The effect of aluminium nanocoating and water pH value on the wettability behavior of an aluminium surface

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dc.contributor.authorAli, Naser
dc.contributor.authorTeixeira, Joao Amaral
dc.contributor.authorAddali, Abdulmajid
dc.contributor.authorAl-Zubi, Feras
dc.contributor.authorShaban, Ehab
dc.contributor.authorBehbehani, Ismail
dc.date.accessioned2018-04-16T15:01:42Z
dc.date.available2018-04-16T15:01:42Z
dc.date.issued2018-02-27
dc.description.abstractExperimental investigation was performed to highlight the influence of ionic bounding and surface roughness effects on the surface wettability. Nanocoating technique via e-beam physical vapor deposition process was used to fabricate aluminium (Al) film of 50, 100, and 150 nm on the surface of an Al substrate. Microstructures of the samples before and after deposition were observed using an atomic force microscopy. A goniometer device was later on used to examine the influence of surface topography on deionised water of pH 4, 7 and 9 droplets at a temperature ranging from 10 °C to 60 °C through their contact angles with the substrate surface, for both coated and uncoated samples. It was found that, although the coated layer has reduced the mean surface roughness of the sample from 10.7 nm to 4.23 nm, by filling part of the microstructure gaps with Al nanoparticles, the wettability is believed to be effected by the ionic bounds between the surface and the free anions in the fluid. As the deionised water of pH 4, and 9 gave an increase in the average contact angles with the increase of the coated layer thickness. On the other hand, the deionised water of pH 7 has showed a negative relation with the film thickness, where the contact angle reduced as the thickness of the coated layer was increased. The results from the aforementioned approach had showed that nanocoating can endorse the hydrophobicity (unwitting) nature of the surface when associated with free ions hosted by the liquid.en_UK
dc.identifier.citationNaser Ali, Joao A. Teixeira, Abdulmajid Addali, et al., The effect of aluminium nanocoating and water pH value on the wettability behavior of an aluminium surface. Applied Surface Science, Volume 443, 15 June 2018, Pages 24-30en_UK
dc.identifier.issn0169-4332
dc.identifier.urihttps://doi.org/10.1016/j.apsusc.2018.02.182
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/13147
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectHydrophobicen_UK
dc.subjectHydrophilicen_UK
dc.subjectSurface topographyen_UK
dc.subjectElement analysisen_UK
dc.subjectCoatingen_UK
dc.subjectContact angleen_UK
dc.titleThe effect of aluminium nanocoating and water pH value on the wettability behavior of an aluminium surfaceen_UK
dc.typeArticleen_UK

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