Hassan, H. B., A. M. A. Rahim, M. W. Khalil, and R. F. Mohammed, "Ni Modified MCM-41 as a Catalyst for Direct Methanol Fuel Cells", Int. J. Electrochem. Sci., vol. 9, pp. 760 - 777, 2014. 20._ni_modified_mcm-41_as_a_catalyst_for_direct_methanol_fuel_cells.pdf
Rahim, M. A. A., M. M. Ismail, and A. A. M. Mageed, "Production of Activated Carbon and Precipitated White Nanosilica from Rice Husk Ash", Ahmed M. Abdel Mageed, vol. 3, issue 2, pp. 491-498, 2015. production_of_activated_carbon_and_precipitated_white_nanosilica_from_rice_husk_ash.pdf
Rahim, A. M. A., A. A. A. Rahman, and M. W. Khalil, "Charge Transfer Reactions on Oxide-Covered Ti Electrodes: Effect of Dielectric Constant Variation and Oxide Stabilization", Materialwissenschaft und Werkstofftechnik, vol. 27, pp. 438-443, 1996. Abstract

The electron transfer kinetics of the Fe3+/Fe2+ redox couple on the oxide covered Ti electrodes were investigated as a function of the film thickness, film stabilization, and concentration of the redox species. The oxides were formed potentiodynamically in acidic solution of pH=3 (Na2SO4+H2SO4) at a scan rate of 1 mV s−1. The cathodic and anodic Tafel lines were also measured at the same scan rate.

The logarithm of the exchange current density i0 shows an exponential decrease with the oxide film thickness. Direct tunnelling may explain the kinetics of the reaction across thin Ti02 (oxide formed at the potential region before the O2-evolution). Values of the cathodic and anodic transfer coefficients are tabulated. It was found that, the stabilization of the oxide could possibly increase its conductivity. The electron transfer reaction showed a first order dependence on the redox species concentration, independent of the conditions of oxide film formation.

Rahim, A. M. A., A. A. ABDEL RAHMAN, and M. W. Khalil, "Anion incorporation and its effect on the dielectric constant and growth rate of zirconium oxides", JOURNAL OF APPLIED ELECTROCHEMISTRY , vol. 26, issue 10, pp. 1037-1043, 1996. AbstractCU-PDF

Mechanically polished zirconium electrodes were potentiodynamically polarized in phosphate buffer solutions of various pH values and in 0.5 lvl NaOH. The results show that the shape of the I-E curves is independent of the solution pH. At relatively low scan rates, oxygen gas evolution was observed. The oxide film thickness was calculated from the values of the charge consumed in the anodic process assuming 100% current efficiency for oxide formation below oxygen evolution (lower values for the current efficiency are assumed for potentials above oxygen evolution). Capacitance measurements, together with the calculated oxide thickness, were used to estimate values for the dielectric constant of the oxide. Two different values of the dielectric constant were obtained for the oxides formed in the range of potential below and above oxygen evolution. Also, higher dielectric constant values were obtained with increasing solution pH. Anion incorporation was assumed to increase the conductivity of the oxide films and, hence, decrease the dielectric constant. A two-layer structure is proposed for the anodically formed oxide on zirconium in aqueous solutions; an anion-free layer near the metal and an outer layer containing the incorporated anions.

Rahim, A. M. A., H. B. Hassan, and M. W. Khalil, "Naturally Occurring Organic Substances as Corrosion Inhibitors for mild Steel in Acid Medium: Concentration and Temperature Effects", Mat.-wiss., u. Werkstofftech. , vol. 28, pp. 198-204, 1997. Abstract

Potentiodynamic cathodic and anodic polarization technique was used to study the effect of some common amino acids concentration on the corrosion inhibition of mild steel in H2SO4. A value of 1.0 × 10−4 M represents a critical concentration, for the aliphatic amino acids, above which the corrosion rate increases. The increase of the sulphur-containing amino acids concentration largely decreases the corrosion rate. A mono-layer adsorption of the amino acid molecules on the metal surface was proposed with the adsorption behaviour following the Temkin isotherm at 30°C.

The effect of temperature on the corrosion inhibition of amino acids was also studied over the temperature range 25 to 60°C. Values of the apparent activation energy in the range of 42 - 49 kJ mol−1 were estimated for the steel corrosion in the inhibited acid solutions.

Rahim, A. M. A., H. B. Hassan, and M. W. Khali, "Naturally Occurring Organic Substances as Corrosion Inhibitors for Mild Steel in Acid Medium", Materialwissenschaft und Werkstofftechnik, vol. 28, pp. 98-102, 1997. Abstract

Potentiodynamic cathodic and anodic polarization technique was used to study the effect of some common amino acids concentration on the corrosion inhibition of mild steel in H2SO4. A value of 1.0 × 10−4 M represents a critical concentration, for the aliphatic amino acids, above which the corrosion rate increases. The increase of the sulphur-containing amino acids concentration largely decreases the corrosion rate. A mono-layer adsorption of the amino acid molecules on the metal surface was proposed with the adsorption behaviour following the Temkin isotherm at 30°C.

The effect of temperature on the corrosion inhibition of amino acids was also studied over the temperature range 25 to 60°C. Values of the apparent activation energy in the range of 42 - 49 kJ mol−1 were estimated for the steel corrosion in the inhibited acid solutions.