Novel tetrazole-based symmetrical diselenides as corrosion inhibitors for N80 carbon steel in 1 M HCl solutions: Experimental and theoretical studies

El-Askalany, A. H.; Mostafa, Sahar I.; Shalabi, K.; Eid, Ahmed H.; Shaaban, Saad

doi:10.1016/j.molliq.2016.08.088

Cited by 56 publications

(12 citation statements)

References 68 publications

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“…Electrochemical frequency modulation (EFM) measurements were achieved via two frequencies 2 and 5 Hz. The base frequency was 0.1 Hz, so the waveform repeats after 1 s. The high peaks were utilized in order to compute the corrosion current density (i corr ), the Tafel slopes (β a and β c ) and the causality factors CF-2&CF-3 (34,35). The electrode potential was allocated to stabilize 30 min before starting all measurements.…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Assessment of theBassia muricataextract as a green corrosion inhibitor for aluminum in acidic solution

El-Katori

Al-Mhyawi

2019

Green Chemistry Letters and Reviews

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The inhibiting behavior of aluminum by the Bassia muricata extract was examined in 1.0 M H 2 SO 4 solution as a green corrosion inhibitor via weight loss, potentiodynamic polarization (PP), electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation (EFM) techniques. It was found that the addition of the extract reduces the corrosion rate of aluminum alloy. The inhibition efficiency increases with increasing extract concentration and reached 90% at 300 ppm. The inhibitive effect of the tested extract was discussed in view of adsorption of its components on the aluminum surface. The effect of the temperature on the corrosion behavior with the addition of different concentration of B. muricata extract was studied in the temperature range of 298 and 318 K. The B. muricata extract adsorption isotherm on the aluminum surface was followed the Temkin adsorption model. The activation and adsorption parameters were computed and discussed. Tafel plots showed that the B. muricata extract represented as a mixed type inhibitor. The surface morphology was examined via scanning electron microscopy (SEM) and atomic force microscopy (AFM) which confirmed the existence of a protective film of inhibitor molecule on the aluminum surface. The results revealed that the B. muricata extract was an effective inhibitor, and the inhibition efficiencies gained from all applied techniques were in good agreement.

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Section: Electrochemical Measurementsmentioning

confidence: 99%

Assessment of theBassia muricataextract as a green corrosion inhibitor for aluminum in acidic solution

El-Katori

Al-Mhyawi

2019

Green Chemistry Letters and Reviews

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“…A similar circuit was proposed in several works [41][42][43][44]. The constant phase element (CPE) is introduced to simulate the non-ideal capacitive behavior of cast iron/ HCl interface, and its impedance is defined as follows [43]: (8) Where Y 0 is a CPE constant, j is the imaginary number, ω is the angular frequency (ω = 2πf, f represents the AC frequency in Hz), n is a phase shift, which is related to the system homogeneity, when the CPE display a pure capacitance, n = 1. The electrical double layer capacitance (C dl ) was determined by the following equation [45]: 9The EIS parameters of the cast iron immersed in uninhibited and inhibited solutions are summarized in Table 1.…”

Section: Eis Studies At 25 O Cmentioning

confidence: 99%

“…Acidic solutions are widely employed in the industry for acid pickling and acid cleaning; they are also added to oil and gas production. It should be emphasized that hydrochloric acid (HCl) is the most used for this purpose [8,9]. Unfortunately, because of the presence of Clions this acid is highly corrosive.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Studies on Corrosion Inhibition Performance of Phenanthroline for Cast Iron in Acid Solution

Idir¹,

Kellou-Kerkouche

2018

J. Electrochem. Sci. Technol

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The corrosion inhibition of cast iron in 1 M HCl by Phenanthroline (Phen) was investigated using potentiodynamic polarization (PDP) curves, electrochemical impedance spectroscopy (EIS), surface analysis and theoretical calculations. It is found that Phen exhibits high inhibition activity towards the corrosive action of HCl and its adsorption obeys the Langmuir adsorption isotherm model. The results showed that inhibition efficiency increases with Phen concentration up to a maximum value of 96% at 1.4 mM, and decreases slightly with the increase in temperature. The free adsorption energy value indicates that Phen adsorbs on cast iron surface in 1 M HCl via a simultaneous physisorption and chemisorption mechanism. Scanning electron microscopy (SEM) micrographs, atomic force microscopy (AFM) and FTIR analysis confirmed the formation of a protective film on cast iron surface, resulting in the improvement of its corrosion resistance in the studied aggressive solution. Quantum chemical calculations at the DFT level were achieved to correlate electronic structure parameters of Phen molecules with their adsorption mode.

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“…There is only one phase maximum in Bode plot ( Figure 3), and this appears only one relaxation process. This can be assigned to the charge transfer process, which occurred between the metal surface and electrolyte [36]. The C dl values were estimated from phase element CPE circuit (Figure 4), and calculated from by Equation (3) [37]:…”

Section: Analysis Of Ac Impedance Spectramentioning

confidence: 99%

Inhibitive effect of Artemisia Judaica Herbs extract on the corrosion of carbon steel in hydrochloric acid solutions

Fouda¹,

El-Abbasy²,

A.A.El-Sherbini³

2018

Int. J. Corros. Scale Inhib.

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Artemisia Judaica herb extract (AJH) was tested as an eco-friendly corrosion protection of carbon steel (CS) in 1.0 M hydrochloric acid as attacking medium utilizing non electrochemical methods (mass reduction (MR)), and electrochemical methods such as (EIS) AC electrochemical impedance spectroscopy, and (PP) Tafel polarization tests. The obtained data revealed that the protective efficiency increased with increasing extract dose and also increased with increasing temperature. Surface examination was performed by (AFM) atomic force microscope (in order to determine the degree of roughness of the CS surface), (SEM) scanning electron microscope (in order to determine the film formed on CS surface) and (FT-IR) Fourier transforms infrared spectroscopy (in order to determine the adsorbed groups on CS surface). These tests revealed that the extract molecules form a film on CS surface. The AJH extract was adsorbed physically and spontaneously on CS surface and follows Langmuir's isotherm. The adsorption (K ads ,

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Novel tetrazole-based symmetrical diselenides as corrosion inhibitors for N80 carbon steel in 1 M HCl solutions: Experimental and theoretical studies

Cited by 56 publications

References 68 publications

Assessment of theBassia muricataextract as a green corrosion inhibitor for aluminum in acidic solution

Assessment of theBassia muricataextract as a green corrosion inhibitor for aluminum in acidic solution

Experimental and Theoretical Studies on Corrosion Inhibition Performance of Phenanthroline for Cast Iron in Acid Solution

Inhibitive effect of Artemisia Judaica Herbs extract on the corrosion of carbon steel in hydrochloric acid solutions

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