Study on the performance of Ajowan seeds extract on the corrosion of steel in acidic solution by effect of temperature | Zendy

Aisha M. Al-Turkestani | Zendy

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Study on the performance of Ajowan seeds extract on the corrosion of steel in acidic solution by effect of temperature

Author(s) -

Aisha M. Al-Turkestani

Publication year - 2010

Publication title -

material science research india

Language(s) - English

Resource type - Journals

eISSN - 2394-0565

pISSN - 0973-3469

DOI - 10.13005/msri/070116

Subject(s) - corrosion , polarization (electrochemistry) , adsorption , electrochemistry , atmospheric temperature range , materials science , activation energy , chemistry , metallurgy , inorganic chemistry , thermodynamics , electrode , physics

Electrochemical measurements (EIS and PDP) have been used to study the temperature effect in the range (30p C 70p C) on the performance of Ajowan seeds extract (ASE) and its inhibitive effects on the corrosion of steel in 2.0M H2SO4. A good agreement between the data obtained by impedance and polarization measurements was found. Results obtained reveal that ASE reduces the corrosion rate at all temperatures studied. The inhibition efficiency increases with rise temperature and the activation corrosion energy decrease in presence of ASE suggest a chemical adsorption model for the corrosion processes.Thermodynamic parameters, Ea, ΔH#, ΔS# have been calculated and are discussed.

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