Maltodextrin for corrosion mitigation of zinc in sulfamic acid: Electrochemical, surface and spectroscopic studies

Pais, Mikitha; Rao, Padmalatha

doi:10.1016/j.ijbiomac.2019.12.197

Cited by 23 publications

(11 citation statements)

References 58 publications

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“…This suggests that Curam drug adsorbs at metal/ electrolyte interfaces and act as an interface type of inhibitor. 36 EIS parameters in Table 5, are obtained by fitting using the corresponding equivalent circuit diagram as shown in Figure 5b, where R s and R ct represent the solution resistance between the metal electrode and the reference electrode and the chargetransfer resistance corresponding with the corrosion reaction at the metal /solution interface, respectively. The double layer capacitance (C dl ) is placed in parallel to the charge transfer resistance (R ct ) due to the charge transfer reaction.…”

Section: Eis Measurementsmentioning

confidence: 99%

Evaluation of Curam drug as an ecofriendly corrosion inhibitor for protection of stainless steel‐304 in hydrochloric acid solution: Chemical, electrochemical, and surface morphology studies

El‐Haddad

Fouda

2020

J Chinese Chemical Soc

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In the present work, the Curam drug was used as an eco-friendly corrosion inhibitor for the protection of stainless steel 304 (SS-304) in 2.0 M HCl solution. The inhibition efficiency was determined by mass loss (ML), Potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS) measurements. The surface morphology analysis carried out using Fourier transform infrared spectroscopy (FT-IR) and atomic force microscopy (AFM). ML data prove that with an increase in the temperature, Curam still exhibits good anti-corrosion performance. The inhibition efficiency of Curam can still be maintained at about 72% at 318 K. The data of electrochemical measurements indicate that Curam is the mixed-type inhibitor. The adsorption process of Curam on the SS-304 surface obeys the Langmuir adsorption isotherm. FT-IR and AFM analysis showed the excellent inhibition performance of Curam for SS-304 dissolution in an acidic medium. The data obtained by chemical and electrochemical measurements are in good agreement with one another.

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Section: Eis Measurementsmentioning

confidence: 99%

Evaluation of Curam drug as an ecofriendly corrosion inhibitor for protection of stainless steel‐304 in hydrochloric acid solution: Chemical, electrochemical, and surface morphology studies

El‐Haddad

Fouda

2020

J Chinese Chemical Soc

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“…The values such as average surface roughness (R a ), root mean square roughness (R q ), and R max values derived from AFM studies are provided in Table 6. It is clear from the results of R a , R q, and (P-V) that for the inhibited sample, the values are much lower than in the absence of pectin (Pais and Rao 2020). This is a clear indication of the adsorbed pectin on the surface of the EN8 steel.…”

Section: Atomic Force Microscopy (Afm) Analysismentioning

confidence: 83%

Chemical, electrochemical, thermodynamic and adsorption study of EN8 dual-phase steel with ferrite-martensite structure in 0.5 M H2SO4 using pectin as inhibitor

et al. 2021

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This paper presents the corrosion and inhibition behavior of heat-treated EN8 dual-phase steel with ferrite-martensite structure with pectin in 0.5 M sulphuric acid. The corrosion studies were performed using the weight loss method, electrochemical techniques such as potentiodynamic polarization measurements, and impedance spectroscopy. The study was done at different concentrations of pectin in the temperature range of 40 to 70 °C and immersion time of 1, 3, 5, and 7 h. The results showed that the inhibition performance of pectin has enhanced with an increase in pectin concentration and decreased with the temperature and time of exposure. From the weight loss study, highest inhibition efficiency of 76.43% was achieved at 5.0 g/L at 1 h of exposure at 40 °C. The maximum inhibition efficiency of 62% was obtained with 5.0 g/L of pectin at 40 °C by potentiodynamic polarization method. The energy, enthalpy, and entropy of activation and also thermodynamic parameters like free energy, enthalpy, and entropy of adsorption were assessed and discussed. Appropriate adsorption isotherm was fit to the obtained experimental outcomes and achieved Langmuir adsorption isotherm to be the best fit and obeyed physical adsorption. Surface analysis: scanning electron microscopy, X-ray diffraction techniques, atomic force microscopy, and energy dispersive X-ray were done with and without the addition of pectin. The metal surface appears to be uniform and smooth in the presence of pectin and adsorption was confirmed by surface analysis.

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“…The values of maximum roughness R max were 197 nm for polished, 5025 nm for corroded, and 1990 nm for the inhibited surface. This is a clear indication of the adsorbed pectin on the surface of the AISI1040 steel (Pais & Rao, 2020), due to a decrease in the R max value for the inhibited sample surface when compared with the corroded sample roughness value.…”

Section: Sem and Afm Analysismentioning

confidence: 93%

Corrosion inhibition of ferrite bainite AISI1040 steel in H₂SO₄ using biopolymer

Prabhu

Chaturvedi

et al. 2021

Cogent Engineering

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The purpose of this study is to investigate the corrosion behavior of the ferrite-bainite phase of AISI1040 steel and its corrosion inhibition using pectin in 0.5 M sulphuric acid medium. The corrosion study was conducted through weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) measurements. The study was conducted within the temperature range of 313-343 K and immersion time of 1 h-7 h. The inhibition performance of pectin has boosted with an increase in the concentration of pectin and decreased with the temperature and time of exposure. From the weight loss study, the highest inhibition efficiency of 85% was achieved at 5.0 g/L at 1 h of exposure at 40 °C. The activation, thermodynamic, and adsorption isotherm were adapted for the experimental results. The energy and enthalpy of activation emphasized on energy barrier for the corrosion process. The entropy of activation values is negative, indicating the association of molecules. The physical adsorption of pectin on the metal surface was confirmed by the free energy of adsorption (close to-20kj mol −1 ). The enthalpy of adsorption indicated the exothermic process and, arrangement of the molecules on the surface of the metal expressed by the entropy of adsorption. The optimum efficiency of 74.9% is achieved for the addition of 5.0 g/L of pectin at 313 K by the EIS technique. Surface analyses involving a scanning electron microscope and

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Maltodextrin for corrosion mitigation of zinc in sulfamic acid: Electrochemical, surface and spectroscopic studies

Cited by 23 publications

References 58 publications

Evaluation of Curam drug as an ecofriendly corrosion inhibitor for protection of stainless steel‐304 in hydrochloric acid solution: Chemical, electrochemical, and surface morphology studies

Evaluation of Curam drug as an ecofriendly corrosion inhibitor for protection of stainless steel‐304 in hydrochloric acid solution: Chemical, electrochemical, and surface morphology studies

Chemical, electrochemical, thermodynamic and adsorption study of EN8 dual-phase steel with ferrite-martensite structure in 0.5 M H2SO4 using pectin as inhibitor

Corrosion inhibition of ferrite bainite AISI1040 steel in H₂SO₄ using biopolymer

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Maltodextrin for corrosion mitigation of zinc in sulfamic acid: Electrochemical, surface and spectroscopic studies

Cited by 23 publications

References 58 publications

Evaluation of Curam drug as an ecofriendly corrosion inhibitor for protection of stainless steel‐304 in hydrochloric acid solution: Chemical, electrochemical, and surface morphology studies

Evaluation of Curam drug as an ecofriendly corrosion inhibitor for protection of stainless steel‐304 in hydrochloric acid solution: Chemical, electrochemical, and surface morphology studies

Chemical, electrochemical, thermodynamic and adsorption study of EN8 dual-phase steel with ferrite-martensite structure in 0.5 M H2SO4 using pectin as inhibitor

Corrosion inhibition of ferrite bainite AISI1040 steel in H2SO4 using biopolymer

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Corrosion inhibition of ferrite bainite AISI1040 steel in H₂SO₄ using biopolymer