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 - Synergism and antagonism in mild steel corrosion inhibition by sodium dodecylbenzenesulphonate and hexamethylenetetramine
AU - Hosseini, M.
AU - Mertens, S.F.L.
AU - Arshadi, M.R.
PY - 2003
Y1 - 2003
N2 - The inhibition effects of sodium dodecylbenzenesulphonate (SDBS) and hexamethylenetetramine (HA) on the corrosion of mild steel in sulphuric acid solution have been studied using weight loss, electrochemical impedance and Tafel polarisation measurements. For HA, a monotonous increase in inhibition efficiency is observed as a function of concentration. For SDBS, however, an optimum in the inhibition efficiency is observed for a concentration close to 250 ppm, which is ascribed to the formation of hemi-micellar aggregates that provoke inhibitor desorption from the metal/solution interface at higher concentrations. Upon mixing HA and SDBS, concentration regions showing synergistic and antagonistic inhibition behaviour are identified, and it is concluded that electrostatic interactions between adsorbate ions are likely responsible for both phenomena. Langmuir and Frumkin isotherms were tested for relevance in describing the adsorption behaviour of both HA and SDBS. © 2003 Published by Elsevier Science Ltd.
AB - The inhibition effects of sodium dodecylbenzenesulphonate (SDBS) and hexamethylenetetramine (HA) on the corrosion of mild steel in sulphuric acid solution have been studied using weight loss, electrochemical impedance and Tafel polarisation measurements. For HA, a monotonous increase in inhibition efficiency is observed as a function of concentration. For SDBS, however, an optimum in the inhibition efficiency is observed for a concentration close to 250 ppm, which is ascribed to the formation of hemi-micellar aggregates that provoke inhibitor desorption from the metal/solution interface at higher concentrations. Upon mixing HA and SDBS, concentration regions showing synergistic and antagonistic inhibition behaviour are identified, and it is concluded that electrostatic interactions between adsorbate ions are likely responsible for both phenomena. Langmuir and Frumkin isotherms were tested for relevance in describing the adsorption behaviour of both HA and SDBS. © 2003 Published by Elsevier Science Ltd.
KW - A. Mild steel
KW - Antagonism
KW - C. Acid corrosion
KW - Hexamethylenetetramine
KW - Inhibitors
KW - Sodium dodecylbenzenesulphonate
KW - Synergism
KW - Adsorption
KW - Corrosion prevention
KW - Desorption
KW - Isotherms
KW - Micelles
KW - Phase interfaces
KW - Polarization
KW - Sodium compounds
KW - Spectroscopy
KW - Sulfuric acid
KW - Steel corrosion
KW - corrosion inhibition
KW - Steel
KW - synergism
U2 - 10.1016/S0010-938X(02)00246-9
DO - 10.1016/S0010-938X(02)00246-9
M3 - Journal article
VL - 45
SP - 1473
EP - 1489
JO - Corrosion Science
JF - Corrosion Science
SN - 0010-938X
IS - 7
ER -