Effect of Electrodeposition Parameters on the Morphology, Topography and Corrosion Resistance of Epoxy Resin/Zinc Hybrid Coatings

Autor:	Gina Genoveva Istrate, Stefan Catalin Pintilie, Alina Crina Mureşan, Daniela Laura Buruiana
Rok vydání:	2021
Předmět:	Materials science Scanning electron microscope 020209 energy Nucleation chemistry.chemical_element sulphate reducing bacteria 02 engineering and technology Zinc engineering.material Electrochemistry lcsh:Technology Article Corrosion topography Coating 0202 electrical engineering electronic engineering information engineering Surface roughness General Materials Science lcsh:Microscopy lcsh:QC120-168.85 corrosion resistance lcsh:QH201-278.5 lcsh:T Epoxy 021001 nanoscience & nanotechnology epoxy resin/zinc coatings Chemical engineering chemistry lcsh:TA1-2040 visual_art electrodeposition visual_art.visual_art_medium engineering lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology lcsh:TK1-9971
Zdroj:	Materials Volume 14 Issue 8 Materials, Vol 14, Iss 1991, p 1991 (2021)
ISSN:	1996-1944
DOI:	10.3390/ma14081991
Popis:	The paper presents the morphology, topography and corrosion behavior of epoxy resin/zinc hybrid coatings obtained by electrodeposition from zinc sulphate electrolyte. The effect of current density and mean diameter size of polymer particles used for electrodeposition of the epoxy resin/zinc coatings on the morphology, topography and roughness of the surfaces were investigated by Scanning Electron Microscopy and Atomic Force Microscopy. The corrosion behavior of the hybrid coatings in 0.5 M sodium chloride solution was evaluated using electrochemical methods. For microbiological corrosion, the effect of sulphate reducing bacteria (SRB) on the surfaces was evaluated using epifluorescence microscopy. The surface roughness before and after bacteria attachment was evaluated using Atomic force microscopy. Polymer particles provide an influence in restricting the growth of zinc crystals as well as a catalytic role in nucleation sites increase. The results of electrochemical tests indicate a very good corrosion resistance of hybrid coatings comparing with zinc coatings. Epifluorescence images demonstrate that hybrid coating surfaces are slightly attacked by sulphate reducing bacteria.
Databáze:	OpenAIRE
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