Corrosion resistance of graphene directly and locally grown on bulk nickel substrate by laser irradiation

Abstract

ARTICLE This journal is ARTICLE This journal isWe report the anticorrosion capability of graphene directly and locally grown on bulk nickel substrate by a high power laser beam at room temperature. The anticorrosive performance of the locally laser-grown graphene on Ni, together with Ni covered graphene transferred from CVD method and bare Ni, was investigated by electrochemical measurements and immersion tests. The corrosion rate evaluated from potentiodynamic polarizations was 4.5 times lower than that for bare Ni, and the corrosion potential was increased by 126 mV. Electrochemical impedance spectroscopy (EIS) measurements complemented the potentiodynamic results and indicated significant improvement in corrosion resistance in the presence of in-situ grown graphene. The in-situ grown graphene could protect the underlying substrate effectively, mainly due to its strong interaction with substrate, and excellent barrier properties. This laser fabrication of graphene directly and locally on bulk substrate provides a promising and workable method to protect the metals from corrosion.

Tubular graphene architectures at the macroscopic scale: fabrication and properties

“…with those of the bare Ni, implying that the graphene/Ni samples effectively resisted the HCl and KOH corrosive environments. 23,24 In a 1 M KOH solution, the corrosion current density of a grown graphene sample was smaller than that of bare Ni, indicating that graphene has superior corrosion resistance in a basic environment. The anticorrosion mechanism of the graphene/Ni sample may have been due to the impermeability of the graphene.…”

Recent advancements in corrosion inhibitor systems through carbon allotropes: Past, present, and future

“…11 Ni/ 0.5 M HCl Corrosion rate of graphene coated Ni was 4.5 times lower than bare Ni. [110] 12 Carbon steel) 3.5% NaCl Corrosion rate for graphene coated carbon steel was much lesser (0.05 mm per year) as compared to the non-coated carbon steel (0.09 mm per year). [111] 13 Stainless steel, Cu, Ni, and CuNi…”

Challenges for continuous graphene as a corrosion barrier

“…Later studies confirmed that graphene coatings grown directly on a metal outperform mechanically transferred graphene (Mišković-Stanković et al, 2014). Besides the damage inflicted to graphene by the mechanical transfer, the problem with transferred graphene coatings is the weak adhesion to the target metal surface, which, over time, causes delamination of the coating (Ye et al, 2015). This is partially due to the intrinsic surface roughness of the target subject; the smoother the surface, the stronger the adhesion with the graphene sheet.…”