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Effect of Electrode Potential on the Drag Force on Gold and Polyvinyl Butyral Surfaces in a Flowing Aqueous Fluoride Solution
It is shown that positive electrical polarization reduces the drag force on gold- and polyvinyl butyral (PVB)-coated spheres immersed in a stream of aqueous sodium fluoride solution. This effect is related to a decrease in the interfacial viscosity of the solution at the positively polarized gold an...
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Published in: | International journal of electrochemical science 2019-01, Vol.14 (1), p.441-452 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | It is shown that positive electrical polarization reduces the drag force on gold- and polyvinyl butyral (PVB)-coated spheres immersed in a stream of aqueous sodium fluoride solution. This effect is related to a decrease in the interfacial viscosity of the solution at the positively polarized gold and PVB surfaces, as obtained from quartz resonator measurements. The decrease in viscosity at a polymer- coated electrode is larger than that at a gold electrode, which is consistent with drag force measurements. The drag force reduction due to decreased interfacial viscosity at a polymer-coated metallic surface on application of an electrical potential widens the range of possible applications of this effect for active manipulation of wall-bounded liquid flows, given that the use of metal surfaces is limited by their risk of corrosion. |
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ISSN: | 1452-3981 1452-3981 |
DOI: | 10.20964/2019.01.62 |