CVD Graphene coating on metals for corrosion resistance:
Optimizing carbon precursor flow rate for durable barrier properties
c)
Cu disc/Gr 1.6 sccm
Cu disc/Gr 0.4 sccm
d)
Intensity
Ø  Exceptionally inert and impermeable nature
of Graphene: Ideal coating for
corrosion resistance.
b)
a)
IG/I2D=2.3
7-8 layers
IG/I2D=1.4
3-4 layers
IG/I2D=1.4
3-4 layers
0
e)
Cu disc/Gr 1.6 sccm
Cu disc/Gr 0.8 sccm
Cu disc/Gr 0.4 sccm
Annealed Cu disc
f)
Bare Cu disc
LeadScien*st
Prof.RamanSingh
DepartmentofMechanical&
AerospaceEngineering
DepartmentofChemicalEngineering
MonashUniversity
+61399053671
raman.singh@monash.edu
Cu disc/gr 0.4 sccm
Annealed copper disc
0.2
10000
0
1000
-0.1
-0.2
100
-0.3
10
0.01
-0.4
0.1
1
10 100 1000 10000
-0.5
Frequency (Hz)
Applica*ons
Potential of
Exceptionally
Durable
Corrosion
Protection:
Graphene
Coating
-8.5
3000
(a)-(c): SEM images
of graphene-coated on
Cu with different flow
rates of n-hexane : (a)
0.4, (b) 0.8, (c) 1.6
sccm
(d) Raman spectra
confirming graphene
coating at different
flow rates.
0.1
ResearchExper*se
KeyContact
Cu disc/Gr 0.8 sccm
0.3
Prof.RamanSingh
§  CorrosionandAdvanced
Environment-friendly
Coa*ngs
§  Advanced
Electrochemical
Characteriza*onof
Corrosion
§  SurfaceCharacteriza*on
§  CVDGrapheneCoa*ng
onMetals
§  ElectronMicroscopy
Cu disc/Gr1.6 sccm
Poten1al(V)vsSCE
Ø  We can optimize the key factors governing
quality of graphene developed by chemical
vapour deposition (CVD):
carbon
precursor flow rate, growth temperature,
hydrogen flow rate.
1000
2000
Raman Shift (cm-1)
Bare Copper disc
100000
|Z| (Ω cm2)
Ø  Challenge: To develop pristine coating of
graphene on metals that provides full
coverage and is defects-free.
Cu disc/Gr .8 sccm
Annealed Cu disc
-7.5
-6.5
logi(A/cm2)
-5.5
-4.5
-3.5
-2.5
(e) EIS Bode plots and
(f) potentiodynamic
polarization plots
comparing corrosion
resistance of bare and
annealed Cu with
graphene coating
developed on Cu at
different flow rates of
n-hexane.
ResearchFacili*es
Graphenesynthesisset-up-
tubularCVDreactor.
RenishawinViaRaman
microscopy
ScanningElectronMicroscopy
XRD-Rigakuminiflex600
Electrochemicalcorrosiontes*ng