A theoretical and experimental study of castor oil-based inhibitor for corrosion inhibition of mild steel in acidic medium at elevated temperatures

Farhadian, Abdolreza; Rahimi, Alireza; Safaei, Nehzat; Shaabani, Alireza; Abdouss, Majid; Alavi, A.

doi:10.1016/j.corsci.2020.108871

Cited by 208 publications

(75 citation statements)

References 74 publications

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“…Based on the data, the average deviation factor value was 0.998, which suggests that the mild steel corrosion in the presence and absence of EFB-H deviated by only 2% from the ideal circuit. The deviation observed in the study is far lower than those reported in the literature [ 8 , 27 , 66 , 67 ]. Hence it is possible to deduce that the mild steel surface inhomogeneity used in the study was not severe.…”

Section: Resultscontrasting

confidence: 78%

Innovative Method for Longer Effective Corrosion Inhibition Time: Controlled Release Oil Palm Empty Fruit Bunch Hemicellulose Inhibitor Tablet

et al. 2021

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This study aims to develop a controlled release oil palm empty fruit bunch hemicellulose (EFB-H) inhibitor tablet for mild steel in 1 M HCl. As plant extracts tend to deteriorate at longer immersion time, limiting its industrial applicability, we attempted to lengthen the inhibition time by forming a controlled release inhibitor tablet. Electrochemical methods (potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS)) were employed to investigate the efficiency and mechanism of the inhibition. An optimum dosage and immersion time was determined via Response Surface Methodology (RSM). EFB-H tablet was formulated using D-optimal mixture design, and its anticorrosion action at extended immersion time was compared with EFB-H powder. PDP measurement revealed that EFB-H is a mixed type inhibitor. RSM optimization unveiled that the optimum point for a maximum inhibition efficiency (87.11%) was at 0.33 g of EFB-H and 120 h of immersion time. Tablet T3 with EFB-H to gum Arabic to hydroxypropyl methylcellulose ratio of 66:0:34 portrayed the best tensile strength (0.243 MPa), disintegration time (152 min) and dissolution behavior. EFB-H tablet exhibited a longer-lasting inhibition effect than powder, which was 360 h as compared to 120 h for powder. Overall, EFB-H tablet has been successfully developed, and its enhanced effective inhibition time has been experimentally proven.

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Section: Resultscontrasting

confidence: 78%

Innovative Method for Longer Effective Corrosion Inhibition Time: Controlled Release Oil Palm Empty Fruit Bunch Hemicellulose Inhibitor Tablet

et al. 2021

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“…This layer is formed between the steel surface and the electrolyte. Thus, the adsorption of organic molecules on the steel surface can affect the impedance parameters of this layer [ 47 ]. Figure 14 a shows Nyquist plots measured during the corrosion of the MS specimens in 1 M HCl solution at 298 K. The Nyquist plots in both the uninhibited and inhibited MS specimens exhibited one depressed semi-circle.…”

Section: Resultsmentioning

confidence: 99%

Corrosion Inhibition of Mild Steel and 304 Stainless Steel in 1 M Hydrochloric Acid Solution by Tea Tree Extract and Its Main Constituents

2021

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Tea tree extract, containing antioxidant constituents α-terpineol, terpinen-4-ol, and α-terpinene, has a wide range of applications in the cosmetic, food, and pharmaceutical industries. In this study, tea tree extract showed an anticorrosive effect under 1 M HCl solution on mild steel (MS) and 304 stainless steel (STS). Uniform corrosion for MS and pitting corrosion for STS at 298 K were retarded, with inhibition efficiencies of 77% and 86%, respectively. The inhibition of uniform and pitting corrosion was confirmed by scanning electron microscopy and laser scanning confocal microscopy in terms of surface roughness and pitting morphologies. The most effective constituent contributing to the inhibitory performance of tea tree extract was revealed to be α-terpineol, with an inhibition efficiency of 83%. The adsorption of tea tree extract was confirmed by surface characterization analysis using Fourier transform infrared spectroscopy, Raman spectroscopy, and Electrochemical impedance spectroscopy. Interestingly, G- and D-peaks of Raman spectra were detected from the inhibited steels, and this finding is the first example in the corrosion inhibition field. The anticorrosion mechanism can be explained by the formation of organic-Fe complexes on the corroded steel surface via electron donor and acceptor interactions in the presence of an oxygen atom of the hydroxyl group or ether of organic inhibitors.

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“…Thus, at this high rate of reaction, the Inhibitor molecules will tend to adhere to the surface of the carbon steel faster but because of the acidity of the solution, there may also be a counter reaction of desorption of the inhibitor from the surface of the carbon steel as well due to the faster rate of reaction which then leads to instability of the protective film covering (Lgaz et al, 2017) The Temperature can be said to have two conflicting effect. With a rise in Temperature, the Corrosion rate shows increase and decrease with respect to the solubility limit of Iron Carbonate Layer (Farhadian et al, 2020). At the non-film forming conditions (Low pH), increasing the Temperature results to an increase in the Corrosion rate and a decrease in the efficiency (Li et al, 2019).…”

Section: Weight Loss Measurementmentioning

confidence: 99%

The Use of Citrullus Lanatusfor Corrosion Inhibition of A36 Steel in a CO2Saturated Saline Solution: A Thermodynamic and Kinetic Model Approach

Agbonkhese²,

Ohwojeheri³

2020

IJASRE

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Citrullus lanatus was tested for its suitability as an Inhibitor on Mild Carbon Steel in a Carbon (IV) Oxide (CO2) saturated saline solution. The mechanism of corrosion was investigated with and without Inhibitor additive in order to compare the effectiveness of the Inhibitor. Thermodynamic computations namely Enthalpy, Entropy and Gibbs free energy were used to determine the Inhibitive property of the Citrullus lanatus Extract. In addition, four Kinetic Models namely; Langmuir, Temkin, Flory-Huggins and Frumkin were also used to fit the experimental data. Gas Chromatography Mass Spectroscopy and Fourier Transfer Infrared Spectroscopy were used to characterize the Watermelon Seed Extract. Analysis of the results shows that Inhibitor efficiency decreases with increasing Temperature. The result also shows Inhibition efficiency within the range of 17.39%-71.79%. From the Result, the test sample without Inhibitor has the least Activation Energy in comparison with those with Inhibitor additives. The investigation also revealed that the Frumkin model at 50oC best fits the Experimental data with a Coefficient of determination, R2 of 99.9%, though; the other Models also fit the Experimental data.

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A theoretical and experimental study of castor oil-based inhibitor for corrosion inhibition of mild steel in acidic medium at elevated temperatures

Cited by 208 publications

References 74 publications

Innovative Method for Longer Effective Corrosion Inhibition Time: Controlled Release Oil Palm Empty Fruit Bunch Hemicellulose Inhibitor Tablet

Innovative Method for Longer Effective Corrosion Inhibition Time: Controlled Release Oil Palm Empty Fruit Bunch Hemicellulose Inhibitor Tablet

Corrosion Inhibition of Mild Steel and 304 Stainless Steel in 1 M Hydrochloric Acid Solution by Tea Tree Extract and Its Main Constituents

The Use of Citrullus Lanatusfor Corrosion Inhibition of A36 Steel in a CO2Saturated Saline Solution: A Thermodynamic and Kinetic Model Approach

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