Fabrication and characterization of graphene-based carbon hollow spheres for encapsulation of organic corrosion inhibitors

Abstract

In this work, we synthesized carbon hollow spheres (CHSs) using the silica templating method, encapsulated 2-mercaptobenzimidazole (MBI) inhibitor in the CHSs and evaluated their corrosion inhibition performance upon exposure of mild steel to a saline solution containing the released inhibitor. The effects of silica template surface modification on the CHS structure was evaluated, while the structure and morphology of the synthesized CHS was analyzed using field emission scanning electron microscope (FE-SEM), transmission electron microscope (TEM), Raman spectroscopy and X-ray diffraction (XRD) spectroscopy. Furthermore, thermogravimetric analysis (TGA), energy-dispersive X-ray spectroscopy mapping (EDS-mapping) and UV-vis were employed to evaluate the MBI release from carbon capsules at different pH values. Corrosion protection performance of the doped CHS was evaluated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The results showed tunability of the shell structure between an amorphous carbon and graphene structure using surface modification of the silica templates. Moreover, the MBI release from the CHSs showed to be pH-dependent allowing smart protection of mild steel when exposed to corrosive conditions.

SiO2‐covered graphene oxide nanohybrids for in situ preparation of UHMWPE/GO(SiO2) nanocomposites with superior mechanical and tribological properties

“…Furthermore, the depicted absorbance bonds including the bending vibration of NH 2 (3273 cm −1 ), asymmetric vibration, and bending vibration of the SiOSi network (1120 and 614 cm −1 ) and SiOH (1073 cm −1 ) shown in Figure (c) confirm the presence of silane molecules grafted on the GO nanosheets surface …”

“…For GO nanosheets and GO(SiO 2 ) nanohybrids, the interlayer spacing was calculated by Bragg law as presented in eq. where λ is the wavelength (λ = 1.54 Å) and θ is the position of the main peak.…”

Recently Emerging Nanotechnological Advancements in Polymer Nanocomposite Coatings for Anti-corrosion, Anti-fouling and Self-healing

“…Hence, these leaves demonstrate high super-hydrophobicity. Various techniques such as chemical deposition [65] , casting, and chemical etching [66] , sol-gel procedure [67] , photo-lithography [68] , plasma modification [69] , templating [70] , and chemical vapor deposition (CVD) [71] , have undergone utilization in fabricating super-hydrophobic surfaces. Numerous investigations have demonstrated application of polymeric matrices, and PNCs in fabricating hydrophobic/superhydrophobic surfaces [72] , [73] , [74] , [75] .…”

Coconut Water as Organic Inhibitor on Corrosion of Low Carbon Steel in 3.5% NaCl Solution

“…During the last century, low-carbon steel has been widely used in construction, manufacturing, marine and diverse areas of other industrial and engineering purposes. However, increasing resistance corrosion of low-carbon steel in a corrosive environment is challenging [1]. Cathodic protection and addition of a wide variety of the corrosion inhibitors are the basic techniques used to protect steel structure from corrosion [2].…”