THERMODYNAMIC AND ADSORPTION ISOTHERM OF N,N'-BIS(2,4,6-TRIHYDROXYACETOPHENONE)-2,2-DIMETHYLPROPANDIIMINE AS A CORROSION INHIBITOR ON SA-210 STEEL IN ALKALINE NACL SOLUTION

THERMODYNAMIC AND ADSORPTION ISOTHERM OF N,N'-BIS(2,4,6-TRIHYDROXYACETOPHENONE)-2,2-DIMETHYLPROPANDIIMINE AS A CORROSION INHIBITOR ON SA-210 STEEL IN ALKALINE NACL SOLUTION

Adsorption isotherm of N,N'-bis(2,4,6-trihydroxyacetophenone)-2,2-dimethylpropandiimine (THAPDP) as an environmentally friendly Salen Ligand corrosion inhibitor on mild steel was studied in alkaline solution (pH=10) containing 3% NaCl. Measurements were carried out using electrochemical and sur...

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Autores principales: DAHDELE,J, DANAEE,I, RASHED,G.R
Lenguaje:English
Publicado: Sociedad Chilena de Química 2016
Materias:
Corrosion
Inhibitor
Adsorption isotherm
Langmuir
Salen ligand
Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072016000300003
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Sumario:Adsorption isotherm of N,N'-bis(2,4,6-trihydroxyacetophenone)-2,2-dimethylpropandiimine (THAPDP) as an environmentally friendly Salen Ligand corrosion inhibitor on mild steel was studied in alkaline solution (pH=10) containing 3% NaCl. Measurements were carried out using electrochemical and surface techniques. Potentiodynamic polarization curves suggested that this compound was an effective corrosion inhibitor for mild steel and the protection efficiency was increased with the increase in inhibitor concentration. The experimental results indicated that this organic compound was a mixed-type inhibitor. Adsorption on the mild steel surface followed the Langmuir isotherm model. Activation parameters and thermodynamic adsorption parameters of the corrosion process such as Ea, ΔH, ΔS, Kads, and AG . were calculated at different temperatures.

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