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nThe anti-corrosive three binary (Zn-Ni, Zn-Co, Zn-Fe) and two ternary (Zn-Ni-Co, Zn-Co-Fe) alloy coating films on mild steel from acid chloride bath using sulphanilic acid and gelatin as additives for the electroplating technique. The normal Hull cell method was used to optimize the bath compositions, temperature and pH of the bath solutions for coating performance against corrosion. The cause of current density (CD) on metal weight percentage (M = Ni, Co, Fe), thickness (t), hardness (VH), and throwing power (TP) has been investigated. The corrosion resistance of binary and ternary alloy coating films was determined using the potentiodynamic polarization technique. The metal content in the coatings were determined by colorimetric method. Under optimal conditions, the corrosion rate of Zn-Ni-Co was approximately ~8 times, ~10 times higher than Zn-Ni, and Zn-Co coating films. Also Zn-Co-Fe coating film was approximately ~8 times, and ~13 times higher than Zn- Co and Zn-Fe coating films. Thus ternary zinc-nickel-cobalt and zinc-cobalt-iron coatings can replace usual binary alloy deposits for many industrial applications such as automobile, machinery items like tools, bolts, and nuts, etc.n

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1. Xiang T, Han Y, Guo Z, Wang R, et al. Fabrication of inherent anticorrosion super hydrophobic surfaces on metals. ACS Sustainable Chemistry & Engineering. 2018 6 (4): 5598–606.
2. Thangaraj V, Hegde A C. Electrode position and compositional behaviour of Zn-Ni alloy. Indian J. Chem. Technol. 2007; 14: 246–252.
3. Bhat RS, Bekal S, Hegde AC, Fabrication of Zn-Ni alloy coatings from acid chloride bath and its corrosion performance. Anal. Bioanal. Electrochem. 2018; 10 (12): 1562–1573.
4. Panagopoulos CN, Lagaris DA, Vatista PC. Adhesion and corrosion behaviour of Zn–Co electrodeposits on mild steel. Mater. Chem. Phys. 2011; 126: 398–403.
5. Bhat RS, Hegde AC. Corrosion behavior of Zn-Co alloy coating from acid sulphate bath. Anal. Bioanal. Electrochem. 2014; 6 (5): 606–622.
6. Karahan H. A study on electrodeposited Zn1− x Fe x alloys. J. Mater. Sci. 2007; 42: 10160–10163. 7. Bhat RS, Bhat KU, Hegde AC. Optimization of deposition conditions for bright Zn-Fe coatings and its characterization. Prot. Met. Phys. Chem. Surf. 2011; 47 (5): 645–653.
8. Dıaz SL, Mattos OR, Barcia O.E, et al. Zn-Fe anomalous electrodeposition: Stationaries and local pH measurements. Electrochim. Acta. 2002; 47: 4091–4100.
9. Lin CC, Huang CM. Zinc-Nickel alloy coatings electrodeposited by pulse current and their corrosion behavior. J. Coat. Technol. Res. 2006; 3: 99–104.
10. Blejan D, Bogdan D, Pop M, et al. Structure, Morphology and Corrosion Resistance of Zn-Ni-TiO2 composite Coatings. Optoelectron. Adv. Mater., Rapid Commun., 2011; 5: 25–29.
11. Bhat RS, and Hegde A C, Studies on electrodeposited Zn-Fe alloy coating on mild steel and its characterization. J. Electrochem. Sci. Eng. 2019; 9 (1): 9–16.
12. Brenner A. Electrodeposition of Alloys, Vol. II. Academic Press: New York; 1963.
13. Younan MM. Surface Microstructure and Corrosion Resistance of Electrodeposited Ternary Zn-Ni-Co Alloy. J. Appl. Electrochem. 2000; 30: 55–60.
14. Eliaz N, Venkatakrishna K, Hegde A C. Electroplating and characterization of Zn–Ni, Zn–Co and Zn–Ni–Co alloys. Surf. Coat. Technol. 2010; 205: 1969–1978.
15. Hegde AC, Venkatakrishna K, Eliaz N. Electrodeposition of Zn–Ni, Zn–Fe and Zn–Ni–Fe alloys. Surf. Coat. Technol. 2010; 205 (7): 2031–2041.
16. Abou-Krisha MM, Assaf FH, El-Naby SA. Electrodeposition behavior of zinc–nickel–iron alloys from sulfate bath. J. Solid. State. Electrochem. 2009; 13: 879–885.
17. Bhat RS, Bhat UK, Hegde AC. Corrosion Behavior of Electrodeposited Zn-Ni, Zn-Co and Zn-Ni-Co Alloys. Anal. Bioanal. Electrochem. 2011; 3 (3): 302–315.
18. Bhat RS, Hegde AC. Optimization of bright Zn-Co-Ni alloy coatings and its characterization. Anal. Bioanal. Electrochem., 2013; 5 (5): 609–621.
19. Hoen-Velterop L, Lohdi ZF, Mol JMC, et al. Corrosion resistance of Zn–Co–Fe alloy coatings on high strength steel. Surf. Coat. Technol. 2009; 203 (10–11): 1415–1422.
20. Bhat RS, Manjunatha KB, Prasanna Shankara R, Venkatakrishna K, et al. Electrochemical studies on the corrosion resistance of Zn–Ni–Co coating from acid chloride bath. Applied Physics A. 2020; 126: 772.
21. Vogel AI. Quantitative Inorganic Analysis, Longmans Green and Co London (1951).
22. Bhat RS, Shet VB. Development and characterization of Zn–Ni, Zn–Co and Zn–Ni–Co coatings. Surf. Eng. 2020; 36 (4): 429–437.
23. Bhat RS, Hegde AC. Electroplating and corrosion study of Zn-Co, Zn-Fe and Zn-Co-Fe alloys. Anal. Bioanal. Electrochem. 2012; 4 (6): 593–609.

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Journal of Thin Films, Coating Science Technology & Application

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[if 344 not_equal=””]ISSN: 2455-3344[/if 344]

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nThe use of cholesteric liquid crystal films, using the remarkable property of cholesteric liquid crystals to change their color at the temperature changes, is well known for measuring temperature, in medicine, in jewelry and so on. The article presents the practical use of cholesteric liquid crystal films in the developed musical color device, which “animates” the pattern with a multi-colored color in accordance with the frequency spectrum of the signal emanating from the musical electronic device on the black panel, and in the developed indicator of sorption processes, which highlights by the red color the collector’s coating of the surface of the mineral safely, cheaply and quickly.n

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1. Shibaev V.P. (2008). Liquid crystals-cholesterics: Chemistry and Life [online]. Available from http://www.chem.msu.ru/rus/teaching/shibajev-nauchpop/shibajev-himija.i.zhizn-2008.pdf.
2. Averyanov E.M. The special feature of the local field of light wave in the cholesteric liquid crystals, liquid crystals and their practical use. 2009; 28(2): 21–30.
3. Tomilin M.G., Nevskya G.E. (2010). Display on the liquid crystals: SPbGU[online]. Available from https://www.twirpx.com/file/288369/.
4. Shibaev V.P. (2012). Liquid crystals: Nature[online]. Available from http://www.chem.msu.ru/rus/teaching/shibajev-nauchpop/shibajev-priroda-2012-6.pdf.
5. Srivastava A.K., Tocnaye J.L., Dupont L. Liquid Crystal Active Glasses for 3D Cinema. Journal of display technology. 2010; 6(10): 522–530.
6. Popov P., Honaker L.W., Kooijman E.E., et al. A liquid crystal biosensor for specific detection of antigens. Sensing and Bio-Sensing Research. 2016; 8: 31–35.
7. Klyukin L.M., Morozov S.Yu. The analysis of the contemporary methods of diagnostics of breast cancer, medical technology, 2014, No 3.
8. Dogic Z., Sharma P., Zakhary M. Hypercomplex Liquid Crystals. Annual Review of Condensed Matter Physics. 2014; 5: 137–157.
9. Humar M., Musevic I. 3D microlasers from self-assembled cholesteric liquid crystal microdroplets. Optics Express. 2010; 18(26): 26995–27003.
10. Lu C., Chien L. A polymer-stabilized single-layer color cholesteric liquid crystal display with anisotropic reflection. Appl. Phys. Lett. 2007; 91(13).
11. Herzer N., Guneysu H., Davies D., Yildirim D., Vaccaro A. Printable Optical Sensors Based on H-Bonded Supramolecular Cholesteric Liquid Crystal Networks. J. Am. Chem. Soc. 2012; 134 (18): 7608–7611.
12. Kim K., Park K., Lee J., Yoon T. Long-pitch cholesteric liquid crystal cell for switchable achromatic reflection. Optics Express. 2010; 18(16): 16745–16750.
13. Hsiao Y., Wu C., Chen C., Zyryanov V., Lee W. Electro-optical device based on photonic structure with a dual-frequency cholesteric liquid crystal. Optics Letters. 2011; 36(14): 2632–2634.
14. Bitar R., Agez G., Mitov M. Cholesteric liquid crystal self-organization of gold nanoparticles. Soft Matter. 2011; 7: 8198–8206.
15. Shoikhedbrod M.P. Cholesteric liquid crystals. Toronto: Lambert Academic Publishing; 2017. 160p”

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