Indian Journal of Advances in Chemical Science Volume: 5, Issue 4: , September 2017

 
             
   
   

ISSN No.: 2320-0898 (Print); 2320-0928 (Electronic)

DOI:  10.22607/IJACS.2017.504006

 

   

Research Article

 

      Inhibitive Action of Ailanthus excelsa Roxb. Extract on the Corrosion of Mild Steel in Hydrochloric Acid Medium    
R. Vasantha Jothi*, R. Saratha, D. Senthil Vadivu
ABSTRACT
 

The inhibitive action of Ailanthus excelsa Roxb. (AEL) on mild steel (MS) corrosion in 1.0 M hydrochloric acid was studied using the chemical method. The effect of temperature on the corrosion behavior of MS in 1.0M HCl with the addition of plant extracts was studied in the temperature range of 308-333 1 K, and inhibition efficiencies up to 98% for AEL were obtained. Adsorption of AEL on the MS surface was found to obey Langmuir adsorption isotherm. Free energy of adsorption (ΔGads) calculated from the temperature studies revealed the possibility of both physisorption and chemisorption. Scanning electron microscopy images confirm the formation of protective film on the metal surface by adsorption of inhibitor which offers protection against acid attack.
 

     
     

Key words:  Ailanthus excelsa Roxb, Corrosion inhibitor, Mild steel, Weight loss method, Adsorption isotherm, Scanning electron microscopy.

 

 

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