Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Asymmetrical Schiff bases as inhibitors of mild steel corrosion in sulphuric acid media
AU - Hosseini, M.
AU - Mertens, S.F.L.
AU - Ghorbani, M.
AU - Arshadi, M.R.
PY - 2003
Y1 - 2003
N2 - Two newly synthesised Schiff bases [H2A3, N,N′-ortho-phenylene(salicylaldimine-acetylacetone imine) and H2A4, N,N′-ortho-phenylene(salicylaldimine-2-hydroxy-1-naphthaldimine)] were studied as inhibitors for the corrosion of mild steel in 0.5 mol dm-3 sulphuric acid. Results of weight loss, electrochemical impedance and Tafel polarisation measurements consistently identify both compounds as good inhibitors, with efficiencies of around 95% at a concentration of 400 ppm. The inhibition is in both cases of a mixed anodic-cathodic nature. Differences in inhibition efficiency between H2A3 and H2A4 are correlated with their chemical structures. Several adsorption isotherms are assessed, and the Temkin isotherm is found to provide an accurate description of the adsorption behaviour of the investigated Schiff bases. © 2002 Elsevier Science B.V. All rights reserved.
AB - Two newly synthesised Schiff bases [H2A3, N,N′-ortho-phenylene(salicylaldimine-acetylacetone imine) and H2A4, N,N′-ortho-phenylene(salicylaldimine-2-hydroxy-1-naphthaldimine)] were studied as inhibitors for the corrosion of mild steel in 0.5 mol dm-3 sulphuric acid. Results of weight loss, electrochemical impedance and Tafel polarisation measurements consistently identify both compounds as good inhibitors, with efficiencies of around 95% at a concentration of 400 ppm. The inhibition is in both cases of a mixed anodic-cathodic nature. Differences in inhibition efficiency between H2A3 and H2A4 are correlated with their chemical structures. Several adsorption isotherms are assessed, and the Temkin isotherm is found to provide an accurate description of the adsorption behaviour of the investigated Schiff bases. © 2002 Elsevier Science B.V. All rights reserved.
KW - Adsorption
KW - Corrosion
KW - Metals
KW - Organic compounds
KW - Adsorption isotherms
KW - Carbon steel
KW - Electrochemistry
KW - Polarization
KW - Steel corrosion
KW - Sulfuric acid
KW - Schiff bases
KW - Corrosion inhibitors
U2 - 10.1016/S0254-0584(02)00390-5
DO - 10.1016/S0254-0584(02)00390-5
M3 - Journal article
VL - 78
SP - 800
EP - 808
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
SN - 0254-0584
IS - 3
ER -