Author
K. Vathsala
Other affiliations: Indian Institute of Science, Tuskegee University
Bio: K. Vathsala is an academic researcher from Kuvempu University. The author has contributed to research in topics: Corrosion & Coating. The author has an hindex of 12, co-authored 13 publications receiving 721 citations. Previous affiliations of K. Vathsala include Indian Institute of Science & Tuskegee University.
Papers
More filters
TL;DR: In this paper, the hardness and microstructure of as plated and heat treated Ni−Zn−P and Ni-Zn-P−TiO 2 composite coatings were analyzed.
138 citations
TL;DR: In this article, the synergistic effect of iodide ions and benzisothiozole-3piperizine hydrochloride (BITP) on corrosion inhibition of mild steel in 0.5 m H 2 SO 4 solution has been studied by both chemical and electrochemical methods.
116 citations
TL;DR: In this article, the Zn and Zn-ZrO 2 composite coatings were compared by examining the experimental data acquired through polarization, open circuit potential (OCP) and Tafel measurements.
114 citations
TL;DR: In this paper, the performance of Zn-CeO 2 composite coatings through electrodeposition technique was successfully fabricated on mild steel substrate and the concentration of CeO 2 nanoparticles was varied in the electrolytic bath and the composites were electrodeposited both in the presence and absence of cetyltriammonium bromide (CTAB).
Abstract: The Zn-CeO 2 composite coatings through electrodeposition technique were successfully fabricated on mild steel substrate. As a comparison pure zinc coating was also prepared. The concentration of CeO 2 nanoparticles was varied in the electrolytic bath and the composites were electrodeposited both in the presence and absence of cetyltriammonium bromide (CTAB). The performance of the CeO 2 nanoparticles towards the deposition, crystal structure, texture, surface morphology and electrochemical corrosion behavior was studied. For characterizations of the electrodeposits, the techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM) were used. Both the additives ceria and surfactant polarize the reduction processes and thus influence the deposition process, surface nature and the electrochemical properties. The electrochemical experiments like potentiodynamic polarization and electrochemical impedance spectroscopic (EIS) studies carried out in 3.5 wt. NaCl solution explicit higher corrosion resistance by CeO 2 incorporated coating in the presence of surfactant. © 2012 Elsevier B.V. All rights reserved.
77 citations
TL;DR: A simple and efficient two-step hybrid electrochemical-thermal route was developed for the synthesis of large quantity of ZnO nanoparticles using aqueous sodium bicarbonate electrolyte and sacrificial Zn anode and cathode in an undivided cell under galvanostatic mode at room temperature as discussed by the authors.
Abstract: A simple and efficient two-step hybrid electrochemical–thermal route was developed for the synthesis of large quantity of ZnO nanoparticles using aqueous sodium bicarbonate electrolyte and sacrificial Zn anode and cathode in an undivided cell under galvanostatic mode at room temperature. The bath concentration and current density were varied from 30 to 120 mmol and 0.05 to 1.5 A/dm2. The electrochemically generated precursor was calcined for an hour at different range of temperature from 140 to 600 °C. The calcined samples were characterized by XRD, SEM/EDX, TEM, TG-DTA, FT-IR, and UV–Vis spectral methods. Rietveld refinement of X-ray data indicates that the calcined compound exhibits hexagonal (Wurtzite) structure with space group of P63mc (No. 186). The crystallite sizes were in the range of 22–75 nm based on Debye–Scherrer equation. The TEM results reveal that the particle sizes were in the order of 30–40 nm. The blue shift was noticed in UV–Vis absorption spectra, the band gaps were found to be 5.40–5.11 eV. Scanning electron micrographs suggest that all the samples were randomly oriented granular morphology.
71 citations
Cited by
More filters
TL;DR: The development of metal deposition processes based on electroless nickel, alloy and composite coatings on various surfaces has witnessed a surge in interest among researchers, with many recent applications made possible from many excellent properties as mentioned in this paper.
680 citations
TL;DR: In this article, the inhibition effects of 2-amino-5-mercapto-1,3,4-thiadiazole (2A5MT) and 2MT on mild steel corrosion in 1.0 M H2SO4 were studied with potentiodynamic polarization, linear polarization resistance and electrochemical impedance spectroscopy techniques.
386 citations
TL;DR: This non-experimental approach to corrosion could foster a better understanding of the corrosion inhibition processes by correlating actual inhibition mechanisms with molecular structures of these carbohydrate polymers.
369 citations
TL;DR: In this paper, a review article describes some recent major works in the field of metallic corrosion monitoring using organic inhibitors in acidic media, in which the presence of heteroatoms (O, S, N, and P) and π-electrons in the form of conjugation are among the most salient features of organic inhibitors.
324 citations
TL;DR: In this paper, the synthesis of zinc oxide nanoparticles (ZnO-NPs) using Ocimum basilicum L. var. purpurascens Benth.-Lamiaceae leaf extract and zinc nitrate was reported.
267 citations