EIS evaluation of protective performance and surface characterization of epoxy coating with aluminum nanoparticles after wet and dry corrosion test

Madhankumar, A.; Srinivasan, Naveen; Rajendran, N.; Nishimura, Toshiyasu

doi:10.1007/s10008-011-1623-1

Cited by 53 publications

(23 citation statements)

References 33 publications

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“…S5, † which can be used to describe the electrochemical behavior of bare and coated SS substrates. 22 Typically, n is close to 1, representing the capacitive characteristic of the interfaces. An equivalent circuit consisting of a resistor connected in series to a parallel connected resistor and capacitor for bare SS is shown in Fig.…”

Section: Electrochemical Corrosion Analysismentioning

confidence: 99%

Fabrication of nitrogen doped graphene oxide coatings: experimental and theoretical approach for surface protection

et al. 2015

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In this work, we present a simple strategy of fabricating an N-doped graphene oxide (N-GO) coating on stainless steel (SS) for protective applications. Electrochemical, surface analytical and quantum chemical techniques were employed to characterize the synthesized coatings on the SS surface. Graphene oxide (GO) and reduced graphene oxide (rGO) coatings on SS were adopted for comparison. The downshift of the G band in the Raman spectra of N-GO corroborated the incorporation of N atoms and the deconvoluted spectra of N1s revealed that N-GO coatings retain three types of nitrogen. The influence of N doping on the surface roughness and hydrophobicity of GO was investigated using surface topographic and contact angle measurements. An electrochemical corrosion study on the coatings indicated that N doping of GO enhances the corrosion resistance of SS in 3.5% NaCl solution more than GO and rGO. In order to describe the underlying mechanism, the adsorption energies of GO coatings with SS were computed using molecular dynamics simulation (MDS). The MDS results revealed that all the coating systems adsorbed in a parallel orientation on the Fe surface. N-GO coating exhibited the strongest and the most stable chemisorbed interaction on SS when compared to GO and rGO.

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Section: Electrochemical Corrosion Analysismentioning

confidence: 99%

Fabrication of nitrogen doped graphene oxide coatings: experimental and theoretical approach for surface protection

et al. 2015

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“…In general, a good metal coating system is expected to show high values of R c and R ct and low values of Q c , and Q dl . The impedance value in the low frequency region is another important parameter to evaluate the performance of the coating.…”

Section: Resultsmentioning

confidence: 99%

Poly(m‐phenylenediamine)‐coated 316L SS: A promising material for bipolar plates in PEMFC environment

Shanmugham

Rajendran

2019

Materials & Corrosion

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The applicability of conducting polymer coatings to enhance corrosion resistance of bipolar plates in proton exchange membrane fuel cells (PEMFC) is gaining greater significance as electrical conductivity is as important as corrosion resistance. Metaphenylenediamine (mPD) monomer was electropolymerized to poly(m‐phenylenediamine) (PmPD) conducting polymer over 316L SS and characterized by attenuated total reflectance infrared spectroscopy to confirm the formation of P mPD polymer. Scanning electron microscopy was used to study the surface morphology of the polymer. Open‐circuit potential, electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization studies were conducted to assess the corrosion protection performance of the PmPD polymer coating in PEMFC environment. The charge‐transfer resistance measured from EIS for the coated substrates was higher than the uncoated substrate. Potentiodynamic polarization studies showed lower corrosion current density for the PmPD‐coated substrates. All the results proved that the PmPD‐coated substrates could exhibit enhanced corrosion resistance in PEMFC environment.

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“…Epoxy based protective coatings have been applied to the steels against corrosion for many years which acts as a physical barrier layer against corrosion and cost effective [11]- [13]. The majority of coated steels and their corrosion performance were conducted in NaCl solutions.…”

Section: Introductionmentioning

confidence: 99%

<i>In-Situ</i> Corrosion Monitoring of Scratched Epoxy Coated Carbon Steel in Saturated Ca(OH)<sub>2</sub> with or without 3% NaCl by Scanning Electrochemical Microscopy and Electrochemical Impedance Spectroscopy

Balusamy¹,

Nishimura²

2016

AJAC

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The present work is investigated the in-situ monitoring of local corrosion process of scratched epoxy coated carbon steel in saturated Ca(OH)2 with and without 3% NaCl using SECM and correlated with EIS. The results obtained from EIS analysis showed that the corrosion resistance of scratched epoxy coated carbon steel decreases in Cl − containing solution as the increase in wet/ dry corrosion cycles. This was indicated by decrease in film resistance (Rf) and charge transfer resistance (Rct), while the coated steel maintain the resistance values in saturated Ca(OH)2, most of which recovered after drying. The corrosion process was monitored using SECM by setting the tip potential at −0.70 V vs Ag/AgCl, where the consumption of dissolved oxygen occurred at the surface of test sample. The consumption of dissolved oxygen current (I'oxy-c) values was increased during the immersion in a solution with 3% NaCl. However, in wet/dry corrosion cycles, I'oxy-c was decreased due to the coverage of hydroxides/oxides at scratch area which suppressed the consumption of dissolved O2. It was found that the continuous decrease in corrosion was mainly attributed to continuous formation of corrosion products at anodic spots.

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EIS evaluation of protective performance and surface characterization of epoxy coating with aluminum nanoparticles after wet and dry corrosion test

Cited by 53 publications

References 33 publications

Fabrication of nitrogen doped graphene oxide coatings: experimental and theoretical approach for surface protection

Fabrication of nitrogen doped graphene oxide coatings: experimental and theoretical approach for surface protection

Poly(m‐phenylenediamine)‐coated 316L SS: A promising material for bipolar plates in PEMFC environment

<i>In-Situ</i> Corrosion Monitoring of Scratched Epoxy Coated Carbon Steel in Saturated Ca(OH)<sub>2</sub> with or without 3% NaCl by Scanning Electrochemical Microscopy and Electrochemical Impedance Spectroscopy

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EIS evaluation of protective performance and surface characterization of epoxy coating with aluminum nanoparticles after wet and dry corrosion test

Cited by 53 publications

References 33 publications

Fabrication of nitrogen doped graphene oxide coatings: experimental and theoretical approach for surface protection

Fabrication of nitrogen doped graphene oxide coatings: experimental and theoretical approach for surface protection

Poly(m‐phenylenediamine)‐coated 316L SS: A promising material for bipolar plates in PEMFC environment

&lt;i&gt;In-Situ&lt;/i&gt; Corrosion Monitoring of Scratched Epoxy Coated Carbon Steel in Saturated Ca(OH)&lt;sub&gt;2&lt;/sub&gt; with or without 3% NaCl by Scanning Electrochemical Microscopy and Electrochemical Impedance Spectroscopy

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<i>In-Situ</i> Corrosion Monitoring of Scratched Epoxy Coated Carbon Steel in Saturated Ca(OH)<sub>2</sub> with or without 3% NaCl by Scanning Electrochemical Microscopy and Electrochemical Impedance Spectroscopy