Record number :
Title of article :
Electrochemical behaviour of brass in artificial seawater: effect of organic inhibitors
Author/Authors :
R. Ravichandran، نويسنده , , N. Rajendran*، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Pages :
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Abstract :
The electrochemical behaviour of brass was studied in artificial seawater with two organic inhibitors namely N,Ndibenzotriazol- 1-ylmethylaminomethane (DBMM) and 3-hydroxypropyl benzotriazole (HPBT) using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), cyclic voltammetry and current transient techniques. Preliminary screening of the inhibition efficiency (IE) was carried out using weight-loss measurements. Polarization measurements showed that the organic compounds investigated are mixed type inhibitors, inhibiting the corrosion of brass by blocking the active sites of the metal surface. Changes in the impedance parameters (charge transfer resistance (Rct) and double layer capacitance (Cdl)) are related to adsorption of organic inhibitors on the metal surface, leading to the formation of a protective film, which grows with increasing exposure time. Cyclic voltammetric studies confirmed that the addition of inhibitors effectively inhibits the anodic dissolution of brass in artificial seawater.
Keywords :
Corrosion inhibitors , Cyclic voltammetry , Impedance , polarization , Seawater
Journal title :
Applied Surface Science
Journal title :
Applied Surface Science
Serial Year :
Link To Document :