Mild steel protection in acidic media using Mucuna pruriens seed extract

Akalezi, Chris O.; Ogukwe, Cynthia E.; Ejele, E.A.; Oguzie, Emeka E.

doi:10.17675/2305-6894-2016-5-2-3

Cited by 24 publications

(15 citation statements)

References 31 publications

(36 reference statements)

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“…where A is the frequency factor, E a is the apparent activation energy, R is the constant for ideal gases and T is the absolute temperature. An alternative formulation of the Arrhenius equation is (36)…”

Section: Weight-loss Measurementsmentioning

confidence: 99%

A study of the gorse aqueous extract as a green corrosion inhibitor for mild steel in HCl aqueous solution

Trindade

Santos

Cordeiro

et al. 2017

Green Chemistry Letters and Reviews

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The behavior of the gorse extract has been investigated as a new corrosion inhibitor by weight-loss measurements, potentiodynamic polarization curves, electrochemical impedance spectroscopy and scanning electron microscopy. Weight-loss measurements showed an increase in inhibition efficiency (IE) with the immersion time and the concentration of the extract. At 800 mg L −1 , the extract IE ranged from 72.5% to 93.8% for 2 and 48 h, respectively. The E a decreased slightly with the addition of the extract, characterizing the chemical adsorption by the molecules present in the extract on the surface. The measurements of electrochemical impedance spectroscopy showed an increase in R ct and a decrease in C dl , reaching 96.6% of IE at 1600 mg L −1. The polarization curves indicated that the gorse extract served as an adsorption inhibitor, reducing both the anodic and cathodic current density. The high-molecular-weight fraction isolated from the gorse extract also showed high inhibition efficiencies.

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Section: Weight-loss Measurementsmentioning

confidence: 99%

A study of the gorse aqueous extract as a green corrosion inhibitor for mild steel in HCl aqueous solution

Trindade

Santos

Cordeiro

et al. 2017

Green Chemistry Letters and Reviews

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show abstract

“…[27] In this study, eight major components were identified ( Table 2). According to the literature, [28][29][30] fatty acids (3-6 in Table 2) and β-Sitosterol Table 2) are the main responsible for the reduction of the corrosion rate.…”

Section: Resultsmentioning

confidence: 99%

Effect of Equisetum arvense extract as corrosion inhibitor of A36 steel in sulfuric acid solution

Ramírez‐Peralta

León-Silva

Díaz

et al. 2018

Materials & Corrosion

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The Equisetum arvense extract was prepared by the maceration technique and experimentally tested as a corrosion inhibitor of A36 steel in 0.5 M sulfuric acid at room temperature. The corrosion resistance was estimated by the determination of the polarization curves, linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS). In order to study the effect of the Equisetum arvense extract on the superficial morphology of metal, scanning electronic microscopy (SEM) was used. The results indicated a decrease of about two orders of magnitude in the corrosion rate, an increase in polarization resistance and a greater efficiency of inhibition by increasing the concentration of extract. The corrosion mechanism was mainly controlled by charge transfer from metal to the environment through the double electrochemical layer. The SEM images corroborated the results obtained in the corrosion tests, at higher concentration of extract less metal surface damage was observed.

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“…2 that inhibition efficiency of wheat starch increased with increasing immersion time, reaching the maximum efficiency on days 3 and showed gradual decrease in the subsequent days. The increase in inhibition efficiency with time may be attributed to strong stability of the glucose components adsorbed on the mild steel surface whereas the decrease in inhibition efficiency with time reflects desorption of glucose components from the mild steel surface, resulting in a reduced surface coverage [36].…”

Section: Weight Loss Measurement Resultmentioning

confidence: 99%

Protection of Mild Steel Corrosion in Sulphuric Acid Environment Using Wheat Starch

Nwanonenyi

Ogbobe

Oguzie

2017

IJET

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The corrosion of mild steel in 0.5 M H2SO4acid solution and the inhibition process by wheat starch (WS) was investigated using weight loss and potentiodynamic polarization measurement techniques respectively. Gravimetric results revealed that there is significant reduction in the corrosion rate of mild steel in the presence of inhibited solution compared to blank solution, and also the inhibition efficiency was found to depend on the concentration of the WS. Data on potentiodynamic polarization results confirmed that WS exhibited mixed type inhibition behaviour, though the cathodic effect was more pronounced. The mode of WS adsorption on the corroding metal surface followed Langmuir isotherm model. In addition, the trend of inhibition efficiency with temperature, activation energy and heat of adsorption parameters revealed a strong interaction between the WS constituents and the corroding metal surface, thus indicating that WS lowered the corrosion process by blanketing the mild steel surface through chemical adsorption mechanism. The mechanism of inhibition was discussed in the light of the chemical structure of starch.

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Mild steel protection in acidic media using Mucuna pruriens seed extract

Cited by 24 publications

References 31 publications

A study of the gorse aqueous extract as a green corrosion inhibitor for mild steel in HCl aqueous solution

A study of the gorse aqueous extract as a green corrosion inhibitor for mild steel in HCl aqueous solution

Effect of Equisetum arvense extract as corrosion inhibitor of A36 steel in sulfuric acid solution

Protection of Mild Steel Corrosion in Sulphuric Acid Environment Using Wheat Starch

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