Scopus Research — Dr. Khalid Omran Ali

With the advancement of science and technology and the construction of metal-based composites (MMC), it became possible to achieve improved properties that were not easily available in an alloy. In fact, with the emergence of such technology, manufacturers were able to adjust the resulting materials according to their needs in such a way as to provide mechanical strength, hardness, corrosion resistance, or other desired properties. These composites were used in various aerospace, automotive, construction, and production industries. Aluminum-based composites are among the structures that have taken an important place in the industry due to their lightweight and high strength. The present study produced bi-alloy aluminum-based 1060/5083 composites fabricated with alumina particles with a Hot ARBp at T = 380 °C. Also, the effect of rolling steps on the roll bonding mechanism is investigated using numerical simulation. As the novelty of this study and for the first time, a bi-alloy 1050/5083 composites reinforced Al2O3 particles via ARB process have been produced and then, potential dynamic polarization in 3.5 Wt% NaCl solution was used to study the corrosion properties of these composites. The corrosion behavior of these samples was compared and studied with that of the annealed aluminum. The study aimed to investigate the bonding behavior between the bi-alloy layers. So, as a result of enhancing influence on the number of ARBp, this experimental investigation revealed a significant enhancement in the main electrochemical parameters and the inert character of the Alumina particles. Reducing the active zones of the material surfaces could delay the corrosion process. Results showed that the corrosion resistance of the sample fabricated after six steps improved more than 100 % in comparison with the initial annealed Al alloy. Also, the average peeling force improved from 45 N to 94 N for the sample fabricated with six steps. Moreover, at a higher number of steps, the corrosion of MMC improved. Moreover, increasing the number of ARBsteps illustrated an improvement in the wear resistance of samples. Finally, the samples' bonding interface, corrosion surface, and peeled surface were investigated using scanning electron microscopy (SEM). © 2024 Elsevier B.V.

In this study, the corrosion behavior of carbon steel metal was studied under certain conditions. The experiments were carried out under different conditions, including three temperatures (20, 40, and 60℃) in a 3.5% NaCl solution. The corrosion of carbon steel in 3.5% NaCl solution was inhibited using three concentrations of tree gum: 0, 1, and 3 g. The experiments were performed using polarization and weight loss methods. The results confirmed that the corrosion potential became more negative when the temperature was increased, which led to an enhancement in the corrosion rate. However, an increase in the concentration of the corrosion inhibitor caused the potential to become more positive and reduce the corrosion rate. In conclusion, the inhibition efficacy was close to 90% using the tree-gum inhibitor in a saline medium. ©2024 The authors.

Electrocoagulation (EC) can be defined a method utilized to remove pollutants from wastewater by applying an electric current to sacrificial electrodes. Many experimental variables like NaCl content (0–4 g/l), current density (5–25 mA/cm2), time (30–90 mins), and pH (4–10) that influence the removal efficiency regarding COD were considered. In the presented research, three distinct configurations related to electrodes, i.e. Al-Al, Fe-Al, and Fe-Fe, have been utilized to determine which was the most effective. RSM depending on BBD was utilized for optimizing various operational parameters with regard to HWW by use of EC. Maximum COD removal (97.9%) was reached at Fe-Al electrodes, NaCl (3.2 g/l), current density (24.7 mA/cm2), time (81.7 mins), and pH (7.4). COD removal (91.3%) was achieved at the Al-Al electrodes, NaCl (3.8 g/l), current density(23.5 mA/cm2), time-86.3 min, and Ph (7.7). At the Fe-Fe electrodes, the removal of COD (89.5%) was obtained at NaCl (2.3 g/l), current density (24.6 mA/cm2), pH 8.5, and time (86.9 min). This indicates that EC could remove pollutants from different types of wastewaters under many operating parameters and with arrangements of electrodes © 2023,Journal of Ecological Engineering.All Rights Reserved.

Since the human body is one of the highly aggressive environments, the materials utilized for an implant should have high resistance to degradation and corrosion. One of the commonly used biomaterials in medicine is copper (Cu). The Cu corrosion can result in the release of ions in the body with high toxicity, thereby causing inflammatory diseases. Based on the literature, as biomolecules, amino acids act as a corrosion inhibitor in aggressive solutions. The current work aims at scrutinizing the inhibition impact of L-arginine (L-Arg) and L-Valine (L-Val), which have been rarely investigated, upon the corrosion process of Cu. We undertook density functional theory computations to scrutinize the inhibitory impact of L-Arg and L-Val as well as their conformers upon Cu corrosion. Also, we scrutinized the computed parameters according to the back donation of electrons between Cu and the inhibitors, transported electron fraction, energy gap, softness, hardness, EHOMO, and ELUMO. According to the theoretical indices of L-Arg, it prefers adsorption. We examined the inhibitory efficiency of L-Arg against corrosion and found that it is a promising inhibitor. © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

The removal of chromium ions was given attention because it was a dangerous pollutant to the environment. The chromium ions wastewater was studied by electrocoagulation method. In this research details with the influence of some variables on the removal of chromium ions using electrochemical technique. The test system was electrochemical reactor to know value of the chromium ions concentrations in wastewater to calculate its removal efficiency. The performance of the batch reactor for the chromium ion removal was determined by changing the values of voltage, temperature and chromium ion concentrations, where the behavior of the aluminum electrodes after the removal process. An aluminum electrodes are used in the electrocoagulation method for removal of chromium ions and an electrochemical system was designed to test three major factors that affect the removal process; applied voltage 10, 20 and 30v, temperatures 20, 30, 40 and 50°C, current density 0.5, 1.5, 3 and 5 mA/cm2 and pH is 1, 4, 7, 10 and 12. In this study, the removal efficiency increases with the increasing of the applied voltage and current density (i) also the results showed that the efficacy of removal increased with increasing temperature but increased with increasing pH it at low pH values 1 to 7 and then decreased with increasing pH at high pH values 7 to 12. The results also show that the energy consumed increases with the increase in the reaction time, the maximum removal efficiency is 94.5 at T = 50°C, v = 40 volts, pH = 7 and i = 5 mA/cm2 © 2023 AIP Publishing LLC.

In this study, we aimed to increase the knowledge regarding the response mechanisms which were associated with the formation of CdS thin films. CdS thin film remains the most appealing alternative for many researchers, as it has been a capable buffer material for effect in film based polycrystalline solar cells (CdTe, CIGSe, CZTS). The Linker Assisted and Chemical Bath Deposition (LA-CBD) technique, which combines the Linker Assisted (LA) technique and the chemical bath deposition (CBD) method for forming high quality CdS thin film, was presented as an efficient and novel hybrid sensitization technique. CdS films were bound to soda lime with the help of electrostatic forces, which led to the formation of the intermediate complexes [Cd (NH3)4]2+ that helped in the collision of these complexes with a soda lime slide. Salvia dye and as a linker molecule 3-Mercaptopropionic acid (MPA) was used in the one step fabrication technique. Optical results showed that the bandgap varied in the range of (2.50 to 2.17) eV. Morphological properties showed a homogeneous distribution of the particles that aspherical in shape in the CdS + MPA + Salvia dye films. This technique significantly affected on the electrical characterizations of CdS films after the annealing process. The CdS + Ag + MPA + Salvia dye films showed the maximum carrier concentration and minimum resistivity, as 5.64 × 10 18 cm−3 and 0.83 Ω cm respectively. © 2022, The Author(s).