A review of plant extracts as green corrosion inhibitors for CO2 corrosion of carbon steel

Fazal, Basit Raza; Becker, Thomas; Kinsella, Brian; Lepková, Kateřina

doi:10.1038/s41529-021-00201-5

Cited by 99 publications

(25 citation statements)

References 76 publications

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“…This mixture has various functional groups that can adsorb on the surface of the wire. 18 Compounds such as flavonoids, steroids, tannins, and terpenoids can adsorb on the surface of the wire. Flavonoids present in kiwi peel act as antioxidants by donating hydrogen atoms, by their ability to adhere to metals as glucosides (containing a glucose side chain), or in a free form called aglycone.…”

Section: Discussionmentioning

confidence: 99%

Changes in the corrosion rate and microstructure of beta titanium wire using kiwi peel extract

Lubis

Natarisya²

2023

Dent. J.

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Background: Beta titanium orthodontic wire is known to have good corrosion resistance but is weak in acidic environments, which advance the corrosion rate. One natural inhibitor that can be used to decrease corrosion is kiwi peel extract, which has a high antioxidant level. Purpose: This study aims to examine the ability of the extract to decrease the corrosion rate and microstructural changes of beta titanium at an acidic pH (pH 5). Methods: The samples used were beta titanium with a diameter of 0.016 x 0.022 in and a length of 6 cm. A total of 28 samples (n=28) were divided into four groups—a control group immersed in pH 5 artificial saliva and three treatment groups immersed in kiwi peel extract at concentrations of 400, 500, and 600 ppm (n=7), respectively. The samples were immersed for seven days at 37oC in an incubator. The corrosion rate was tested using the weight-loss method and microstructure change was analyzed using a scanning electron microscope (SEM). Results: One-way ANOVA showed that there are significant differences in corrosion rates between beta titanium immersed in artificial saliva and beta titanium immersed in kiwi peel extract with p=0.01 (p<0.05). SEM analysis results showed that the group with the least surface changes was the one immersed in 400 ppm of kiwi peel extract. Conclusion: Weight-loss and SEM methods show similar results. Kiwi peel extract proved to decrease the corrosion rate and changes in the microstructure of the wire most effectively at a concentration of 400 ppm.

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Section: Discussionmentioning

confidence: 99%

Changes in the corrosion rate and microstructure of beta titanium wire using kiwi peel extract

Lubis

Natarisya²

2023

Dent. J.

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“…Numerous techniques are used to slow corrosion including corrosion inhibitors (Fazal et al, 2022). Synthetic inhibitors have shown significant efficacy but remain highly toxic to humans and the environment either during their use or during the synthesis process (El Mouden and al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Inhibition of corrosion of an aluminum alloy by Rosemary and Eucalyptus extracted oils in 1M hydrochloric acid medium: Experimental and theoretical study

Laihemdi

Barhoumi

Zarri

et al. 2023

Preprint

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Corrosion is a common phenomenon in metals and alloys. It implies a degradation of material by chemical or electrochemical reactions with the environment. it undergoes a gradual loss of material at the points of contact with the surrounding environment. Among the various types of methods employed, one can use to prevent or retard the corrosion of metals and alloys, one applies a layer of paint, plastic or other protective material on the surface or one covers with a layer zinc. We can also apply an electric current to the surface of the metal to reduce the potential difference between the metal and the environment or even by formulating anti-rust solutions or choosing certain chemicals as anti-corrosion to slow down the corrosion process. The use of inhibitors is one of the best techniques that ensure the protection of metallic materials. This research aims to evaluate the inhibition efficiency of the rosemary (REO) and Eucalyptus Essential Oils (EEO) on aluminum in 1 M hydrochloric acid. The inhibition efficiency of the EOs will be examined using electrochemical methods such as potentiodynamic and potentiostatic polarization, and electrochemical impedance spectroscopy. The results of this research will provide valuable information on the potential use of REO and EEO as eco-friendly corrosion inhibitors for metals in aqueous media. The inhibitory efficiency increases with the concentration of inhibitors and reaches a maximum value of 62% for Eucalyptus and 92% for Rosemary. These results testify to the mixed nature of the two inhibitors Rosemary and Eucalyptus with an anodic predominance. The transient electrochemical method attests to higher charge transfer resistances accompanied by lower and lower double-layer capacitance values when the concentration of rosemary and Eucalyptus increases. These results justify the adsorption of these inhibitors on the metal surface. The results from the three techniques used present a reasonable agreement between them. After testing three adsorption isotherms, it was found that the adsorption mechanism follows the Langmuir isotherm. The calculation of the atomic charges by the DFT/B3LYP method is carried out to assess the protective character of an inhibitor molecule adsorbed namely p-Cymene and Eucalyptol main constituents of the rosemary and eucalyptus essential oil. Monte Carlo Simulations (MC) and Molecular Dynamics (MD) are undertaken at 25°C, to obtain the interaction energy between the two inhibitors and the Al (111) interface.

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“…Additionally, polymeric structures [ 13 ] and materials [ 14 ] have been utilized as inhibitors, although these substances are relatively expensive with low environmental benign properties and polarity. Keeping all these aspects in consideration, current studies focused on exploring natural products as eco-friendly and cost-effective organic inhibitors, including plant extracts [ 15 , 16 ], oleochemicals [ 17 ], natural gums [ 18 ], and bio-surfactants [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

An Integrated Experimental and Theoretical Studies on the Corrosion Inhibition of Carbon Steel by Harmal Extracts

Hammud

Maache²,

Otaibi

et al. 2022

Molecules

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The corrosion inhibition effect of the three extracts from Harmal roots (HRE), leaves (HLE), and flowers (HFE) were studied for carbon steel corrosion inhibition in 0.25 M H2SO4 solution. The electrochemical impedance study indicated that the three types of extracts decreased corrosion effectively through a charge transfer mechanism. Harmal roots and leaf extracts showed inhibition values of 94.1% and 94.2%, while it was 88.7% for Harmal flower extract at the inhibitor concentration of 82.6 ppm. Potentiodynamic polarization data revealed that Harmal extracts acted through predominant cathodic type inhibition. Both the corrosion current density and corrosion rate decreased significantly in the presence of Harmal extracts compared to blank solution. The corrosion rate (mpy) value was 63.3, 86.1, and 180.7 for HRE, HLE, and HFE, respectively. The adsorption-free energy change ΔGads (kJ·mol−1) values calculated from the Langmuir adsorption isotherm plots were for HRE (−35.08), HLE (−33.17), and HFE (−33.12). Thus, corrosion inhibition occurred due to the adsorption of Harmal extract on the carbon steel surface via the chemisorption mechanism. Moreover, a computational investigation using B3LYP/6-311G++(d,p) basis set in both gaseous and aqueous phases was performed for the major alkaloids (1–8) present in the Harmal extract.

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A review of plant extracts as green corrosion inhibitors for CO2 corrosion of carbon steel

Cited by 99 publications

References 76 publications

Changes in the corrosion rate and microstructure of beta titanium wire using kiwi peel extract

Changes in the corrosion rate and microstructure of beta titanium wire using kiwi peel extract

Inhibition of corrosion of an aluminum alloy by Rosemary and Eucalyptus extracted oils in 1M hydrochloric acid medium: Experimental and theoretical study

An Integrated Experimental and Theoretical Studies on the Corrosion Inhibition of Carbon Steel by Harmal Extracts

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