Document Details

Document Type : Article In Journal 
Document Title :
Synergistic Effect of Azadirachta Indica Extract and Iodide Ions on the Corrosion Inhibition of Aluminium in Acid Media
التأثير التآزري لنبات النيم وأيون اليود يد على تآكل وتثبيط تآكل الألومنيوم في الوسط الحمضي
 
Subject : Scientific Research 
Document Language : English 
Abstract : The synergistic action caused by iodide ions on the corrosion inhibition of aluminum (Al) in 0.5 M HCl in the presence of Azadirachta Indica (AZI) plant extract has been investigated using potintiodynamic polarization and impedance techniques. It is found that AZI extract inhibits the corrosion of aluminum in 0.5 M HCl. The inhibition efficiency increases with the increase in AZI extract concentration, until 24% v/v of AZI extract, and then Inh.% is decreased with father increase in AZI extract concentration. The adsorption of this extract in the studied concentration is found to obey Frewendlish adsorption isotherm. The addition of iodide ions enhances the inhibition efficiency to a considerable extent. The increase in Inh.% values in presence of fixed concentration of iodide ions indicates that AZI extract forms an insoluble complex at lower AZI extract concentrations by undergoing a joint adsorption. But at higher concentrations of AZI extract, competitive adsorption is found between iodide ions and the formed complex leading to less Inh.%. The Inh.% decreased in presence of iodide ions with AZI extract than in presence of AZI extract alone at all studied iodide concentrations. The synergism parameter Sθ is defined and calculated from surface coverage values. This parameter in the case of AZI extract is found to be more than unity, indicating that the enhanced inhibition efficiency caused by the addition of iodide ions. 
ISSN : 1012-1319 
Journal Name : Science Journal 
Volume : 52 
Issue Number : 3 
Publishing Year : 1428 AH
2008 AD 
Article Type : Article 
Added Date : Wednesday, July 25, 2012 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
سناء طاهر عربArab, Sanaa TaherInvestigatorDoctoratedr.s.arab@hotmail.com
أعيشة محمود التركستانيAL-TURKUSTANI, Aisha MahmmodResearcherDoctorateA.M.Turkustani@hotmail.com
ريما حسن الظاهريAl- Dhahiri, Reema HassenResearcherDoctorater.h.208@hotmail.com

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