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Sanaa Taher Saeed Arab
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 Type
Dr Grade
Email
سناء طاهر عرب
Arab, Sanaa Taher
Investigator
Doctorate
dr.s.arab@hotmail.com
أعيشة محمود التركستاني
AL-TURKUSTANI, Aisha Mahmmod
Researcher
Doctorate
A.M.Turkustani@hotmail.com
ريما حسن الظاهري
Al- Dhahiri, Reema Hassen
Researcher
Doctorate
r.h.208@hotmail.com
Files
File Name
Type
Description
34027.pdf
pdf
Abstract
36776.pdf
pdf
The Scientific Research
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