Abstract
The enhancement of corrosion protection of metals and alloys by coating with simple, low cost, and highly adhered layer is still a main goal of many workers. In this research graphite flakes converted into graphene oxide using modified Hammers method and then reduced graphene oxide was electrodeposited on stainless steel 316, copper, and aluminum for corrosion protection application in seawater at four temperatures, namely, 20, 30, 40, and 50°C. All corrosion measurements, kinetics, and thermodynamics parameters were established from Tafel plots using three-electrode potentiostat. The deposited films were examined by FTIR, Raman, XRD, SEM, and AFM techniques; they revealed high percentages of conversion to the few layers of graphene with confirmed defects.
Highlights
Graphene has attracted extreme interest in the industrial and scientific community since the experimental realization of graphene in 2004 [1], for many reasons; graphene has the highest electronic conductivity at room temperature; and it is only one monoatomic layer thick and almost transparent; it is durable and at the same time flexible; it is chemically inert and impermeable to most gasses
This study focused on the chemical synthesis and deposit of well-adhered graphene coating to shield carbon steel for enhancing the corrosion protection
Graphene oxide was synthesized from graphite flakes by Hummers Jr. and Offeman method [15], graphite (1.0 g) (Mesh100, Sigma-Aldrich, USA)
Summary
Graphene has attracted extreme interest in the industrial and scientific community since the experimental realization of graphene in 2004 [1], for many reasons; graphene has the highest electronic conductivity at room temperature; and it is only one monoatomic layer thick and almost transparent; it is durable and at the same time flexible; it is chemically inert and impermeable to most gasses. The chemical inertness and impermeability towards most gasses in combination with its strength and single atomic layer thickness make it a fascinating candidate for coating purposes, for anticorrosion coatings; a new and better protecting material has been sought intensively [2, 3]. Graphene as nanosheets and nanoplatelets and functionalized graphene can be prepared by various methods such as chemical vapor deposition, chemical or mechanical exfoliation, and cleavage and annealing a single-crystal SiC [4,5,6,7,8]. Most of these methods need high energy requirement with low production yield. The test serves to deduce the corrosion inhibition ability of the graphene
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