5-AMINO-1,3,4-THIADIAZOLE-2-THIOL CORROSION CURRENT DENSITY AND ADSORPTION THERMODYNAMICS ON ASTM A-890-1B STAINLESS STEEL IN A 3.5% NaC1 SOLUTION

Guzman, M.; Lara R.; Vera L.

Abstract

Using the electrochemical linear polarization resistance technique, 5-amino-1,3,4-thiadiazole-2-thiol corrosion current density on ASTM A-890-1B steel is determined in a 3.5% NaC1 solution at different temperatures. The corrosion inhibition process is mixed. Apparent activation energy is calculated, being the one with inhibitor slightly greater than that without it. Adsorption matches Damaskin-Parsons isotherm, showing that molecules adsorbed by the metal surface reject each other. Three water molecules on the metal surface are replaced by one inhibitor molecule. This is demonstrated by calculating the surface these molecules project. Normal thermodynamic adsorption parameters are calculated, showing that the process is spontaneous and exothermic. Inhibitor adsorption on the metal surface is a chemical adsorption.

Más información

Título según SCOPUS: 5-amino-1,3,4-thiadiazole-2-thiol corrosion current density and adsorption thermodynamics on ASTM A-890-1B stainless steel in a 3.5% NaCl solution
Título según SCIELO: 5-AMINO-1,3,4-THIADIAZOLE-2-THIOL CORROSION CURRENT DENSITY AND ADSORPTION THERMODYNAMICS ON ASTM A-890-1B STAINLESS STEEL IN A 3.5% NaC1 SOLUTION
Título de la Revista: JOURNAL OF THE CHILEAN CHEMICAL SOCIETY
Volumen: 54
Número: 2
Editorial: 2013
Fecha de publicación: 2009
Página de inicio: 123
Página final: 128
Idioma: en
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072009000200005&lng=en&nrm=iso&tlng=en
DOI:

10.4067/S0717-97072009000200005

Notas: SCIELO, SCOPUS