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Comparison of Electropolishing of Aluminum in a Deep Eutectic Medium and Acidic Electrolyte

Research advances in electropolishing, with respect to the field of metalworking, have afforded significant improvements in the surface roughness and conductivity properties of aluminum polished surfaces in ways that machine polishing and simple chemical polishing cannot. The effects of a deep eutec...

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Autores principales: Abdel-Fattah, Tarek M., Loftis, J. Derek
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7730155/
https://www.ncbi.nlm.nih.gov/pubmed/33287431
http://dx.doi.org/10.3390/molecules25235712
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author Abdel-Fattah, Tarek M.
Loftis, J. Derek
author_facet Abdel-Fattah, Tarek M.
Loftis, J. Derek
author_sort Abdel-Fattah, Tarek M.
collection PubMed
description Research advances in electropolishing, with respect to the field of metalworking, have afforded significant improvements in the surface roughness and conductivity properties of aluminum polished surfaces in ways that machine polishing and simple chemical polishing cannot. The effects of a deep eutectic medium as an acid-free electrolyte were tested to determine the potential energy thresholds during electropolishing treatments based upon temperature, experiment duration, current, and voltage. Using voltammetry and chronoamperometry tests during electropolishing to supplement representative recordings via atomic force microscopy (AFM), surface morphology comparisons were performed regarding the electropolishing efficiency of phosphoric acid and acid-free ionic liquid treatments for aluminum. This eco-friendly solution produced polished surfaces superior to those surfaces treated with industry standard acid electrochemistry treatments of 1 M phosphoric acid. The roughness average of the as-received sample became 6.11 times smoother, improving from 159 nm to 26 nm when electropolished with the deep eutectic solvent. This result was accompanied by a mass loss of 0.039 g and a 7.2 µm change in step height along the edge of the electropolishing interface, whereas the acid treatment resulted in a slight improvement in surface roughness, becoming 1.63 times smoother with an average post-electropolishing roughness of 97.7 nm, yielding a mass loss of 0.0458 g and a step height of 8.1 µm.
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spelling pubmed-77301552020-12-12 Comparison of Electropolishing of Aluminum in a Deep Eutectic Medium and Acidic Electrolyte Abdel-Fattah, Tarek M. Loftis, J. Derek Molecules Article Research advances in electropolishing, with respect to the field of metalworking, have afforded significant improvements in the surface roughness and conductivity properties of aluminum polished surfaces in ways that machine polishing and simple chemical polishing cannot. The effects of a deep eutectic medium as an acid-free electrolyte were tested to determine the potential energy thresholds during electropolishing treatments based upon temperature, experiment duration, current, and voltage. Using voltammetry and chronoamperometry tests during electropolishing to supplement representative recordings via atomic force microscopy (AFM), surface morphology comparisons were performed regarding the electropolishing efficiency of phosphoric acid and acid-free ionic liquid treatments for aluminum. This eco-friendly solution produced polished surfaces superior to those surfaces treated with industry standard acid electrochemistry treatments of 1 M phosphoric acid. The roughness average of the as-received sample became 6.11 times smoother, improving from 159 nm to 26 nm when electropolished with the deep eutectic solvent. This result was accompanied by a mass loss of 0.039 g and a 7.2 µm change in step height along the edge of the electropolishing interface, whereas the acid treatment resulted in a slight improvement in surface roughness, becoming 1.63 times smoother with an average post-electropolishing roughness of 97.7 nm, yielding a mass loss of 0.0458 g and a step height of 8.1 µm. MDPI 2020-12-03 /pmc/articles/PMC7730155/ /pubmed/33287431 http://dx.doi.org/10.3390/molecules25235712 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
Abdel-Fattah, Tarek M.
Loftis, J. Derek
Comparison of Electropolishing of Aluminum in a Deep Eutectic Medium and Acidic Electrolyte
title Comparison of Electropolishing of Aluminum in a Deep Eutectic Medium and Acidic Electrolyte
title_full Comparison of Electropolishing of Aluminum in a Deep Eutectic Medium and Acidic Electrolyte
title_fullStr Comparison of Electropolishing of Aluminum in a Deep Eutectic Medium and Acidic Electrolyte
title_full_unstemmed Comparison of Electropolishing of Aluminum in a Deep Eutectic Medium and Acidic Electrolyte
title_short Comparison of Electropolishing of Aluminum in a Deep Eutectic Medium and Acidic Electrolyte
title_sort comparison of electropolishing of aluminum in a deep eutectic medium and acidic electrolyte
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7730155/
https://www.ncbi.nlm.nih.gov/pubmed/33287431
http://dx.doi.org/10.3390/molecules25235712
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