Inhibition of mild steel corrosion in HCl using pineapple leaves (Ananas comosus L.) extract

Ekanem, U. F.; Umoren, Savıour A.; Udousoro, Imaobong; Udoh, A.P.

doi:10.1007/s10853-010-4617-y

Cited by 124 publications

(75 citation statements)

References 34 publications

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“…approaching the average value of the absolute gas constant when multiplied by the degree of temperature. This behaviour suggests that the corrosion reaction is unimolecular in nature (Ekanem et al, 2010). It is clear from equation (8) that the corrosion current density that is achieved can be determined by the activation energy and the pre-exponential factor.…”

Section: The Effect Of Temperaturementioning

confidence: 99%

“…Thus, the true energy of activation E can be given by the expression, E = E + ∆H, for this a highly exothermic reaction and when the value of E is small one might expect the E value to be negative (Zhang et al, 2012). Thus, the values of activation energy are higher than the enthalpy of activation as shown in Table 3 which refers to the evolution of hydrogen gas and is related to the reduction in the total volume of hydrogen evolution in the cathodic process (Hassan, 2007), (Ekanem et al, 2010). Besides, the difference between the activation energy and the enthalpy of activation remain in range of (2-3) kJ mol -1 i.e.…”

Section: The Effect Of Temperaturementioning

confidence: 99%

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Adsorption Aspects, Inhibitory Properties and a Study of Surface Corrosion of Carbon Steel in Acidic Media

Qhatan¹,

Adel²

2016

MAS

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The impact of cupral compound on steel in presence of deaerated 0.25 M H 2 SO 4 and 0.5M HCl acidic solutions at 298.15K was examined by employing electrochemical measurements. It has been observed that the corrosion efficiency increased by increasing of cupral concentration of the corrosion inhibitor and this enhanced the inhibitory action as mixed type inhibitor. Several different adsorption models were examined which indicate the adsorption of cupral compound as inhibitor on the carbon steel electrode surface follows the Langmuir isotherm equation. The thermodynamic factors governing adsorption, as well as the parameters of kinetics corrosion have been estimated. The role of nanosilica has been observed to reduce the values of current density of corrosion process and this was confirmed by study the surface morphology of electrode via SEM-EDX and AFM techniques by formation a protective layer on carbon steel electrode.

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Section: The Effect Of Temperaturementioning

confidence: 99%

Section: The Effect Of Temperaturementioning

confidence: 99%

Adsorption Aspects, Inhibitory Properties and a Study of Surface Corrosion of Carbon Steel in Acidic Media

Qhatan¹,

Adel²

2016

MAS

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“…Commonly used corrosion inhibitor compound is a compound containing atoms of N, P, O, S, or As 3 . Have many natural ingredients extracts were trying to get environmentally friendly corrosion inhibitors, and non-toxic mainly taken from the flower extrac 14 , fruit skins 1,5 , leaves 6 , and seeds 7 . Such as henna leaves 8, green tea 9 , vegetable 10 , Gracinia mangosteen peels 11 , papaya leaves 12 , Solanum melongena leaves 13 , and pineapple leaves 14 .…”

Section: Introductionmentioning

confidence: 99%

Green Inhibitor for Mild Steel in Acidic Solution by Using Crude Extract and Polar Extract of Theobroma cacao Peels

Sukatik¹

2017

Orient. J. Chem

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Corrosion inhibition and adsorption properties of the crude extract and polar extract of Theobroma cacao peels on mild steel in HCl 1.5M was studied using the method of weight lost and potentiodynamic polarization (Tafel). Inhibition efficiency were measured for immersion for 192 hours, the concentration of the extract 0.5-2.5% with an interval of 0.5% and the rang of temperature (303-323) K. Electrochemical polarization evaluated to know the type of inhibitor. Infrared spectra and GCMS were conducted to determine the extract compounds that act in the inhibition process. The surface morphology of samples was observed by a photo optical. The results showed that the corrosion rate decreases with increasing the concentration of the extract and increases with increasing temperature. Inhibition efficiency for crude extract and polar extract was 83.45% and 96.26% (weight loss), 85.23% and 92.08% (Tafel) and 72.29% and 83.95% (303 K) at 2.5% of concentration of extract. The increase in the efficiency of inhibition was also followed by an increase in the degree of surface coverage of a chemical adsorption is happening on the surface. Adsorption that occurred on the surface of mild steel obeys the Langmuir isotherm. This polarization curve indicates inhibitor behaves as mixture inhibitor with predominantly on cathodic inhibition. Apparently, the polar extract is more effective to reduce the corrosion rate than crude extract. The addition of polar extract of cacao into a solution of HCl is very effective to reduce the attack corrosion of the mild steel surface.

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“…Initial interest in "green inhibitors" began in the 1990s; since then, there has been an increasing research activity on the inhibitive properties of eco-friendly and harmless compounds. In this sense, some authors have reported the use of tannins, amino acids, vitamins, proteins, polymers, and phosphono compounds as corrosion and scaling inhibitors [1][2][3] to replace toxic metal cations, phosphates, and polymers having a low biodegradability level 1,[4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] . Unfortunately, these last compounds are still used because they are effective at relatively low cost.…”

Section: Introductionmentioning

confidence: 99%

Modified cassava starches as potential corrosion inhibitors for sustainable development

et al. 2013

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Activated (AS) and carboxymethylated (CMS 0.24 ) cassava starch derivatives were studied as corrosion inhibitors for carbon steel XC35 in a 200 mgL -1 NaCl solution. They were characterized by back titration and Fourier Transform Infrared Spectroscopy (FTIR). Electrochemical techniques were used to evaluate the inhibitive properties of starches at room temperature and the chemical composition of the protective films was determined by X-Ray Photoelectron Spectroscopy (XPS). Electrochemical measurements revealed that AS acts as mixed inhibitor, whereas CMS 0.24 mainly inhibits the anodic reaction. In both cases, the protection increased with the inhibitor concentration; nevertheless, after 24 hours of immersion, the CMS 0.24 loses its properties, while AS molecules still maintains them. XPS analyses show that the inhibitive films are composed of an iron oxide/hydroxide mixture in which starch molecules are incorporated. Results were explained taking into consideration the hydrophilicity and the strength of the ionic interaction of the starches with the metal surface.

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Inhibition of mild steel corrosion in HCl using pineapple leaves (Ananas comosus L.) extract

Cited by 124 publications

References 34 publications

Adsorption Aspects, Inhibitory Properties and a Study of Surface Corrosion of Carbon Steel in Acidic Media

Adsorption Aspects, Inhibitory Properties and a Study of Surface Corrosion of Carbon Steel in Acidic Media

Green Inhibitor for Mild Steel in Acidic Solution by Using Crude Extract and Polar Extract of Theobroma cacao Peels

Modified cassava starches as potential corrosion inhibitors for sustainable development

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