{"paper_id":"2dfaba4c-fa64-4c14-b8d1-ba7047ab7021","body_text":"Enhancing Electrochemical Corrosion Resistance of Epoxy Coatings on Magnesium Alloy in Saline Solution via Integration of ZnO Nanoparticles and Graphene Oxide Nanosheets | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Enhancing Electrochemical Corrosion Resistance of Epoxy Coatings on Magnesium Alloy in Saline Solution via Integration of ZnO Nanoparticles and Graphene Oxide Nanosheets Khaled M. Chahrour, Khaled A. Jilo, Hayrettin Ahlatçı, Ahmed Abdel Nazeer This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7071527/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract This study explores the enhancement of anti-corrosive performance in epoxy coatings by incorporating ZnO nanoparticles and their modification with graphene oxide (GO) nanosheets. Various ZnO and GO weight percentages were optimized to develop a ZnO/GO nanocomposite as an efficient barrier within the Epoxy matrix. The most notable improvement was observed with 4.10 wt% ZnO and 0.05 wt% GO (ZnO 4.1 /GO 0.05 ), achieving a significant corrosion current rate (CR) of 4.170 mmpy, and a remarkable transfer charge resistance ( \\(\\:{R}_{ct}\\) ) of 499020 Ω \\(\\:.{cm}^{-2}\\) . These values are significantly higher than those of modified coatings with only ZnO nanoparticles (CR of 43.54 mmpy, \\(\\:{R}_{ct}\\) of 129000 Ω. \\(\\:{cm}^{-2}\\) ) and pure Epoxy coatings (CR of 854.4 mmpy, \\(\\:{R}_{ct}\\) of 54232 Ω \\(\\:.{cm}^{-2}\\) ), respectively. The anti-corrosion performance of the ZnO 4.10 /GO 0.05 coating was further validated after 72 hours of immersion in a 3.5 wt% NaCl saline solution, demonstrating superior resistance to degradation compared to other formulations. Morphological, structural, thermal, and surface properties of the prepared coatings were characterized using Scanning Electron Microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDX), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Thermogravimetric Analysis (TGA), Wettability, and Microhardness tests. The ZnO 4.10 /GO 0.05 nanocomposite-modified coating exhibited exceptional corrosion protection by effectively enhancing charge transfer resistance and inhibiting coating failure. Electrochemistry Materials Engineering Nanoscience Polymer Science Epoxy coating ZnO nanoparticles Graphene oxide Nanocomposite corrosion resistance Full Text Additional Declarations The authors declare no competing interests. Supplementary Files Supplementarydocument.docx Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {\"props\":{\"pageProps\":{\"initialData\":{\"identity\":\"rs-7071527\",\"acceptedTermsAndConditions\":true,\"allowDirectSubmit\":true,\"archivedVersions\":[],\"articleType\":\"Research Article\",\"associatedPublications\":[],\"authors\":[{\"id\":482220390,\"identity\":\"777ed12c-f74d-46d1-9486-0e248165d239\",\"order_by\":0,\"name\":\"Khaled M. Chahrour\",\"email\":\"data:image/png;base64,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\",\"orcid\":\"https://orcid.org/0000-0002-8799-3468\",\"institution\":\"\",\"correspondingAuthor\":true,\"prefix\":\"\",\"firstName\":\"Khaled\",\"middleName\":\"M.\",\"lastName\":\"Chahrour\",\"suffix\":\"\"},{\"id\":482220391,\"identity\":\"21f98131-4688-461e-8688-959dcfc4c6dc\",\"order_by\":1,\"name\":\"Khaled A. 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Various ZnO and GO weight percentages were optimized to develop a ZnO/GO nanocomposite as an efficient barrier within the Epoxy matrix. The most notable improvement was observed with 4.10 wt% ZnO and 0.05 wt% GO (ZnO\\u003csub\\u003e4.1\\u003c/sub\\u003e/GO\\u003csub\\u003e0.05\\u003c/sub\\u003e), achieving a significant corrosion current rate (CR) of 4.170 mmpy, and a remarkable transfer charge resistance (\\u003cspan class=\\\"InlineEquation\\\"\\u003e\\u003cspan class=\\\"mathinline\\\"\\u003e\\\\(\\\\:{R}_{ct}\\\\)\\u003c/span\\u003e\\u003c/span\\u003e) of 499020 Ω\\u003cspan class=\\\"InlineEquation\\\"\\u003e\\u003cspan class=\\\"mathinline\\\"\\u003e\\\\(\\\\:.{cm}^{-2}\\\\)\\u003c/span\\u003e\\u003c/span\\u003e. These values are significantly higher than those of modified coatings with only ZnO nanoparticles (CR of 43.54 mmpy, \\u003cspan class=\\\"InlineEquation\\\"\\u003e\\u003cspan class=\\\"mathinline\\\"\\u003e\\\\(\\\\:{R}_{ct}\\\\)\\u003c/span\\u003e\\u003c/span\\u003e of 129000 Ω.\\u003cspan class=\\\"InlineEquation\\\"\\u003e\\u003cspan class=\\\"mathinline\\\"\\u003e\\\\(\\\\:{cm}^{-2}\\\\)\\u003c/span\\u003e\\u003c/span\\u003e) and pure Epoxy coatings (CR of 854.4 mmpy, \\u003cspan class=\\\"InlineEquation\\\"\\u003e\\u003cspan class=\\\"mathinline\\\"\\u003e\\\\(\\\\:{R}_{ct}\\\\)\\u003c/span\\u003e\\u003c/span\\u003e of 54232 Ω\\u003cspan class=\\\"InlineEquation\\\"\\u003e\\u003cspan class=\\\"mathinline\\\"\\u003e\\\\(\\\\:.{cm}^{-2}\\\\)\\u003c/span\\u003e\\u003c/span\\u003e), respectively. The anti-corrosion performance of the ZnO\\u003csub\\u003e4.10\\u003c/sub\\u003e/GO\\u003csub\\u003e0.05\\u003c/sub\\u003e coating was further validated after 72 hours of immersion in a 3.5 wt% NaCl saline solution, demonstrating superior resistance to degradation compared to other formulations. Morphological, structural, thermal, and surface properties of the prepared coatings were characterized using Scanning Electron Microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDX), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Thermogravimetric Analysis (TGA), Wettability, and Microhardness tests. The ZnO\\u003csub\\u003e4.10\\u003c/sub\\u003e/GO\\u003csub\\u003e0.05\\u003c/sub\\u003e nanocomposite-modified coating exhibited exceptional corrosion protection by effectively enhancing charge transfer resistance and inhibiting coating failure.\\u003c/p\\u003e\",\"manuscriptTitle\":\"Enhancing Electrochemical Corrosion Resistance of Epoxy Coatings on Magnesium Alloy in Saline Solution via Integration of ZnO Nanoparticles and Graphene Oxide Nanosheets\",\"msid\":\"\",\"msnumber\":\"\",\"nonDraftVersions\":[{\"code\":1,\"date\":\"2025-07-08 15:21:02\",\"doi\":\"10.21203/rs.3.rs-7071527/v1\",\"editorialEvents\":[{\"type\":\"communityComments\",\"content\":0}],\"status\":\"published\",\"journal\":{\"display\":true,\"email\":\"info@researchsquare.com\",\"identity\":\"researchsquare\",\"isNatureJournal\":false,\"hasQc\":true,\"allowDirectSubmit\":true,\"externalIdentity\":\"\",\"sideBox\":\"\",\"snPcode\":\"\",\"submissionUrl\":\"/submission\",\"title\":\"Research Square\",\"twitterHandle\":\"researchsquare\",\"acdcEnabled\":true,\"dfaEnabled\":false,\"editorialSystem\":\"\",\"reportingPortfolio\":\"\",\"inReviewEnabled\":false,\"inReviewRevisionsEnabled\":true}}],\"origin\":\"\",\"ownerIdentity\":\"0c899df1-483e-482f-a929-63a8d3aa8ca2\",\"owner\":[],\"postedDate\":\"July 8th, 2025\",\"published\":true,\"recentEditorialEvents\":[],\"rejectedJournal\":[],\"revision\":\"\",\"amendment\":\"\",\"status\":\"posted\",\"subjectAreas\":[{\"id\":51227755,\"name\":\"Electrochemistry\"},{\"id\":51227756,\"name\":\"Materials Engineering\"},{\"id\":51227757,\"name\":\"Nanoscience\"},{\"id\":51227758,\"name\":\"Polymer Science\"}],\"tags\":[],\"updatedAt\":\"2025-07-08T15:21:02+00:00\",\"versionOfRecord\":[],\"versionCreatedAt\":\"2025-07-08 15:21:02\",\"video\":\"\",\"vorDoi\":\"\",\"vorDoiUrl\":\"\",\"workflowStages\":[]},\"version\":\"v1\",\"identity\":\"rs-7071527\",\"journalConfig\":\"researchsquare\"},\"__N_SSP\":true},\"page\":\"/article/[identity]/[[...version]]\",\"query\":{\"redirect\":\"/article/rs-7071527\",\"identity\":\"rs-7071527\",\"version\":[\"v1\"]},\"buildId\":\"8U1c8b4HqxoKbykW_rLl7\",\"isFallback\":false,\"isExperimentalCompile\":false,\"dynamicIds\":[84888],\"gssp\":true,\"scriptLoader\":[]}","source_license":"CC-BY-4.0","license_restricted":false}