XPS and DFT investigations of corrosion inhibition of substituted benzylidene Schiff bases on mild steel in hydrochloric acid

Hashim, Nor Hashima; Anouar, El Hassane; Kassim, Karimah; Zaki, Hamizah Mohd; Alharthi, Abdulrahman I.; Embong, Zaidi

doi:10.1016/j.apsusc.2019.01.149

Cited by 179 publications

(62 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This extra peak can be ascribed to the coordinated nitrogen atom of the amino group with the metal surface (N–Fe bond) [ 44 ]. Other authors also suggested that this peak could be attributed to the bond between the nitrogen of the amino groups and the oxide layer on the metal surface (FeO x ) [ 45 ].…”

Section: Resultsmentioning

confidence: 99%

“…The heteroatoms (i.e., O, N) present on the GA molecules by virtue of the presence of lone pair of electrons may promote the adsorption of the inhibitor via the formation of coordinate bonds with the iron from the metal surface and/or with iron from the oxide species formed on the surface [ 45 ] ( Figure 16 c). The XPS measurements observed in this study showed a peak at 397.6 eV likely ascribed to the coordinated nitrogen atom of the amino group with the Fe (N–Fe bond) [ 44 ].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Effect of CO2 Partial Pressure on the Corrosion Inhibition of N80 Carbon Steel by Gum Arabic in a CO2-Water Saline Environment for Shale Oil and Gas Industry

et al. 2020

View full text Add to dashboard Cite

The effect of CO2 partial pressure on the corrosion inhibition efficiency of gum arabic (GA) on the N80 carbon steel pipeline in a CO2-water saline environment was studied by using gravimetric and electrochemical measurements at different CO2 partial pressures (e.g., PCO2 = 1, 20 and 40 bar) and temperatures (e.g., 25 and 60 °C). The results showed that the inhibitor efficiency increased with an increase in inhibitor concentration and CO2 partial pressure. The corrosion inhibition efficiency was found to be 84.53% and 75.41% after 24 and 168 h of immersion at PCO2 = 40 bar, respectively. The surface was further evaluated by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), grazing incidence X-ray diffraction (GIXRD), and X-ray photoelectron spectroscopy (XPS) measurements. The SEM-EDS and GIXRD measurements reveal that the surface of the metal was found to be strongly affected by the presence of the inhibitor and CO2 partial pressure. In the presence of GA, the protective layer on the metal surface becomes more compact with increasing the CO2 partial pressure. The XPS measurements provided direct evidence of the adsorption of GA molecules on the carbon steel surface and corroborated the gravimetric results.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Effect of CO2 Partial Pressure on the Corrosion Inhibition of N80 Carbon Steel by Gum Arabic in a CO2-Water Saline Environment for Shale Oil and Gas Industry

et al. 2020

View full text Add to dashboard Cite

show abstract

“…With the XPS‐peak‐differentiation‐imitating analysis, the XPS deconvolution scans for N1 s and O1 s spectra were carried out, in which the black number mark refers to the binding energy while the red number mark means the peak area. As illustrated in Figure C, before ADT treatment, the peak with binding energy (BE) of 402.10 eV stands for NC from quaternary ammonium groups, the peak with binding energy (BE) of 399.8 eV is attributed to NC from primary amine, secondary amine, and acetamido group while the peak component with BE at 399.15 eV arises from NC which is the evidence of the Schiff base reaction existence between GA and CS. After ADT treatment, as we can see in Figure D, most quaternary‐N can be reserved and the intensity value of it decreases from 4010.1 to 3126.25 due to the Hofmann elimination and the S N 2 substitution reaction.…”

Section: Resultsmentioning

confidence: 99%

Application of a novel PUB enhanced semi‐interpenetrating chitosan‐based anion exchange membrane

2019

View full text Add to dashboard Cite

Summary A novel OH− conducting membrane containing chitosan (CS), poly‐(acrylamide‐co‐diallyldimethylammonium chloride) (PAADDA) and linear structured poly‐bis (2‐chloroethyl) ether‐1,3‐bis [3‐(dimethylamino)propyl] urea copolymer (PUB) was synthesized via a solution‐casting method and subsequently modified by hot treatment and chemical cross‐linking. The structural characterizations of scanning electron microscope (SEM), atomic force microscope (AFM), Fourier transform infrared spectra (FT‐IR), and X‐ray photoelectron spectroscopy (XPS) were carried out, showing that CS, PAADDA, and PUB formed a compact interpenetrating polymer network structure without apparent phase separation phenomenon under the help of cross‐linking. By changing the content of PUB in the membrane, the application performance such as mechanical properties, thermal gravimetric (TG) analysis, water uptake (WU), OH− conductivity ( σOH−) and ion exchange capacity (IEC) were investigated to evaluate the feasibility for alkaline membrane fuel cells. The maximum OH− conductivity could be reached up to 3.12 × 10−2 S cm−1 at 80°C in a mass ratio of CS/PAADDA/PUB (1:0.5:0.5) while a good tensile strength of 22.73 MPa and an excellent elongation at break of 23.55% could be obtained in a mass ratio of CS/PAADDA/PUB (1:0.5:0.25). Furthermore, the membrane also exhibited relatively high oxidative stability as well as excellent alkaline resistance stability, when conditioned in 30% H2O2 solution at ambient temperature for 120 hours and 8 M KOH solution at 60°C for 320 hours, respectively. Membrane electrode assemblies (MEAs) achieved a peak power density of 38.1 mW cm−2 at the maximum current density of 73.2 mA cm−2 in a H2/O2 system at room temperature. PUB was successfully introduced into the CS‐based membrane to improve the conductivity. Maximum OH− conductivity reached 0.016 S cm−1 at room temperature. Tensile strength of the prepared membrane could reach up to 22.73 MPa. The prepared membrane exhibited an excellent elongation at break of 23.55%. The membrane showed good oxidative stability and excellent alkaline resistance stability.

show abstract

“…The N1s spectra of CD1 (Figure 13 c) and CD2 ( Fig. 15 b) shows two peaks at 399.5, [41] 401.6 [42] and 398.6, [43] 400.5 eV [42] respectively, which could be allotted to the NÀ Fe and positively charged nitrogen (-N + ). The deconvulation of O1s spectra of CD1 (Figure 13 d) could be fitted into two peaks, at 531.2 eV, corresponding to the O 2À associated to the oxygen atom bonded with Fe 2 O 3 and Fe O 4 oxides [46] and 531.2 eV attributed to the C=O bond.…”

Section: Xps Analysismentioning

confidence: 99%

“…The peaks of CD1 and CD2 at binding energy at 726.5 and 725.3 eV respectively attributed to Fe 2p1/2 are properties of Fe (II) species. [43] 2.8. SEM analysis SEM micrographs of MS coupons were taken before and after submerged in 15 % HCl solution with and without CD1 and CD2 as reflected in Figure 16.…”

Section: Xps Analysismentioning

confidence: 99%

Carbon Dots as Green Corrosion Inhibitor for Mild Steel in HCl Solution

Saraswat

Yadav

2020

ChemistrySelect

View full text Add to dashboard Cite

Two carbon dots namely, S, N co-doped (CD1) and N doped (CD2) were synthesized by solvothermal treatment of pyromelletic acid in presence of thiourea, urea and DETA at 180°C. The synthesized carbon dots were characterized by Fourier Transform Infrared Spectroscopy (FTIR), Transmission electron microscopy (TEM) and Raman spectroscopy analysis. The dimension of synthesized carbon dots were found in the range of 1.63 nm to 2 nm with significant graphitic carbons. These carbon dots (CD1 and CD2) were used as green corrosion inhibitor to mitigate corrosion of mild steel (MS) in 15 % HCl solution using gravimetric and electrochemical methods. Studied carbon dots, CD1 and CD2 exhibited inhibition efficiency of 96.40 and 90.00 %, respectively, at 100 ppm concentration and 303 K temperature. The observed corrosion inhibition occurs due to adsorption of the carbon dots to the MS surface. Both the carbon dots follow Langmuir adsorption isotherm model and show physisorption on the MS surface. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) analysis was used to study the morphology of the uninhibited and inhibited surface of the sample. The interaction of the carbon dots and composition of adsorbed layer on the MS surface was confirmed using X-ray photoelectron spectroscopy (XPS). The XPS analysis revealed that heteroatoms present in the structural moiety of the carbon dots efficiently binds on the MS surface.

show abstract

XPS and DFT investigations of corrosion inhibition of substituted benzylidene Schiff bases on mild steel in hydrochloric acid

Cited by 179 publications

References 47 publications

Effect of CO2 Partial Pressure on the Corrosion Inhibition of N80 Carbon Steel by Gum Arabic in a CO2-Water Saline Environment for Shale Oil and Gas Industry

Effect of CO2 Partial Pressure on the Corrosion Inhibition of N80 Carbon Steel by Gum Arabic in a CO2-Water Saline Environment for Shale Oil and Gas Industry

Application of a novel PUB enhanced semi‐interpenetrating chitosan‐based anion exchange membrane

Carbon Dots as Green Corrosion Inhibitor for Mild Steel in HCl Solution

Contact Info

Product

Resources

About