2008
DOI: 10.1007/s10800-008-9546-y
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Novel calixarene derivatives as inhibitors of mild C-38 steel corrosion in 1 M HCl

Abstract: Calixarenes CA1-CA4 containing one to four 4-imidazolylethylamidocarbonyl groups were synthesized and tested as inhibitors for the corrosion of mild steel in 1 M HCl at 308 K. The study was made using Tafel polarisation and weight-loss methods. In contrast to CA1, calixarenes CA2-CA4 were good inhibitors, reaching inhibition efficiencies (E%) of 94 to 100% at 10 -4 M. The values of the inhibition efficiency calculated by the two techniques were in acceptable agreement. E% increased with the number of 4-imidazo… Show more

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Cited by 15 publications
(2 citation statements)
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References 27 publications
(26 reference statements)
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“…Those more negative than -40 kJ mol -1 involve charge sharing or transfer from the inhibitor molecules to the metal surface to form a coordinate bond (chemisorption) [24,25]. The calculated DG ads value in our case indicates, therefore, consistent with deductions based on the corrosion rates, that the adsorption mechanism of the P2 on mild steel in 3.9 M HCl solution was one of physisorption.…”
Section: Adsorption Isothermsupporting
confidence: 85%
“…Those more negative than -40 kJ mol -1 involve charge sharing or transfer from the inhibitor molecules to the metal surface to form a coordinate bond (chemisorption) [24,25]. The calculated DG ads value in our case indicates, therefore, consistent with deductions based on the corrosion rates, that the adsorption mechanism of the P2 on mild steel in 3.9 M HCl solution was one of physisorption.…”
Section: Adsorption Isothermsupporting
confidence: 85%
“…Many organic compounds containing oxygen, nitrogen, and sulfur atoms have been used as corrosion inhibitors for carbon steel in various aggressive environments [6][7][8][9]. The addition of high-molecular-weight organic compounds such as surfactants to combat corrosion of carbon steel has found wide application in many fields [1].…”
Section: Introductionmentioning
confidence: 99%