Adsorption and Corrosion Inhibition Studies of Some Selected Dyes as Corrosion Inhibitors for Mild Steel in Acidic Medium: Gravimetric, Electrochemical, Quantum Chemical Studies and Synergistic Effect with Iodide Ions

Peme, Thabo; Olasunkanmi, Lukman O.; Bahadur, Indra; Adekunle, Abolanle S.; Kabanda, Mwadham M.; Ebenso, Eno E.

doi:10.3390/molecules200916004

Cited by 121 publications

(48 citation statements)

References 65 publications

(86 reference statements)

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“…The corrosion potential (E corr ) shifted to more negative potentials with the PLS concentration. Since the amount of this shift was less than 85 mV, this inhibitor is considered as a mixed type inhibitor with a predominating cathodic character (60).…”

Section: Pdp Resultsmentioning

confidence: 99%

A peony-leaves-derived liquid corrosion inhibitor: protecting carbon steel from NaCl

Nazari

Shihab

Cao

et al. 2017

Green Chemistry Letters and Reviews

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A liquid mixture was developed from waste peony leaves through a zero-waste chemical/biological process. The inhibition effect of different concentrations of peony leaves derived solution (0-3 vol.%, PLS0-3) on C1010 carbon steel in 3.5 wt.% NaCl was investigated over time using electrochemical measurements. Chemical analyses were performed to reveal the main compounds of this inhibitor. Surface analyses together with water contact angle measurements were employed to study the characteristics of the steel surface affected. Semi-empirical calculations with PM3 method were used to find the relationship between molecular structure and inhibiting effect of PLS. The inhibitor was stable over time and its main active ingredients were C 19 H 27 N 4 O 10 P and C 17 H 16 N 3 O 9 P that adsorb onto the steel surface, block cathodic active sites, make the surface hydrophobic, decrease the surface free energy, and facilitate the formation of a passive layer. A good correlation was found between experimentally determined inhibition efficiency and theoretically calculated properties of PLS.ARTICLE HISTORY

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Section: Pdp Resultsmentioning

confidence: 99%

A peony-leaves-derived liquid corrosion inhibitor: protecting carbon steel from NaCl

Nazari

Shihab

Cao

et al. 2017

Green Chemistry Letters and Reviews

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“…The surface coverage θ was subjected to the fitting of Langmuir adsorption isotherm through Equation (10) [56,60,[62][63][64]:…”

Section: Adsorption Isotherm Modelingmentioning

confidence: 99%

Effects of Phyllanthus muellerianus Leaf-Extract on Steel-Reinforcement Corrosion in 3.5% NaCl-Immersed Concrete

Okeniyi

Loto

Popoola

2016

Metals

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This paper investigates Phyllanthus muellerianus leaf-extract effects on steel-reinforcement corrosion in concrete immersed in 3.5% NaCl, simulating saline/marine environment. Different concentrations of the leaf-extract were admixed in steel-reinforced concrete samples, which were immersed, with normal control, in the test-environment, while positive control samples were immersed in distilled water. Electrochemical measurements of corrosion-rate (by linear-polarizationresistance instrument), corrosion-current (by zero-resistance-ammeter) and corrosion-potential (by high impedance multimeter) were obtained for assessing the reinforcing-steel corrosion. Analyzed results showed that the corrosion-rate exhibited excellent correlation (R = 98.82%, Nash-Sutcliffe Efficiency = 97.66%, ANOVA p-value = 0.0006) with function of the admixture concentration and of the corrosion noise-resistance (ratio of corrosion-potential and corrosion-current standard deviations). The 0.3333% Phyllanthus muellerianus (per weight of cement) exhibited optimal efficiency, η = 97.58% ± 1.28% (experimental) or 95.33% ± 4.25% (predicted), at inhibiting concrete steel-reinforcement corrosion in the test-environment, which compares well with the positive control performance model, η = 97.96% ± 0.03%. The experimental and predicted models followed the Langmuir adsorption isotherm, which indicated physisorption as the Phyllanthus muellerianus leaf-extract adsorption mechanism on the reinforcing-steel. These support suitability of the N-, S-, and O-containing and π-electron rich Phyllanthus muellerianus leaf-extract as an environmentally-friendly inhibitor for effective corrosion-protection of steel-reinforcement in concrete designed for the saline/marine environment.

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“…Therefore, the removal of the Allura red dye from aqueous solutions has a great importance. E 129 dye adsorption onto different adsorbents was reported using different analytical techniques such as potentiodynamic polarization (Peme et al, 2015), spectrophotometry (Bişgin et al, 2015, Zalacain et al, 2005, electrochemical methods (Alghamdi, 2005), HPLC (Zhang, 2015) and Fourier transform-infrared spectroscopic (FT-IR) analysis (Liang et al, 2015). Among these techniques, spectrophotometry stands out, as the most effective and convenient analytical techniques as compared to the others owing to its simplicity, low cost, and wide availability in most laboratories.…”

Section: Adsorption Properties Of E129 Dye and Activated Carbonmentioning

confidence: 99%

Adsorption of Food Coloring Allura Red Dye (E129) From Aqueous Solutions Using Activated Carbon

Alkahtani

Abu-Alrub

Mahmoud

2017

IJFAAS

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The adsorption behavior of Allura red (E129) from aqueous solutions onto activated carbon was successfully investigated. All factors affecting the adsorption process were carefully studied and the conditions were optimized. Adsorption of E129 onto activated carbon was found to increase by decreasing the mass of activated carbon, pH and ionic strength of the solution and by increasing temperature. Under the optimum conditions, the maximum adsorption capacity of activated carbon for E129 dye was 72.85 mg.g -1 . Three adsorption isotherm models; Langmuir, Freundlich and Temkin model were investigated regarding E129 adsorption onto activated carbon. The models' parameters KL, qm, R2, and (n) were determined and found to be 0.0222, 72.85 mg.g -1 , 0.9057-0.9984, and 0.992, respectively. Moreover, pseudo first-order and pseudo second-order kinetic models were applied to the adsorption data. The obtained data from adsorption isotherms, kinetic models, and thermodynamic parameters (the free energy change, enthalpy and entropy) indicated that E129 adsorption is spontaneous exothermic heterogeneous adsorption. Furthermore, the results showed that E129 adsorption onto activated carbon obeyed both Freundlich isotherm and pseudo second-order kinetic models.

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Adsorption and Corrosion Inhibition Studies of Some Selected Dyes as Corrosion Inhibitors for Mild Steel in Acidic Medium: Gravimetric, Electrochemical, Quantum Chemical Studies and Synergistic Effect with Iodide Ions

Cited by 121 publications

References 65 publications

A peony-leaves-derived liquid corrosion inhibitor: protecting carbon steel from NaCl

A peony-leaves-derived liquid corrosion inhibitor: protecting carbon steel from NaCl

Effects of Phyllanthus muellerianus Leaf-Extract on Steel-Reinforcement Corrosion in 3.5% NaCl-Immersed Concrete

Adsorption of Food Coloring Allura Red Dye (E129) From Aqueous Solutions Using Activated Carbon

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