Adsorption mechanism of benzotriazole for corrosion inhibition of copper-nickel alloy in hydrochloric acid

• ANEES A KHADOM ^[1] ; APRAEL S YARO ^[2] ; ABDUL AMIR H KADHUM ^[1]
  1. [1] National University of Malaysia

     National University of Malaysia

     Malasia

     
  2. [2] Baghdad University College of Engineering Chemical Engineering Department
• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 55, Nº. 1, 2010, págs. 150-152
• Idioma: inglés
• Enlaces
  • Texto completo
• Resumen

  • The inhibition of copper corrosion by Benzotriazole (BTA) in 5% HC1 has been investigated by weight loss technique at different temperatures. Langmuir adsorption isotherm, Freundlich Adsorption Isotherm and Kinetic-Thermodynamic Model were used to describe the adsorption process depending on values of surface converge. Maximum value of surface converge was 0.998 for BTA at 35 °C and 15 g/1 inhibitor concentration, while the lower value was 0.868 at 55 °C and 1 g/1 inhibitor concentration. The films formed on the copper-nickel alloy surface of BTA appeared to obey the Langmuir Adsorption Isotherm more than Freundlich adsorption isotherm. In the other hand, results showed that the Kinetic-Thermodynamic Model was unsuitable to fit the experimental data of the BTA of the present study.