Fe3O4/GO nanocomposite modified glassy carbon electrode as a novel voltammetric sensor for determination of bisphenol A http://dx.doi.org/10.5599/jese.1521 577 J. Electrochem. Sci. Eng. 12(4) (2022) 577-578; http://dx.doi.org/10.5599/jese.1521 Open Access : : ISSN 1847-9286 www.jESE-online.org Editorial Advances in processing and characterization of conversion coatings Jelena Bajat Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, Serbia email: jela@tmf.bg.ac.rs There is an ongoing demand for metal surface properties improvement. New films with altered physical and chemical properties that provide the substrates with new functionalities are increasingly examined and widely disseminated. One of the broadly used traditional surface modifications is conversion coatings (CC), formed in situ on a metal surface by the chemical or electrochemical reaction of the metal substrate with anions in the solution. New synthesis routes and performances of CCs are emerging with requests spanning from better appearance, increased adhesion, hardness, wear or lubricity, and corrosion protection. The present special issue of the Journal of Electrochemical Science and Engineering presents contributions on various kinds of non-toxic conversion coatings on different metal substrates: steel, stainless steel, zinc, copper, aluminum, and the broad range of their properties and applications. Different functions require surface science and surface engineering at a molecular level and are related to the chemical, phase and morphological nature of their surfaces. The effect of stainless steel annealing on the adhesion of TiO2 spray coating was discussed in [1]. Another novel approach to enhancing adhesion was proposed in [2], by a two-step synthesis of porous indium phosphide with nickel oxide crystallites, as a potential material in modern electronic instrumentation. The influence of ultrasound intensities on hydrodynamic conditions in copper coatings electrodeposition was analyzed in [3]. Besides Pt, as an inert electrode, the thiophene synthesis by electropolymerization was successfully attained also on various oxidizable metals: Ti, Ni and stainless steel, via soluble oligomers of thiophene, as described in [4]. Superhydrophobicity, showing strong water-repellency, is an important property in many applications. The production of metal textured surfaces with uniform superhydrophobic properties using laser texturing was presented in [5]. In the research in [6], a high-velocity oxy-fuel thermal spraying technique was applied to deposition WC-10Co-4Cr coatings reinforced with yttria-stabilized zirconia (Y2O3/ZrO2; YSZ) nanoparticles on steel turbine. The second group of articles presented in this special issue is related to new achievements in tailoring CCs for corrosion protection. The sacrificial ZnFe alloy coating electrodeposited on steel was further modified by a hybrid sol-gel silane coating [7], while electrodeposited Zn coating on steel was modified by electroless cerium oxide layer deposition and additional sealing in boiling http://dx.doi.org/10.5599/jese.1521 http://dx.doi.org/10.5599/jese.1521 http://www.jese-online.org/ mailto:jela@tmf.bg.ac.rs J. Electrochem. Sci. Eng. 12(4) (2022) 577-578 CONVERSION COATINGS 578 water [8]. Ce was also used in [9] as a dopant in hydrotalcite-type protective chemical conversion coatings on aluminium alloy AA 7075. Finally, the effect of tannic acid embedded in polystyrene coatings either directly or within mesoporous silica-nano-containers on the corrosion protection of steel and zinc substrates was discussed in [10]. References [1] N. I. B. Omar, S. B. Mohamed, Y. B. Yusuf, T. B. A. Rahim, Z. B. Mustafa, S. B. Ismail, I. A. B. A. Bakar, S. Selvamani, A preliminary study into the effect of oxide chemistry on the bonding mechanism of cold-sprayed titanium dioxide coatings on SUS316 stainless steel substrate, Journal of Electrochemical Science and Engineering 12(4) (2022) 579-591. https://doi.org/10.5599/jese.1423 [2] Y. Suchikova, I. Bohdanov, S. Kovachov, A. Lazarenko, I. Bardus, A. Dauletbekova, I. Kenzhina, A. I. Popov, The Synthesis of porous indium phosphide with nickel oxide crystallites on the surface, Journal of Electrochemical Science and Engineering 12(4) (2022) 593-601. https://doi.org/10.5599/jese.1301 [3] I. Mladenović, J. Lamovec, D. Vasiljević Radović, V. Radojević, N. D. Nikolić, Influence of intensity of ultrasound on morphology and hardness of copper coatings obtained by electrodeposition, Journal of Electrochemical Science and Engineering 12(4) (2022) 603- 615. https://doi.org/10.5599/jese.1290 [4] M. Bouabdallaoui, Z. Aouzal, A. Q. El Guerraf, M. Bazzaoui, E. A. Bazzaoui, Electrodeposition of strictly alpha,alpha’-polythiophene chains on oxidizable metals in acidic concentrated aqueous media, Journal of Electrochemical Science and Engineering 12(4) (2022) 617-637. https://doi.org/10.5599/jese.1201 [5] V. Kumar, R. Verma, H. K. Bairwa, Fabrication of superhydrophobic surfaces by laser surface texturing and autoxidation, Journal of Electrochemical Science and Engineering 12(4) (2022) 639-649. https://doi.org/10.5599/jese.1260 [6] R. Kumar, D. Bhandari, K. Goyal, Mechanical and microstructural characterization of yttria- stabilized zirconia (Y2O3/ZrO2; YSZ) nanoparticles reinforced WC-10Co-4Cr coated turbine steel, Journal of Electrochemical Science and Engineering 12(4) (2022) 651-666. https://doi.org/10.5599/jese.1190 [7] C. Arrighi, Y. Paint, C. Savall, J. Creus, M. Olivier, Improvement of the corrosion resistance of electrodeposited Zn-Fe by sol-gel conversion films, Journal of Electrochemical Science and Engineering 12(4) (2022) 667-683. https://doi.org/10.5599/jese.1282 [8] S. V. Kozhukharov, C. Girginov, N. Boshkova, A. Tzanev, Impact of the final thermal sealing of combined zinc/cerium oxide protective coating primers formed on low carbon steel, Journal of Electrochemical Science and Engineering 12(4) (2022) 685-701. https://doi.org/10.5599/jese.1297 [9] A. Petica, A. C. Manea, G. Mihai, I. Nicola, V. Ceara, L. Anicai, Cerium-based conversion films developed on LiAl-layered double hydroxide coatings for corrosion protection of AA7075 aluminum alloys, Journal of Electrochemical Science and Engineering 12(4) (2022) 703-719. https://doi.org/10.5599/jese.1305 [10] J. Both, G. S. Szabo, G. Katona, L. M. Muresan, Anti-corrosive Polystyrene Coatings Modified with Tannic Acid on Zinc and Steel Substrates, Journal of Electrochemical Science and Engineering 12(4) (2022) 721-730. https://doi.org/10.5599/jese.1293 ©2022 by the authors; licensee IAPC, Zagreb, Croatia. This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) https://doi.org/10.5599/jese.1423 https://doi.org/10.5599/jese.1301 https://doi.org/10.5599/jese.1290 https://doi.org/10.5599/jese.1201 https://doi.org/10.5599/jese.1260 https://doi.org/10.5599/jese.1190 https://doi.org/10.5599/jese.1282 https://doi.org/10.5599/jese.1297 https://doi.org/10.5599/jese.1305 https://doi.org/10.5599/jese.1293 https://creativecommons.org/licenses/by/4.0/)