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    STUDIA CHEMIA - Ediţia nr.3 din 2014  
         
  Articol:   CORROSION INHIBITION OF ALUMINIUM BY CYCLOHEXYLAMINE DITHIOCARBAMATE IN ACIDIC SOLUTION.

Autori:  . 		 
       
         
  Rezumat:   The role of cyclohexylamine dithiocarbamate (CHDTC) in the corrosion inhibition of aluminium in 1 M HCl solution is investigated by weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy, and scanning electron microscopy techniques. The results suggest that CHDTC is a good inhibitor with mixed-type character for aluminium in acidic solution. Both anodic and cathodic processes on the metal surface are hindered and there is a direct relationship between the concentration of CHDTC and the inhibition efficiency. The inhibition mechanism involves the adsorption of CHDTC on the metal surface as seen from the equivalent circuit analysis of the EIS results. Weight loss experiments are carried out with aluminium samples in 1 M HCl solution at room temperature and the same trend of inhibition is produced. Scanning electron microscopy (SEM) is used to image the surface at the different stages of the corrosion inhibition processes. Adsorption of CHDTC molecules onto the aluminium surface can be concluded as a function of concentration. 

Keywords: Aluminium, corrosion inhibition, cyclohexylamine dithiocarbamate, acidic solution, weight loss, polarization, EIS, SEM
 
         
     
         
         
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