Cuminum Cyminum Extract- A Green Corrosion Inhibitor of S300 Steel in 1 M HCl

The corrosion inhibition of steel S300 in 1M HCl by Extracts of Cuminum cyminum was investigated by using weight loss measurements, Potentiodynamic Polarization Curves and Electrochemical Impedance Spectroscopy (EIS). The polarization Curves reveal that extracts of C. cyminum is a mixed-type inhibitor. The results show that the inhibition efficiency increases with the increasing of extract concentration to reach 97.49 % at 1. 3 g/l and decreases with temperature. Cumin extract is adsorbed on the steel surface according Langmuir isotherm. The adsorption parameters, enthalpy and activation energy were determined. The effect of temperature was studied and discussed. Keywords: Cumin, steel, Corrosion, inhibition

Fabrication of TiO2 Nanotube by Electrochemical Anodization: Toward Photocatalytic Application

In this study, a self-organized nanotubular titanium dioxide (TiO2) array was successfully produced by anodizing pure titanium in a mixture of glycerol, distilled water (8% vol.), and ammonium fluoride using a dual electrode system. The size control and distribution of the nanopores were performed in a DC voltage range varying from 30 V to 60 V. The diameter of TiO2 nanopores varies from 59 to 128 nm depending on the anodizing voltage. Energy-dispersive X-ray spectroscopy (EDX) analysis reveals that the as-prepared films are essentially composed of TiO2. According to the X-ray diffraction (XRD) and Raman spectroscopy analysis, the nanotubular arrays of TiO2 annealed at 600°C for 2 hours are composed of a phase mixture of anatase and rutile. Mott-Schottky analysis showed that the TiO2 nanotubes are consistent with an n-type semiconductor with a donor density of about 1017 cm-3. Preliminary results on the photocatalytic degradation of a pharmaceutical pollutant showed that the TiO2 nanotubes can be used as a promising material for application in wastewater treatment