TY - JOUR
T1 - Spectroscopic investigation of improved corrosion resistance of nickel due to multilayer graphene coating developed with suitably tilted substrate during CVD
AU - Arya, Abhishek Kumar
AU - Raman, R. K.Singh
AU - Parmar, Rahul
AU - Amati, Matteo
AU - Gregoratti, Luca
AU - Saxena, Sumit
N1 - Funding Information:
One of the authors, Abhishek Kumar Arya, would like to thank Department of Mechanical & Aerospace Engineering, Monash University, IITB-Monash Research Academy and Monash Graduate School for providing the scholarships for pursuing PhD. Authors acknowledge the Monash University's Department of Chemical & Biological Engineering for providing the access for SEM facility, and School of Chemistry for access to Raman spectroscopy facility. Authors also acknowledge the Escamicroscopy beamline at Elettra-Sincrotrone Trieste S.C.p.A for SPEM characterisation.
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/11/5
Y1 - 2022/11/5
N2 - The great variability (from remarkable to little) in graphene's ability as a corrosion barrier coating is attributed to the extent of defects and non-uniformity of graphene. This study established the theoretical basis for tailoring the orientation of the metallic substrate with respect to the direction of flow of the incoming precursor gas into the reactor during the chemical vapour deposition (CVD) of uniform graphene film on the substrate. We validated the theoretical basis by demonstration of development of a multilayer graphene coating with considerably improved uniformity and low defect content on a suitably tilted nickel substrate during CVD that provided an effective and durable corrosion resistance to the metal in an aggressive acidic medium. Thorough scanning X-ray photoemission microscopy (SPEM) using synchrotron radiation and Raman spectroscopy enabled the mechanistic understanding of the improved uniformity and low defect content of graphene coating, and their role in considerably improving the corrosion resistance of nickel.
AB - The great variability (from remarkable to little) in graphene's ability as a corrosion barrier coating is attributed to the extent of defects and non-uniformity of graphene. This study established the theoretical basis for tailoring the orientation of the metallic substrate with respect to the direction of flow of the incoming precursor gas into the reactor during the chemical vapour deposition (CVD) of uniform graphene film on the substrate. We validated the theoretical basis by demonstration of development of a multilayer graphene coating with considerably improved uniformity and low defect content on a suitably tilted nickel substrate during CVD that provided an effective and durable corrosion resistance to the metal in an aggressive acidic medium. Thorough scanning X-ray photoemission microscopy (SPEM) using synchrotron radiation and Raman spectroscopy enabled the mechanistic understanding of the improved uniformity and low defect content of graphene coating, and their role in considerably improving the corrosion resistance of nickel.
KW - Corrosion protection
KW - Electrochemical impedance spectroscopy
KW - Potentiodynamic polarisation
KW - Raman spectroscopy
KW - Scanning X-ray photoelectron microscopy
KW - Substrate orientation during CVD
UR - http://www.scopus.com/inward/record.url?scp=85136581522&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2022.08.054
DO - 10.1016/j.carbon.2022.08.054
M3 - Article
AN - SCOPUS:85136581522
SN - 0008-6223
VL - 200
SP - 215
EP - 226
JO - Carbon
JF - Carbon
ER -