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Vol. 28 No. 4 (2016): Vol 28 Issue 4

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Morphology and Optical Properties of Electropolished Steel in Presence of Vitamin C

https://doi.org/10.14233/ajchem.2016.19418
Fatma M. Abouzeid
Chemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt

Corresponding Author(s) : Fatma M. Abouzeid

fatmaabouzeid44@yahoo.com

Asian Journal of Chemistry, Vol. 28 No. 4 (2016): Vol 28 Issue 4

Abstract

The studies of steel electrochemical polishing in orthophoshoric acid were performed by potentiodynamic polarization. Electropolishing was conducted in solution containing vitamin C. Addition of vitamin C to electropolishing solution results in a lower limiting current. The concentration of vitamin C influences on electropolishing process and surface texture (AFM, SEM) and UV-VIS-NIR spectroscopy was established. The results show that by increasing vitamin C concentration from 2 × 10-5 to 5 × 10-5 M, roughness and reflectance of steel specimens decrease/increase respectively. The opposite trend is seen when the concentration increases to 10 × 10-5 M. The roughness of steel specimen before electropolishing is 236.7 nm and it will decrease to 140 nm by electropolishing in the presence of 5 × 10-5 M vitamin C. A similar trend is also seen in reflection. The SEM study confirms that low and moderate concentration of vitamin C was effective to enhance levelling and brightness more than higher concentrations.

Keywords

Steel Electropolishing Vitamin C Scanning electron microscope Atomic force microscope Reflectance
Abouzeid, F. M. (2015). Morphology and Optical Properties of Electropolished Steel in Presence of Vitamin C. Asian Journal of Chemistry, 28(4), 743–750. https://doi.org/10.14233/ajchem.2016.19418
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