNT. The CNT-nanfluids are stabilized using the Gum Arabic (GA) as the dispersant. The results reveal that for each metal, the corrosion rates in water are the highest followed by ethylene glycol and CNT-nanofluids with 0.02 wt% and 0.1 wt%. Among the three metals, the highest rate of corrosion occurs to aluminium, followed by stainless steel and copper, for all coolants used in this experimental study. Finally, the rate of corrosion increases with the increase of temperature for all cases.

Item Type: Article (Journal)
Additional Information: 1743/36827
Uncontrolled Keywords: corrosion, nanofluids, CNT, metals
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction
T Technology > TJ Mechanical engineering and machinery
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User: Prof Dr Ahmad Faris Ismail
Date Deposited: 06 Jun 2014 10:30
Last Modified: 06 Jun 2014 10:30
URI: http://irep.iium.edu.my/id/eprint/36827

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