INHIBITION OF MILD STEEL CORROSION IN H2SO4USING EXUDATE GUM FROMPACHYLOBUS EDULISAND SYNERGISTIC POTASSIUM HALIDE ADDITIVES

Umoren, Savıour A.; Ekanem, U. F.

doi:10.1080/00986441003626086

Cited by 87 publications

(34 citation statements)

References 39 publications

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“…Corrosion inhibition synergism thus results from increased surface coverage arising from ion-pair interactions between the organic cations and anions. Influence of halide ions on corrosion inhibition of metals using synthetic polymers have been reported (Larabi et al 2004;Jeyaprabha et al 2005;Umoren et al 2006bUmoren et al , 2008a but the effect with naturally occurring polymers have not been investigated although we have reported a few for mild steel in acidic medium in our laboratory (Umoren and Ebenso 2008;Umoren et al 2008b, c;Umoren and Ekanem 2009).…”

Section: Introductionmentioning

confidence: 85%

“…The assembly is given in Fig. 1 and detailed description is reported elsewhere (Umoren and Ekanem 2009 different concentrations of CMC in combination with 5 mM KCl, KBr, and KI was introduced into a reaction vessel which was connected to a burette through a delivery tube. The initial volume of air in the burette was recorded.…”

Section: Hydrogen Evolution Measurementsmentioning

confidence: 99%

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Synergistic and antagonistic effects between halide ions and carboxymethyl cellulose for the corrosion inhibition of mild steel in sulphuric acid solution

et al. 2010

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The corrosion and corrosion inhibition effect of carboxymethyl cellulose (CMC) for mild steel in sulphuric acid medium was investigated using chemical (weight loss and hydrogen evolution) techniques at 30-60°C. The effect of addition of halide ions (Cl -, Br -, and I -) was also studied. It was found that CMC functions as an inhibitor for acid induced corrosion for mild steel. Inhibition efficiency increases with increase in immersion time but decreases with increase in temperature. Addition of halide ions reveals that chloride ions (Cl -) antagonize the inhibition process whereas iodide ions (I -) exert synergistic effect on the corrosion inhibition by CMC. Corrosion inhibitive effect was afforded by adsorption of CMC molecules onto the mild steel surface both in the absence and presence of halide ions which was found to follow Langmuir adsorption isotherm model. The phenomenon of physical adsorption is proposed from decrease in inhibition efficiency with increase in temperature. The inhibition mechanism was further corroborated by the values of thermodynamic and kinetic parameters obtained from the experimental data.

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Section: Introductionmentioning

confidence: 85%

Section: Hydrogen Evolution Measurementsmentioning

confidence: 99%

Synergistic and antagonistic effects between halide ions and carboxymethyl cellulose for the corrosion inhibition of mild steel in sulphuric acid solution

et al. 2010

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“…The combined action of compounds in total giving higher effect than the individual effect is called synergistic inhibition effect. Synergistic studies of organic compounds with halides have been extensively studied [21,[34][35][36]. Addition of halides to corrosive media enhances the adsorption capacity of the inhibitors by bridging between inhibitor cations and negatively charged metal surface.…”

Section: Resultsmentioning

confidence: 99%

Synergistic Influence of Halide Ions on Corrosion Inhibition Performance of Gum Exudates of Azadirachta indica on Carbon Steel in Sulphuric Acid Medium

Manickam¹,

Dheenadhayalan²,

Jaganathan³

2018

Asian J. Chem.

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“…There are two reactions occurring, namely the anodic reaction and cathodic reaction. The equations 11 and 12 represent iron reaction in acidic solutions [26,27].…”

Section: Hydrogen Evolution Studiesmentioning

confidence: 99%

Thermodynamic, chemical and electrochemical investigation of pandanus tectorius extract as corrosion inhibitor for steel in sulfuric acid solutions

Al-Turkustani

2013

Eur. J. Chem.

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KEYWORDSThe corrosion inhibition characteristics of pandanus tectorius extract on corrosion of steel in 1 M H2SO4 were investigated using chemical and electrochemical measurements at various temperatures (30, 40, 50 and 60 °C). The effect of acid concentration on the corrosion rate of steel increases with acid concentration (0.25-2.00 M) showing first order corrosion reaction without changing the reaction mechanism. The results showed that when the concentration of pandanus tectorius extract increased from 5% to 15% (v:v), the rate of steel corrosion is decreased, which indicated that pandanus tectorius extract are good inhibitor for steel corrosion in 1 M H2SO4 at 30 °C and attains 88.02% at 15% (v:v) from weight loss method. Electrochemical results showed that the investigated extract was acted as mixed type inhibitor. The free energy of adsorption ΔGads for pandanus tectorius, indicates that the process was spontaneous and physically adsorbed (physisorption) onto the steel surface. Also, scanning electron microscopy (SEM) is used to support the obtained result. The trend of inhibition efficiency with temperature suggests physical adsorption of this extract on the corroding steel surface. Thermodynamic functions ∆Eapp, ∆H* and ∆S* has been calculated and are discussed.

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INHIBITION OF MILD STEEL CORROSION IN H₂SO₄USING EXUDATE GUM FROMPACHYLOBUS EDULISAND SYNERGISTIC POTASSIUM HALIDE ADDITIVES

Cited by 87 publications

References 39 publications

Synergistic and antagonistic effects between halide ions and carboxymethyl cellulose for the corrosion inhibition of mild steel in sulphuric acid solution

Synergistic and antagonistic effects between halide ions and carboxymethyl cellulose for the corrosion inhibition of mild steel in sulphuric acid solution

Synergistic Influence of Halide Ions on Corrosion Inhibition Performance of Gum Exudates of Azadirachta indica on Carbon Steel in Sulphuric Acid Medium

Thermodynamic, chemical and electrochemical investigation of pandanus tectorius extract as corrosion inhibitor for steel in sulfuric acid solutions

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