Corrosion inhibition effect of pyrazole derivatives on mild steel in hydrochloric acid solution

Yadav, Mahendra; Sinha, Rajesh Ranjan; Sarkar, Tarun Kanti; Tiwari, Nidhi

doi:10.1080/01694243.2015.1040979

Cited by 67 publications

(17 citation statements)

References 35 publications

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“… Inhibitor Δ H * (kJ mol −1 ) Δ S * (J mol −1 K −1 ) , kJ mol −1 Type of adsorption Ref. Polypropylene glycol 57.7 −120 −29.2 Mixed type 14 Propargyl alcohol 21.7 21.8 −25.7 Mixed type 54 5-(4-methoxyphenyl)-3-(4-methylphenyl)4,5-dihydro-1H-pyrazol-1-yl-(pyridin-4-yl)methanone −64.3 −88 −39.7 Mixed type 55 1-diphenylaminomethyl-3-(1-N-dithiooxamide) iminoisatin −58.7 49.4 −38.2 Mixed type 56 Xanthan gum-graft-poly(acrylamide) 98.8 92.3 −24.01 Mixed type 57 …”

Section: Resultsmentioning

confidence: 99%

Highly efficient eco-friendly corrosion inhibitor for mild steel in 5 M HCl at elevated temperatures: experimental & molecular dynamics study

El-Haddad

Radwan

Sliem

et al. 2019

Sci Rep

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Laurhydrazide N′-propan-3-one was used as an eco-friendly inhibitor for the corrosion of mild steel in 5 M HCl at elevated temperatures. Various electrochemical techniques and surface characterization methods were utilized in this study. In addition, the kinetics and thermodynamic parameters were calculated and discussed. Furthermore, a geometry optimization of LHP was performed and the time-dependent density functional theory was utilized to calculate the electronic absorption spectra. Finally, frequency calculations were, also, performed on the optimized geometry.

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Section: Resultsmentioning

confidence: 99%

Highly efficient eco-friendly corrosion inhibitor for mild steel in 5 M HCl at elevated temperatures: experimental & molecular dynamics study

El-Haddad

Radwan

Sliem

et al. 2019

Sci Rep

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“…The values of K ads and Δ G ° ads are given in Table 3 . The negative values of Δ G ° ads ensure the spontaneity of the adsorption process and the stability of the adsorbed film on the steel surface 47 . Generally, values of Δ G ° ads ≤ −20 kJ mol −1 signify physisorption, and values more negative than −40 kJ mol −1 signify chemisorption.…”

Section: Resultsmentioning

confidence: 99%

An impending inhibitor useful for the oil and gas production industry: Weight loss, electrochemical, surface and quantum chemical calculation

Singh

Ansari

et al. 2017

Sci Rep

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The influence of a Schiff base namely N,N′-(pyridine-2,6-diyl)bis(1-(4-methoxyphenyl) methanimine) (PM) on the corrosion of J55 and N80 steel in 3.5 wt.% NaCl solution saturated with CO2 was evaluated using weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), X-ray diffraction (XRD), contact angle, scanning electron microscopy (SEM), atomic force microscopy (AFM) and scanning electrochemical microscopy (SECM). Potentiodynamic polarization results suggested that the inhibitor acted as a mixed type inhibitor by reducing both anodic and cathodic reactions. The adsorption of PM on the J55 and N80 steel surface obeyed the Langmuir adsorption isotherm. XRD, contact angle, SEM, AFM and SECM studies revealed that the surface of the metal was quite unaffected after the addition of inhibitor. Quantum chemical calculations and molecular dynamic simulation support the experimental results well.

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“…Table 6 depicts the thermodynamic functions for the dissolution of the mild steel without and with optimum concentrations of the inhibitors at various temperatures which were calculated. The negative values ∆H and ∆G and the positive value of ∆S may be attributed to spontaneous adsorption of the [32]. The results in Table 6 have values of ∆G closer to −40 KJ•mol −1 indicating that the adsorption mechanism of the inhibitor compounds on the mild steel was typical of chemisorption.…”

Section: Resultsmentioning

confidence: 87%

Corrosion Inhibitory Studies of Novel Schiff Bases Derived from Hydralazine Hydrochloride on Mild Steel in Acidic Media

Njong¹,

Ndosiri²,

Nfor³

et al. 2018

OJPC

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The inhibition performance of 1-hydralazinophthalazine (HPZ) (1), and syn-thesized1-(2-[(5-methylfuran-2-yl)methylene)] hydrazono) phthalazine (MFHPZ) (2), 1-(phthalazin-1(2H)-one) [(pyridin-2-yl) ethylidene] hydrazone (ACPHPZ) (3) and (2-acetylthiophene hydrazono) phthalazine (ACTHPZ) (4) has been investigated for mild steel in 1 M HCl. Compound 4 shows maximum inhibition efficiency of 93% at 5.0 × 10 −3 M concentration. The evaluation of thermodynamics and activation parameters indicated spontaneous adsorption of the inhibitor molecules which takes place through chemisorption. The adsorption of 3 and 2 follows Langmuir adsorption isotherm and Temkin adsorption isotherm for 4 and 1. The inhibitor efficiency was of the order 4 > 3 > 1 > 2. Impedance study for the representative inhibitor compounds 4 and 3 showed that decrease in charge transfer resistance is responsible for effective protection of mild steel surface by the tested inhibitor.

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Corrosion inhibition effect of pyrazole derivatives on mild steel in hydrochloric acid solution

Cited by 67 publications

References 35 publications

Highly efficient eco-friendly corrosion inhibitor for mild steel in 5 M HCl at elevated temperatures: experimental & molecular dynamics study

Highly efficient eco-friendly corrosion inhibitor for mild steel in 5 M HCl at elevated temperatures: experimental & molecular dynamics study

An impending inhibitor useful for the oil and gas production industry: Weight loss, electrochemical, surface and quantum chemical calculation

Corrosion Inhibitory Studies of Novel Schiff Bases Derived from Hydralazine Hydrochloride on Mild Steel in Acidic Media

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