Corrosion Inhibition of Aluminium in Acid Media By <i>Citrullus Colocynthis</i> Extract

Chauhan, Rajkiran; Garg, Urvija; Tak, R. K.

doi:10.1155/2011/340639

Cited by 20 publications

(22 citation statements)

References 7 publications

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“…The k value increases with rising temperature. At each temperature, a linear variation was observed in the presence of EEPgS, thus confirming a first order kinetics [30].…”

Section: Kinetic Treatment Of Weight Loss Resultssupporting

confidence: 69%

Corrosion Inhibition of Aluminum by Psidium Guajava Seeds in HCl Solution

Sharma¹,

Sharma²

2016

Port. Electrochim. Acta

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The corrosion inhibition and adsorption of ethanol extracts of Psidium guajava seeds (EEPgS), for aluminum in 0.5 N HCl solutions, were investigated using conventional weight loss, FTIR spectroscopy and SEM analysis techniques. The results showed that EEPgS performed well as inhibitor for the corrosion of aluminum in hydrochloric acid media. FTIR results showed that the inhibition mechanism was by adsorption process, through the functional groups present in the extract. Inhibition efficiency increased with increasing concentration of the plant extract, but decreased with the temperature rise. The weight loss data were fitted into a number of isotherms, though Langmuir model was found to be the best fit. The SEM photographs confirmed the protection offered by the extract on the surface of the metal.Keywords: Psidium guajava; aluminum; corrosion; inhibitor; adsorption. IntroductionIndustrial processes such as prickling and acid cleaning often involve contact between a metal and aggressive solution, consequently, the metal is prone to corrosion. In order to reduce the menace due to corrosion of industrial installations, several steps have been adopted. However, one of the best options available for protecting metals against corrosion involves the use of corrosion inhibitors [1][2]. The majority of well-known inhibitors are organic compounds containing hetero atoms, such as O, N, S, and multiple bonds, which allow an adsorption on the metal surface [3]. These compounds adsorb on metal surface and block the active surface sites to reduce the corrosion rate. Adsorption may take place by four different mechanisms through organic molecules at the metal/solution interface: (a) electrostatic attraction between the charged molecules and the charged metal, (b) interaction of uncharged electron pairs in

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“…The k value increases with rising temperature. At each temperature, a linear variation was observed in the presence of EEPgS, thus confirming a first order kinetics [30].…”

Section: Kinetic Treatment Of Weight Loss Resultssupporting

confidence: 69%

Corrosion Inhibition of Aluminum by Psidium Guajava Seeds in HCl Solution

Sharma¹,

Sharma²

2016

Port. Electrochim. Acta

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“…Adsorption isotherms such as Langmuir, Freundlich, Frumkin and Temkin have been used by various authors for the description of adsorption equilibrium. 6,29,35,36) Febrianto et al 36) reported that Temkin isotherm is superior in the prediction of gas phase equilibra, while Freundlich isotherm has the ability to fit nearly all experimental adsorption data. Langmuir adsorption isotherm is used when it is assumed that the inhibitors adsorbed on the metal surface decrease the surface area available for metallic corrosion.…”

Section: Resultsmentioning

confidence: 99%

Corrosion Inhibition of Mild Steel in Acidic Medium by Jathropha Curcas Leaves Extract

Odusote¹,

Ajayi²

2013

Journal of Electrochemical Science and Technology

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:Inhibition of corrosion of mild steel in sulphuric acid by acidic extract of Jatropha Curcas leaves has been studied using weight loss and thermometric measurements. It was found that the leaves extract act as a good corrosion inhibitor for mild steel in all concentrations of the extract. The inhibition action depends on the concentration of the Jatropha Curcas leaves extract in the acid solution. Results for weight loss and thermometric measurements indicate that inhibition efficiency increase with increasing inhibitor concentration. The adsorption of Jatropha curcas leaves extract on the surface of the mild steel specimens obeys Langmuir adsorption isotherm. Based on the results, Jatropha curcas leaves extract is recommended for use in industries as a replacement for toxic chemical inhibitors.

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“…The use of natural products as corrosion inhibitors have been reported by several research scientists. Numerous naturally occurring products such as Prosopis juliflora 4 , Lawsonia 5 , Calotropis 6 , Acacia senegal 7 , Citrullus colocynthis 8 , Aloes 9 , Tagetes erecta 10 , Retama monosperma 11 and Canna indica 12 plant extracts have been evaluated as effective corrosion inhibitors.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Study of Mild Steel Corrosion Inhibition in Sulphuric Acid Medium by Tribulus terrestris Fruit Extract

2017

JCBSC

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Corrosion Inhibition of Aluminium in Acid Media By Citrullus Colocynthis Extract

Cited by 20 publications

References 7 publications

Corrosion Inhibition of Aluminum by Psidium Guajava Seeds in HCl Solution

Corrosion Inhibition of Aluminum by Psidium Guajava Seeds in HCl Solution

Corrosion Inhibition of Mild Steel in Acidic Medium by Jathropha Curcas Leaves Extract

Thermodynamic Study of Mild Steel Corrosion Inhibition in Sulphuric Acid Medium by Tribulus terrestris Fruit Extract

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