Du X.,Technical institute
International Journal of Applied Environmental Sciences | Year: 2013
This paper based on the previous findings, orthogonally compounds three inhibitors of cerium chloride, lanthanum chloride and 8-hydroxyquinoline to study the corrosion inhibition effect of compound corrosion inhibitor on 2024 aluminum alloy for crevice corrosion in seawater. It can determine the optimal compound corrosion inhibitor formulations by observations on corrosion morphology and chemical immersion, polarization curve fitting, AC impedance as well as x-EDS analysis, and then analyzes its synergistic effect and inhibition mechanism. The results show that inhibition rate of compound corrosion inhibitor is better than single inhibitor. When the concentration of matching cerium chloride, lanthanum chloride and 8-hydroxyquinoline is respectively 1.0g/L, 1.5g/Land 0.02g/L, the rate is the highest reaching 90.52% and the crevice corrosion sensitivity is greatly reduced. This is because the adsorption of 8-hydroxyquinoline which can adsorb in areas of weaker cerium and lanthanum corrosion scales, allowing uniform and close scale, further enhancing the performance of anticorrosion of aluminum. Therefore, this compound corrosion inhibitor has a broad applicability which can be used by aluminum in seawater as corrosion inhibitor. © Research India Publications.
Yahya L.S.,Technical institute |
Saleem T.M.,University of Mosul |
Hasan B.M.,University of Mosul
Journal of Engineering and Applied Sciences | Year: 2012
In this study, neuro based intelligent methods for electrical motors'sound recognition system are proposed. The sound signals were used to recognize the loads speed and fault diagnosis of the motors. The sound signals were processed by two separate methods, the FFT and Discrete Wavelet Transform (DWT). The results of both methods were compared to obtain the most suitable of them. © Medwell Journals, 2012.
Goudarzian N.,Islamic Azad University at Shiraz |
Gholinejad M.,Shiraz University |
Ghahramani P.,Technical institute
Journal of Chemical Sciences | Year: 2011
In this report, Suzuki-Miyaura coupling reaction was performed in the presence of polyethyleneimine (PEI) as ligand, NiCl2·6H 2O and K2CO3 in ethylene glycol at 80-100°C under phosphinefree conditions. By this method, structurally different aryl bromides and iodides were reacted with phenylboronic acid and potassium phenyltrifluoroborate. Under these simple reaction conditions a different iaryl derivatives have been prepared in high to excellent yields. Recycling experiments showed that catalyst can be used as recyclable catalyst in the Suzuki-Miyaura cross-coupling reactions. © Indian Academy of Sciences.
Budzik G.,Rzeszow University of Technology |
Cygnar M.,Technical institute |
Marciniak-Podsadna L.,Poznan University of Technology |
Grzelka M.,Poznan University of Technology |
And 2 more authors.
Tehnicki Vjesnik | Year: 2014
The article presents simulation researches on the combustion process in the four-cylinder testing engine, based on the spark ignition engine Toyota Yaris 1,3 dm3 which was equipped with two systems of power supply i.e.: fundamental and ignition. Two methods of initiating the combustion process were applied: by spark ignition and, after it was turned off, by means of the ignition dose injection. The researches aimed at revealing the differences in the combustion process and engine performance, above all the changes in pressure that occurred in the cylinder for that kind of two-fuel power supply of the engine. The ignition dose injected into the cylinder was equal to about 5 ÷ 8% of the general mass of the fuel supplied to the engine. The mass of the fuel injected into the approach collector determined the remaining part, and the direct injection of the fuel took place over several dozen of rotation degrees of the crankshaft before TDC (Top Dead Centre). A spatial grid of the engine's model (pre-processor) was prepared, and also a modification to the source KIVA 3V program was made consisting in taking into account of two systems of injection. It is necessary to mention that the standard KIVA 3V program contains, as a default, only one source of fuel injection.
Al-Obaidi F.A.,University of Baghdad |
Al-Shadeedi S.M.J.,University of Baghdad |
Al-Dalawi R.H.,Technical institute
International Journal of Poultry Science | Year: 2011
The objective of this study was to determine the shelf life of marketed table eggs in some retail stores of Baghdad city through determination some quality, chemical and microbial characteristics of the eggs. A total of 1680 chicken eggs (10 eggs were locally produced and 10 eggs were imported) were collected biweekly from retail stores in different seven popular regions of Baghdad city during the period from January 14th to July 15th of 2010. The data obtained revealed that locally produced eggs had lower egg weight, albumen weight and albumen height and higher albumen and yolk pH compared with imported, also Psychrophilic, Coliform, Staphylococci and Fungi counts were high in locally produced eggs compared with imported. No significant differences between locally and imported eggs chemical composition except moisture which was significantly (p<0.05) higher in imported eggs. The total percentage of the incidence of Salmonella in table eggs at retail stores in Baghdad were 20.0% and 38.7% for locally and imported eggs respectively. This survey showed that marketed table eggs in retail stores of Baghdad city were of good quality and within the Iraq standard specification for eggs and where fit for consumption as shell eggs. © Asian Network for Scientific Information, 2011.