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MgAl-LDH/graphene protective film: Insight into LDH-graphene interaction
Department of Industrial Engineering, University of Trento, TN, Italy.
Department of Industrial Engineering, University of Trento, TN, Italy.
Department of Mechanical and Aerospace Engineering, Air University Islamabad, Pakistan.
Department of Physics, University of Trento, TN, Italy.
Vise andre og tillknytning
2020 (engelsk)Inngår i: Surface & Coatings Technology, ISSN 0257-8972, E-ISSN 1879-3347, Vol. 401, artikkel-id 126253Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

MgAl-layered double hydroxides (LDHs) thin films, exhibiting two distinct surface morphologies (Platelet and Cauliflower-like), were synthesized directly on the aluminum substrate. The as-prepared films were further modified with graphene due to the chemical inertness of graphene and its capability to act as a possible physical barrier against ionic media. The morphology and structure of MgAl-LDH/graphene composite films are fully characterized. The corrosion resistance properties were analyzed through Electrochemical impedance spectroscopy and the results were further fitted using “ZSimpWin” software to evaluate coating behavior. The graphene was found to interact with the LDH structure and provide another pathway for the corrosion reactions and results in improve LDHs corrosion resistance properties. The sealing effect of graphene resists the aggressive media penetration and caused an increase of one order magnitude in impedance modulus of MgAl-LDHs. The enhancement in corrosion resistance properties is attributed to the graphene impermeable behavior against corrosive species confirmed by physical and electrochemical characterizations.

sted, utgiver, år, opplag, sider
Elsevier, 2020. Vol. 401, artikkel-id 126253
Emneord [en]
MgAl-LDH, Graphene, Raman, FIB-SEM, Thin films, EIS
HSV kategori
Identifikatorer
URN: urn:nbn:se:hj:diva-50600DOI: 10.1016/j.surfcoat.2020.126253ISI: 000583161500021Scopus ID: 2-s2.0-85090563023Lokal ID: PP JTH 2020 embargo 24;JTHMaterialISOAI: oai:DiVA.org:hj-50600DiVA, id: diva2:1466763
Tilgjengelig fra: 2020-09-14 Laget: 2020-09-14 Sist oppdatert: 2020-12-15bibliografisk kontrollert

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Zanella, Caterina

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