Effect of some peel extracts on the corrosion behavior of aluminum alloy in alkaline medium

Chaubey, Namrata; Singh, Vinod Kumar; Quraishi, M.A.

doi:10.1007/s40090-015-0054-8

Cited by 34 publications

(20 citation statements)

References 38 publications

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“…This result indicated that synthetic EPS may be considered as a mixed-type corrosion inhibitor (Kumar & Yadav, 2016) in the presence of CO 2 gas saturated 3.64% NaCl solution. The maximum displacement in E corr of less than 0.085 V suggests a mixed mode of inhibition (Chaubey, Singh & Quraishi, 2015). Mixed-type corrosion inhibitor retards corrosion rate by suppressing both anodic and cathodic corrosion reactions, typically by adsorbing on a metal surface, forming a protective film to reduce contact of metal surface from the corrosive environment (Myrdal, 2010).…”

Section: Effect Of Concentrationmentioning

confidence: 99%

Kinetic and thermodynamic analyses of the corrosion inhibition of synthetic extracellular polymeric substances

Depan

Holmes

et al. 2020

PeerJ Materials Science

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Background Extracellular polymeric substances (EPS) extracted from waste activated sludge (WAS) have previously shown its potential in corrosion inhibition. The aim of this study is to design a synthetic EPS formulation as a surrogate of natural WAS EPS to overcome the corrosion inhibition inconsistency in WAS EPS. The adsorption behavior of the designed inhibitor was studied by kinetic and thermodynamic analyses. Methods Synthetic EPS is a bio-inspired material that was formulated based on the most typical chemical compositions of natural WAS EPS, that is, proteins, carbohydrates, humic substances, nucleic acids, and uronic acids, which was not optimized for corrosion inhibition performance. It is a mixture of glutamic acid, carboxymethylcellulose, humic acid, thymine, and alginic acid. Its corrosion inhibition performance was tested with carbon steel in 3.64% NaCl saturated with CO2, using the potentiodynamic polarization scanning technique. The resulted electrochemical parameters were used to evaluate the empirical corrosion kinetic and thermodynamic adsorption parameters. Results Addition of synthetic EPS showed significant decrease in corrosion rate as compared to the control. The inhibition efficiency improved with increasing inhibitor concentration and temperature. The optimum performance was 94% with 204 mg/L of inhibitor applied at 70 °C (343 K). The inhibition performance was controlled by both the concentration of inhibitor and temperature. Chemisorption of the inhibitor molecules contributed to the overall inhibition performance, reducing the contact of metal with the corrosive environment, thus, slowing down the overall corrosion rate.

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Section: Effect Of Concentrationmentioning

confidence: 99%

Kinetic and thermodynamic analyses of the corrosion inhibition of synthetic extracellular polymeric substances

Depan

Holmes

et al. 2020

PeerJ Materials Science

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“…These solutions were then tested as inhibitors in the corrosion of 99.95% aluminium in 3% NaCl solution. Apart from this study, 82 all other research work was published on the inhibition of aluminium materials in alkaline (NaOH and KOH) [83][84][85][86][87][88][89][90][91][92][93][94][95][96] and acidic (HCl and H 2 SO 4 ) 9-11,85,93,97-107 solutions ( Table 3).…”

Section: The Corrosion Inhibition Of Plant Extracts Obtained With Solmentioning

confidence: 99%

Green corrosion inhibitors for aluminium and its alloys: a review

et al. 2017

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“…This result indicated that synthetic EPS may be considered as a mixed-type corrosion inhibitor [19] in the presence of CO 2 gas saturated 3.64% NaCl solution. The maximum displacement in E corr of less than 0.085 V suggests a mixed mode of inhibition [20]. Mixed-type corrosion inhibitor retards corrosion rate by suppressing both anodic and cathodic corrosion reactions, typically by adsorbing on a metal surface, forming a protective film to reduce contact of metal surface from the corrosive environment [21].…”

Section: Effect Of Concentrationmentioning

confidence: 99%

Peer Review #2 of "Kinetic and thermodynamic analyses of the corrosion inhibition of synthetic extracellular polymeric substances (v0.1)"

2020

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Background. Extracellular polymeric substances (EPS) extracted from waste activated sludge (WAS) have previously shown its potential in corrosion inhibition. The aim of this study is to design a synthetic EPS formulation as a surrogate of natural WAS EPS to overcome the corrosion inhibition inconsistency in WAS EPS. The adsorption behavior of the designed inhibitor was studied by kinetic and thermodynamic analyses. Methods. Synthetic EPS is a bio-inspired material that was formulated based on the most typical chemical compositions of natural WAS EPS, i.e. proteins, carbohydrates, humic substances, nucleic acids, and uronic acids, which was not optimized for corrosion inhibition performance. It is a mixture of glutamic acid, carboxymethylcellulose, humic acid, thymine, and alginic acid. Its corrosion inhibition performance was tested with carbon steel in 3.64% NaCl saturated with CO 2 , using the potentiodynamic polarization scanning technique. The resulted electrochemical parameters were used to evaluate the empirical corrosion kinetic and thermodynamic adsorption parameters. Results. Addition of synthetic EPS showed significant decrease in corrosion rate as compared to the control. The inhibition efficiency improved with increasing inhibitor concentration and temperature. The optimum performance was 94% with 204 mg/L of inhibitor applied at 70°C (343 K). The inhibition performance was controlled by both the concentration of inhibitor and temperature. Chemisorption of the inhibitor molecules contributed to the overall inhibition performance, reducing the contact of metal with the corrosive environment, thus, slowing down the overall corrosion rate.

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Effect of some peel extracts on the corrosion behavior of aluminum alloy in alkaline medium

Cited by 34 publications

References 38 publications

Kinetic and thermodynamic analyses of the corrosion inhibition of synthetic extracellular polymeric substances

Kinetic and thermodynamic analyses of the corrosion inhibition of synthetic extracellular polymeric substances

Green corrosion inhibitors for aluminium and its alloys: a review

Peer Review #2 of "Kinetic and thermodynamic analyses of the corrosion inhibition of synthetic extracellular polymeric substances (v0.1)"

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