Studies on the effect of two salen schiff-bases on the corrosion of low alloy steel in 1m hcl

• FATEMEH BAGHAEI RAVARI ^[1] ; ATHAREH DADGARINEZHAD ^[1] ; IRAN SHEKHSHOAEI ^[2]
  1. [1] Shahid Bahonar University Faculty of Engineering Department of Materials Science & Engineering
  2. [2] Shahid Bahonar University Department of Chemistry
• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 55, Nº. 3, 2010, págs. 328-331
• Idioma: inglés
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• Resumen

  • The corrosion inhibition by two synthesized Schiff -bases of bis-(2-hydroxy-3-methoxy)-l,6-diaminohexane salicyladimine and bis- (2-hydroxy)-1,6-diaminohexane salicyladimine was investigated by weight loss, Tafel polarization and AC impedance on low alloy steel in 1M HC1. The results show that these Schiff -bases act as anodic type inhibitors. The inhibition efficiency obtained from all method employed are in good agreement. Changes in impedance parameters (Rt and Cdt ) are indicative of adsorption of Schiff-bases onthe metal surface leading to the formation of protective film. Two Schiff-bases are found to adsorb on low alloy steel surface according to the Langmuir adsorption isotherm and thermodynamics calculations revealed that bis-(2-hydroxy-3-methoxy)-1,6-diaminohexane salicyladimine had larger adsorption constant and more negative free energy of adsorption than bis-(2-hydroxy)-1,6-diaminohexane salicyladimine.