Use of Saraca ashoka extract as green corrosion inhibitor for mild steel in 0.5 M H2SO4

Saxena, Akhil; Prasad, Dwarika; Haldhar, Rajesh; Singh, Gurmeet; Kumar, Akshay

doi:10.1016/j.molliq.2018.02.104

Cited by 220 publications

(51 citation statements)

References 29 publications

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“…8(a) and (b) presents the plot of C/θ against C using θ values obtained for thermometric technique at various temperatures. In all cases, linear plots were obtained and the R 2 values are close to one (Table 6) suggesting that the adsorption of AEOTR and FEOTR molecules onto the carbon steel surface obeys Langmuir isotherm [16,22,[26][27][28][29]. Although the plots are linear with good correlation coefficient values, the slopes are more than unity indicating a deviation from ideal Langmuir adsorption equation.…”

Section: Adsorption Isotherm Investigationsmentioning

confidence: 73%

“…In the literature, the value of ΔG 0 ads equal to -20 kJmol -1 or less is taken to indicate physisorption involving electrostatic interaction between charged molecules whereas those in the order of -40 kJmol -1 or more is interpreted as chemisorption involving charge sharing or transfer from the inhibitors to the metal surface to form a kind of coordinate bond [11,5,15,[29][30][31][32]. From the values of ΔG 0 ads obtained in this present work, it can be deduced that adsorption mechanism of both inhibitors on high carbon steel surface may involve physisorption [14][15][16][17][18][19][20][21][22][23][24][25][26].…”

Section: Adsorption Isotherm Investigationsmentioning

confidence: 82%

“…Langmuir isotherm was found to be one of the best fit adsorption isotherm model to describe the adsorption of both AEOTR and FEOTR onto the high carbon steel surface. Langmuir isotherm is characterized by the following expression [15,26]:…”

Section: Adsorption Isotherm Investigationsmentioning

confidence: 99%

See 2 more Smart Citations

Inhibition Efficiency of Eco-friendly Green Inhibitors (Ocimum tenuiflorum Phytocompounds) on Corrosion of High Carbon Steel in HCl Environment using Thermometric and Electrochemical Methods

Ugi¹,

Obeten²,

Ikeuba³

2018

JAEC

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Corrosion inhibition behavior of crude alkaloids and flavonoids extracts of Ocimum tenuiflorum roots on the corrosion of high carbon steel in hydrogen chloride acid environment was studied using thermometric, electrochemical impedance spectroscopy and potentiodynamic polarization techniques. The phytocompounds showed excellent corrosion retardation ability on the high carbon steel metal in HCl acid environment. The alkaloids demonstrated a more reliable inhibition efficacy compared to flavonoids extracts with maximum inhibition efficiency of 98.1% and 93.6% respectively at a maximum concentration of 2.0 g/L. There was a noticeable increase in inhibition mitigation potential of the inhibitors with increasing concentration of extracts. A physical adsorption mechanism was recorded by the inhibitor and the Langmuir adsorption isotherm was well obeyed with correlation coefficient (R 2) at approximately 0.999. Results of electrochemical impedance spectroscopy and potentiodynamic polarization confirmed the strong adsorption of the inhibitors on the steel surface through the values of charge transfer resistance and corrosion current densities. The inhibitors proved to be stable ones on the metal and a spontaneous reaction process was recorded from the data derived from the Gibbs free energy of adsorption.

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Section: Adsorption Isotherm Investigationsmentioning

confidence: 73%

Section: Adsorption Isotherm Investigationsmentioning

confidence: 82%

See 1 more Smart Citation

Inhibition Efficiency of Eco-friendly Green Inhibitors (Ocimum tenuiflorum Phytocompounds) on Corrosion of High Carbon Steel in HCl Environment using Thermometric and Electrochemical Methods

Ugi¹,

Obeten²,

Ikeuba³

2018

JAEC

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“… 19 PAs isolated from different natural materials have already been described as a green adsorption corrosion inhibitor. 14 , 24 , 26 , 40 , 41 …”

Section: Resultsmentioning

confidence: 99%

“… 42 However, this study used neutral pH conditions, and even so, the CCO crude extract achieved equal or higher inhibition efficiency compared to studies with acid solutions and a shorter immersion time. 22 − 24 , 26 , 40 , 41 , 43 …”

Section: Resultsmentioning

confidence: 99%

Proanthocyanidins with Corrosion Inhibition Activity for AISI 1020 Carbon Steel under Neutral pH Conditions of Coconut (Cocos nucifera L.) Husk Fibers

et al. 2021

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Cocos nucifera L. is a palm tree (Arecaceae) with a high economic value. The coconut husk fibers are nonedible, thick, and abrasion-resistant and correspond up to 85% of biomass discarded as solid waste residue. Therefore, the husk fibers are an underexploited byproduct with a high content of extractives of unreported nature. Two varieties of C. nucifera L. husk extracts were investigated to uncover bioactive metabolites and their possible application as a green corrosion inhibitor for carbon steel AISI 1020 under neutral pH conditions. The chemical analysis indicated 3% (w/w) of proanthocyanidins in the husk fibers with a high B-type procyanidin content. The husk fibers’ crude extract showed promising results as an eco-friendly corrosion inhibitor for carbon steel AISI 1020 under neutral pH conditions. Although it formed a film on the metal surface in all tested concentrations (0.4, 0.8, 1.2, and 1.6 g L –1 ), the highest protective efficiency was shown at a concentration of 1.2 g L –1 , determined by electrochemical techniques and mass loss. This was the first comprehensive report on coconut husk fibers’ chemical composition, which was similar between the two varieties with potential for industrial application.

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Assessing bioorganic gum performance as a corrosion inhibitor in phosphoric acid medium: Electrochemical and computational analysis

Sathiyapriya¹,

Dhayalan²,

Jagadeeswari

et al. 2021

Materials & Corrosion

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The present investigation was aimed at exploring the anticorrosive behavior of bio‐organic Auraucaria heterophylla gum exudate (AHGE) on mild steel (MS) corrosion in 1 M phosphoric acid solution by weight loss technique, electrochemical studies, and computational analysis. Additionally, the performance was analyzed by morphological and quantum chemical analyses. The weight loss data revealed that AHGE showed 80% of inhibition efficiency at 303 K temperature. Inhibitor adsorption on MS was in line with Langmuir and Tempkin adsorption isotherms. Potentiodynamic studies showed that the investigated AHGE performed as a mixed‐type inhibitor. Electrochemical parameters like charge transfer resistance, double‐layer capacitance, and inhibition efficiency were determined and presented. Results obtained through computational analysis, scanning electron microscopy/energy dispersive X‐ray analysis, and atomic force microscopy studies were well supported by the inhibitive potential of AHGE.

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Use of Saraca ashoka extract as green corrosion inhibitor for mild steel in 0.5 M H2SO4

Cited by 220 publications

References 29 publications

Inhibition Efficiency of Eco-friendly Green Inhibitors (Ocimum tenuiflorum Phytocompounds) on Corrosion of High Carbon Steel in HCl Environment using Thermometric and Electrochemical Methods

Inhibition Efficiency of Eco-friendly Green Inhibitors (Ocimum tenuiflorum Phytocompounds) on Corrosion of High Carbon Steel in HCl Environment using Thermometric and Electrochemical Methods

Proanthocyanidins with Corrosion Inhibition Activity for AISI 1020 Carbon Steel under Neutral pH Conditions of Coconut (Cocos nucifera L.) Husk Fibers

Assessing bioorganic gum performance as a corrosion inhibitor in phosphoric acid medium: Electrochemical and computational analysis

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