Document Details

Document Type : Article In Journal 
Document Title :
Corrosion and Corrosion Inhibition of Mild Steel in H2SO4 Solutions by Zizyphus Spina-Christi as Green Inhibitor
تآكل وتثبيط تآكل الصلب في محلول حمض الكبريتيك باستخدام نبات السدر كمثبط من المثبطات الخضراء
 
Subject : Scientific Research 
Document Language : English 
Abstract : The corrosion and corrosion inhibition of mild steel in 1.0 M H2SO4 containing 10% ethyl alcohol (EtOH) by Zizyphus Spina-Christi (ZSC) extracts (aqueous extract and alcoholic extract) has been studied using chemical techniques (hydrogen evolution(HE) and mass loss(ML)) and electrochemical techniques (electrochemical impedance spectroscopy(EIS) and potentiodynamic polarization(PDP)). The effect of acid concentration on the corrosion rate of mild steel increases with acid concentration (0.25-1.5) M showing first order corrosion reaction without changing the reaction mechanism, and the results showed that when the concentration of ZSC extracts (aqueous extract and alcoholic extract) increased the rate of steel corrosion is decreased, which indicates that the inhibition of the corrosion process is produced. Electrochemical impedance spectroscopy results showed that the corrosion and corrosion inhibition of steel occurred mainly by charge transfer. The electrochemical results of polarization also showed that the extracts of ZSC plant act as mixed type inhibitors, they retarded both cathodic and anodic reaction. The experimental results from chemical and electrochemical studies were fit Langmuir isotherm. Values of equilibrium constant of adsorption Kads and the standard free energy of adsorption ΔG°ads. , for the extracts are calculated. 
ISSN : 1916-9698 
Journal Name : International Journal of Chemistry 
Volume : 2 
Issue Number : 2 
Publishing Year : 1431 AH
2010 AD 
Article Type : Article 
Added Date : Tuesday, July 24, 2012 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
عائشة م التركستانيAL-TURKUSTANI, Aisha MInvestigatorDoctorateA.M.Turkustani@hotmail.com
سناء طاهر عربArab, Sanaa TaherResearcherDoctoratedr.s.arab@hotmail.com
أريج أ الرحيليAl- Reheli, Areej AResearcherDoctorateskooon_n-alil@hotmail.com

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