Evidence of caffeine adsorption on a low-carbon steel surface in ethanol

Trindade, Letícia Guerreiro da; Gonçalves, Ricardo Júnior de Assis Fernandes

doi:10.1016/j.corsci.2009.03.038

Cited by 59 publications

(35 citation statements)

References 31 publications

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“…Interestingly, caffeine also showed excellent inhibition efficiency in the presence of Zn 2+ cations due to a synergistic effect that contributed to the formation of a protective film containing the Fe 2+ -caffeine complex and Zn(OH) 2 [18]. Moreover, several electrochemical methods confirmed the ability of caffeine to adsorb onto Zn [19] and low-carbon steel [20] surfaces in ethanol solutions and to inhibit the copper corrosion process in potassium nitrate aqueous solutions containing chloride species [21] and aluminum in sodium sulfate aqueous solution [22]. However, as can be deduced, the interaction between the caffeine molecule and copper and its alloys in acid media has not been investigated in detail.…”

Section: Introductionmentioning

confidence: 79%

Adsorption behavior of caffeine as a green corrosion inhibitor for copper

Souza

Giacomelli

Gonçalves

et al. 2012

Materials Science and Engineering: C

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105

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Section: Introductionmentioning

confidence: 79%

Adsorption behavior of caffeine as a green corrosion inhibitor for copper

Souza

Giacomelli

Gonçalves

et al. 2012

Materials Science and Engineering: C

Self Cite

105

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“…The standard free energy of adsorption confirms a spontaneous chemical adsorption step. [36] Calotropis procera and calotropis gigantean…”

Section: Caffeinementioning

confidence: 99%

Plant Extracts as Green Corrosion Inhibitors in Various Corrosive Media- A Review

Rathi¹

2017

WJPPS

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Corrosion of materials has continued to receive interest in the technological world. Corrosion is an unavoidable but a controllable process. The use of plant extracts as green corrosion inhibitors is one of the best options of protecting metals and alloys. Large numbers of organic compounds were studied to investigate their corrosion inhibition potential. All these studies indicate that organic compounds those contain N, S and O in their structures showed significant inhibition efficiency. But due to the toxicity of organic corrosion inhibitors to the environment has prompted the search for green corrosion inhibitors as they are biodegradable and do not contain heavy metals or other toxic compounds. This review briefly discusses some of the interesting features of the green inhibitors reported during the last decade.

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“…Such compounds can adsorb onto the metal surface and block the active surface sites, thus reducing the corrosion rate. The polar function is usually regarded as the reaction center for the establishment of the adsorption process [13,14]. The known hazardous effects of most synthetic organic inhibitors and restrictive environmental regulations [15] have made it necessary to search for cheaper, non-toxic and environmentally friendly natural products as corrosion inhibitors.…”

Section: Introductionmentioning

confidence: 99%

Rothmannia longiflora extract as corrosion inhibitor for mild steel in acidic media

et al. 2015

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Background The inhibitive effect of the aqueous extract of Rothmannia longiflora (RL) on the corrosion of mild steel in 1 M HCl and 0.5 M H 2 SO 4 solutions was investigated by weight loss measurement as well as potentiodynamic polarization and electrochemical impedance spectroscopy measurements. Result The extract was found to efficiently inhibit the corrosion process in both environments and inhibition efficiency increased with increasing extract concentration as well as rise in temperature. Data from electrochemical measurements suggest that the extract functioned by adsorption of the organic matter on the metal/corrodent interface, inhibiting both the anodic and cathodic half reactions of the corrosion process. Conclusion The result obtained from this study clearly shows that RL functioned as a good inhibitor for the corrosion of mild steel in 1 M HCl and 0.5 M H 2 SO 4 solutions and the inhibiting efficiency value increased with the inhibitor concentration. The adsorption of the RL on the mild steel surface in acid solution obeyed Langmuir adsorption isotherm.

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Evidence of caffeine adsorption on a low-carbon steel surface in ethanol

Cited by 59 publications

References 31 publications

Adsorption behavior of caffeine as a green corrosion inhibitor for copper

Adsorption behavior of caffeine as a green corrosion inhibitor for copper

Plant Extracts as Green Corrosion Inhibitors in Various Corrosive Media- A Review

Rothmannia longiflora extract as corrosion inhibitor for mild steel in acidic media

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