Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : thiourea

The Inhibition of Corrosion for Metal Matrix Composites Reinforced with Nano Alumina in Al–Fao Water by Thiourea

Mohammed Saieed Waheed; Niveen J. Abdalkadir

Engineering and Technology Journal, 2015, Volume 33, Issue 8, Pages 1445-1457

In the present investigation, the static electrochemical corrosion behavior of nano (Al2O3)P based aluminum in Al –Fao water with and without inhibitor was compared. The nanocomposites were fabricated by using liquid metallurgy technique. The effect of inhibitors for nanoparticulates weight percentage on the corrosion rate was studied. The corrosion rate was increased by increasing weight percentage of the nanoparticles, the Al/ 5% nano (Al2O3)P composites exhibited the highest corrosion resistance among all the investigated nanocomposites with and without inhibitors. The obtained results signified that the mechanism of adsorption of thiourea molecules on the MMC surface was by physisorption.

Removal of Phenol Pollutants by Modification Molecular Sieves 13X

Laith S. Sabri; Jabir Shanshool

Engineering and Technology Journal, 2009, Volume 27, Issue 15, Pages 2853-2862

Molecular sieves type 13X was modified by treatment with saturated solution of urea or thiourea and adding of sodium silicate as binder to give homogeneous admixture in approximate weight percent, 20% urea or thiourea, 30% binder, and 50% MS13X. The samples were dried and shaped in cylindrical particles of about 5mm diameter and 4-8mm length. The FTIR studies show some interaction between the added urea and thiourea with the original substrates. These are mainly hydrogen band type interactions through –NH2 moiety with –OH group of framework oxygen in
the substrate or with adsorbed water. The urea displayed more significant interaction with MS13X than thiourea. Molecular sieve 13X and its admixtures with urea and thiourea showed good ability to remove phenol from water. The urea modified sample, which has the largest surface area, was the best adsorbent for phenol followed by thiourea treated sample. Excellent degree of phenol removal, greater than
98% was achieved by using 0.2 l/h flow rate of 10ppm phenolic solution and 56cm bed length at 300C. The increasing of inlet phenol concentration in water affected largely the driving force and the rate of adsorption, resulted also in higher capacities. While the percentage removal of phenol was decreased by fixed other operating conditions