In this work, the corrosion resistance and antibacterial properties of Graphene Oxide were investigated. Hummer’s method was used for production of Graphene Oxide on AISI 304 stainless steel, and its formation was tested by Raman spectroscopy. Electrochemical Impedance spectroscopy (EIS) and Polarization tests in 3. 5% NaCl solution were carried out for corrosion inhibition studies of the produced samples. Results of corrosion measurements revealed that coating of GrapheneOxide on stainless steel greatly improves its corrosion resistance. Surface morphology of the samples after corrosion tests was examined by scanning electron microscope analysis (SEM). The equivalent circuit of all samples was obtained, using the EIS data. Japanese Industry Standard test Methods was used for antibacterial properties investigation against gram negative E. coli bacteria. The results of antibacterial analysis showed that Graphene Oxide with anti-corrosion property, is promising material for antibacterial applications.

In this work, the corrosion resistance and antibacterial properties of Graphene Oxide were investigated. Hummer’s method was used for production of Graphene Oxide on AISI 304 stainless steel, and its formation was tested by Raman spectroscopy. Electrochemical Impedance spectroscopy (EIS) and Polarization tests in 3. 5% NaCl solution were carried out for corrosion inhibition studies of the produced samples. Results of corrosion measurements revealed that coating of GrapheneOxide on stainless steel greatly improves its corrosion resistance. Surface morphology of the samples after corrosion tests was examined by scanning electron microscope analysis (SEM). The equivalent circuit of all samples was obtained, using the EIS data. Japanese Industry Standard test Methods was used for antibacterial properties investigation against gram negative E. coli bacteria. The results of antibacterial analysis showed that Graphene Oxide with anti-corrosion property, is promising material for antibacterial applications.

Two triphenylimidazole substituted compounds, namely 2, 4, 5-triphenyl-4, 5-dihydro-1H-imidazole (P1) and 2-(4, 5-diphenyl-4, 5-dihydro-1H-imidazol-2-yl)phenol (P2) were studied as inhibitors for the corrosion of carbon steel in 1. 0 M hydrochloric acid (HCl) solution has been examined and characterized by weight loss, Tafel polarization and electrochemical impedance spectroscopy (EIS). It was found that the studied compounds exhibit a very good performance as inhibitors for carbon steel corrosion in 1. 0 M HCl. Results show that the inhibition efficiency increases with decreasing temperature and increasing concentration of inhibitors. Good agreement between the results obtained from weight loss and electrochemical measurements. It has been determined that the adsorption for the studied inhibitors on carbon steel complies with the Langmuir adsorption isotherm at all studied temperatures. The kinetic and thermodynamic parameters for carbon steel corrosion and inhibitor adsorption, respectively, were determined and discussed. On the bases of thermodynamic adsorption parameters, comprehensive adsorption (physisorption and chemisorption) for the studied inhibitors on mild steel surface was suggested. Results show that the order of inhibition efficiency is P2>P1 due to presence of electron donating hydroxyl (− OH) groups in P2. Potentiodynamic polarization studies have shown that compounds studies acts as a mixed type of inhibitor’ s. Scanning electron microscopy (SEM) was performed and discussed for surface study of uninhibited and inhibited carbon steel samples.

Quantum chemical calculations via B3LYP/6-31G(d. p) level were carried out on 2, 4, 5-triphenyl-4, 5-dihydro-1H-imidazole (P1) and 2-(4, 5-diphenyl-4, 5-dihydro-1H-imidazol-2-yl)phenol (P2) which were used as corrosion inhibitors for carbon steel in acidic media. The parameters like HOMO and LUMO energies, energy band gap, dipole moment, chemical potential (μ ), chemical hardness (ղ ) and global nucleophilicity (ɷ ) were calculated and argued in relation to the observed inhibitory efficiency for the studied compounds. Also, the effect of hydroxyl group substituent on the operation of corrosion inhibition of Triphenylimidazole derivatives was observed.

In this article, a simple method was applied to polymerize carbon base compounds such as graphite, graphite oxide, carbon active, and cellulose. The polymerization was based on self-aldol condensation of acetone in acid media. Acid-modified carbon compounds act as a substrate to initiate the condensation reaction. This reaction is influenced by the time of condensation, temperature, and acetone:acid ratio. Their equal ratio causes crystallization of carbon compounds. The polymer is obtained by increasing the ratio. Photographs and results obtained from Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray (EDX) analysis, and thermal analysis shows the differences that have appeared due to polymerization. The intensity of 2967 cm-1 peak in FT-IR spectra that is attributed to C-H bonds with sp3 hybridization significantly increased after the polymerization of graphite and carbon active. The thermal analysis shows the gradual weight loss for polymers as the polymer loses the monomer one by one. These polymers, similar to bitumen, are sticky and non-conductive as can be seen in the Tafel diagram. The corrosion resistance of metal coated with graphite polymer using weightless measurements, showed that these polymers could be used as an anti-corrosion coating.