University of Daiyla

Iraq

University of Daiyla

Iraq
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Yaro A.S.,University of Baghdad | Khadom A.A.,University of Daiyla | Ibraheem H.F.,University of Baghdad
Anti-Corrosion Methods and Materials | Year: 2011

Purpose: The aim of this paper is to investigate peach juice as a cheap, raw, green and non-toxic anti-corrosion material for mild steel corrosion in hydrochloric acid at different temperatures. Design/methodology/approach: The corrosion inhibition of mild steel in 1 M HCl solution in the presence of peach juice at temperature range of 30-60°C and concentration range of 5-50 cm3/l was studied using weight loss and polarization techniques. The inhibition effect, adsorption characteristics, mathematical and electrochemical modeling of peach juice were addressed. Findings: Results show that inhibition efficiency rose with the increase of inhibitor concentration and temperature up to 50°C, while at temperatures above 50°C the values of efficiency decreased. The inhibitor adsorbed physically on metal surface and followed the Langmuir adsorption isotherm. Monolayer formed spontaneously on the metal surface. Maximum inhibition efficiency obtained was about 91 percent at 50°C in the 50 cm3/l inhibitor concentration. Originality/value: This work is an attempt to find a new, safe to environment, non-toxic corrosion inhibitor. Peach juice is a readily available material in Iraq and Middle East markets. © Emerald Group Publishing Limited.


Khadom A.A.,University of Daiyla | Yaro A.S.,University of Baghdad | Musa A.Y.,National University of Malaysia | Mohamad A.B.,National University of Malaysia | Kadhum A.A.H.,National University of Malaysia
Journal of the Korean Chemical Society | Year: 2012

The corrosion inhibition of copper-nickel alloy by Ethylenediamine (EDA) and Diethylenetriamine (DETA) in 1.5M HCl has been investigated by weight loss technique at different temperatures. Maximum value of inhibitor efficiency was 75% at 35 °C and 0.2 M inhibitor concentration EDA, while the lower value was 4% at 35 °C and 0.01 M inhibitor concentration DETA. Two mathematical models were used to represent the corrosion rate data, second order polynomial model and exponential model respectively. Nonlinear regression analysis showed that the first model was better than the second model with high correlation coefficient. The reactivity of studied inhibitors was analyzed through theoretical calculations based on density functional theory (DFT). The results showed that the reactive sites were located on the nitrogen (N1, N2 and N4) atoms.


Yaro A.S.,University of Baghdad | Khadom A.A.,University of Daiyla | Wael R.K.,University of Baghdad
Alexandria Engineering Journal | Year: 2013

The corrosion protection of mild steel in 1 M H3PO4 solution by apricot juice was studied at different temperatures by weight loss technique. Adsorption, activation and statistical studies were addressed in this work. Adsorption studies showed that inhibitor adsorbed on metal surface according to Langmuir isotherm. Average value of heat of adsorption was -14.93 kJ/mol indicates a spontaneous physical adsorption on metal surface. Activation parameters did not changed with addition of inhibitor indicates that there is no change in reaction mechanism. Analysis of variance (ANOVA) was also applied. This analysis showed that the corrosion rate influenced by temperature, inhibitor concentration and combined interaction of them. © 2013 Faculty of Engineering, Alexandria University. Production and hosting by Elsevier B.V. All rights reserved.


Yaro A.S.,University of Baghdad | Khadom A.A.,University of Daiyla
International Journal of Surface Science and Engineering | Year: 2010

The non-linear region of polarisation curve near the corrosion potential can be discussed depending on data of over potential as a function of current densities. These data can be analysed by suggesting a mathematical model taking into account the effect of mass transfer on activation process. This model was used to evaluate the values of polarisation resistance RPin presence and absence of potassium iodide (KI) as a corrosion inhibitor of low carbon steel in 2.5 M phosphoric acid at different temperatures. The values of polarisation resistance obtained by mathematical model compared with these obtained by Tafel parameters. The suggested β-model was very useful in evaluating the values of RP. The maximum value of polarisation resistance was 5049.13 Ωcm2at 30°C in presence of 0.05 M KI, while the minimum value was 1.885 Ωcm2at 60°C in absence of KI. These results indicate that the polarisation resistance values increased with the increase of KI concentration, and decreased with the increase of temperature. Copyright © 2010 Inderscience Enterprises Ltd.


Khadom A.A.,University of Daiyla | Yaro A.S.,University of Baghdad
Russian Journal of Physical Chemistry A | Year: 2011

The corrosion inhibition of copper-nickel alloy by benzotriazole (BTA) in 1.5 M HCl has been investigated by weight loss and polarization techniques at different temperatures. Maximum value of inhibitor efficiency was 99.8% at 35°C and 0.1 M inhibitor concentration, while the lower value was 86.3% at 65°C and 0.02 M inhibitor concentration. The activation energy values were higher in presence of BTA which indicate that in presence of inhibitor, corrosion reaction requires more energy to occur. Two mathematical models were used to represent the weight loss corrosion rate data with high correlation coefficients. Electrochemical polarization measurements showed that BTA is a mixed type inhibitor. © 2011 Pleiades Publishing, Ltd.

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