A review of impedance plot methods used for corrosion performance analysis of painted metals

Walter, G.

doi:10.1016/0010-938x(86)90033-8

Cited by 637 publications

(248 citation statements)

References 59 publications

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“…However, it is not possible to observe these two time constants for the Ti6Al4V alloy (Figure 3). This could denote a very close relaxation time (100 Hz e 10 Hz) for the two processes 35 .…”

Section: Resultsmentioning

confidence: 80%

Electrochemical Stability and Bioactivity Evaluation of Ti6Al4V Surface Coated with Thin Oxide by EIS for Biomedical Applications

2015

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Section: Resultsmentioning

confidence: 80%

Electrochemical Stability and Bioactivity Evaluation of Ti6Al4V Surface Coated with Thin Oxide by EIS for Biomedical Applications

2015

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“…The equivalent circuit (EC) proposed for fitting the EIS diagram after 1, 3, and 7 days of immersion in the presence of tannin is R s (Q 1 [R 1 (Q 2 R 2 )]) where R s represents the ohmic resistance between the reference and working electrodes, R 1 and R 2 represent the resistance or charge transfer in physical meaning [27]. The Q 1 and Q 2 parameters are the impedance related to a constant phase element (CPE) and can be attributed electrode surface or adsorbed species [27]. The CPE impedance takes into account the phenomena due to the surface heterogeneities.…”

Section: Potentiodynamic Polarizationmentioning

confidence: 99%

“…The CPE impedance takes into account the phenomena due to the surface heterogeneities. The CPE impedance is given by (2) [27]:…”

Section: Potentiodynamic Polarizationmentioning

confidence: 99%

“…The R s represents the ohmic resistance between the reference and working electrodes, R 1 and R 2 represent the resist- ance or charge transfer in physical meaning [27]. The Q 1 and Q 2 parameters are the impedance related to a constant phase element (CPE) and can be attributed to electrode surface or adsorbed species.…”

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

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Black Wattle Tannin As Steel Corrosion Inhibitor

2012

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In order to reduce the environmental impacts caused by chemical substances harmful to the environment and human health, the black wattle tannin can be used as an environmentally friendly corrosion inhibitor in acid and near neutral media. This paper provides information on the application of black wattle tannin as an inhibitor against the corrosion of carbon steel. The inhibition was evaluated using potentiodynamic polarization (PP) and electrochemical impedance spectroscopy (EIS) at room temperature in aerated 0.1 mol L −1 Na 2 SO 4 (pH 6.0 and 2.5). The black wattle tannin when used as a corrosion inhibitor is more effective at acidic pH, its efficiency being dependent on its concentration. At the higher pH value (pH 6.0), a blue-black film (ferric tannate) with a short-term protection against corrosion was formed in aerated aqueous solution. At pH 2.5, this blue-black film was not observed.

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“…R oxid and C oxid are the parameters obtained by fitting the impedance results to the parameters of the second time constant of the circuit (medium frequencies in the case of all three time constants) and referring to the oxide layer properties. Finally, the parameters C dl and R p are related to the disbonding of the coating and the onset of corrosion at the interface [17][18][19][20]. When modelling the equivalent circuit with CPE, the software gives values of capacitance in sn/ X units together with a parameter known as ''n''.…”

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

The design and characterisation of sol–gel coatings for the controlled-release of active molecules

Hernández-Escolano

Juan-Díaz

Martínez‐Ibáñez

et al. 2012

J Sol-Gel Sci Technol

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The controlled release of active agents from a matrix has become increasingly important for oral, trans-dermal or implantable therapeutic systems, due to the advantages of safety, efficacy and patient convenience. Controlled-release hybrid (organicinorganic) sol-gel coating synthesis has been performed to create a sol with an active molecule included (procaine). Synthesis proce-dures included acid-catalysed hydrolysis, sol preparation, the addition of a procaine solution to the sol, and the subsequent gelation and drying. The alkoxide precursors used were triethoxyvinylsilane and tetraethyl-orthosilicate (TEOS) in molar ratios of 1:0, 9:1, 8:2 and 7:3. After the determination of the optimal synthesis parameters, the material was physicochemically characterised by silicon-29 nuclear magnetic resonance ( 29 Si-NMR) and Fourier transform infrared spectroscopy, contact angle analysis and electrochemical impedance spectroscopy tests. Finally, the materials were assayed in vitro for their ability to degrade by hydrolysis and to release procaine in a controlled manner. The sustained release of procaine over a 3-day period was demonstrated. A close correlation between release and degradation rates suggests that film degradation is the main mechanism underlying the control of release. Electrochemical analysis reveals the formation of pores and water uptake during the degradation. The quantity of TEOS is one of the principal parameters used to determine the kinetics of degradation and procaine release.

show abstract

A review of impedance plot methods used for corrosion performance analysis of painted metals

Cited by 637 publications

References 59 publications

Electrochemical Stability and Bioactivity Evaluation of Ti6Al4V Surface Coated with Thin Oxide by EIS for Biomedical Applications

Electrochemical Stability and Bioactivity Evaluation of Ti6Al4V Surface Coated with Thin Oxide by EIS for Biomedical Applications

Black Wattle Tannin As Steel Corrosion Inhibitor

The design and characterisation of sol–gel coatings for the controlled-release of active molecules

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