Theoretical Analysis of the Current Density Distribution in Electrolytic Cells

Wagner, Carl

doi:10.1149/1.2778113

Cited by 254 publications

(95 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…While results in animals generally show that threshold charge decreases with electrode diameter, the threshold charge density increases. This suggests a complex relationship between thresholds and electrode size, possibly due to an inhomogeneous current distribution at the surface of the electrode that evolves during the time course of the stimulus pulse [53], [54]. The trend for thresholds required for eliciting phosphenes in human subjects is less clear.…”

Section: Discussionmentioning

confidence: 99%

AnIn VitroModel of a Retinal Prosthesis

Ahuja

Behrend

Kuroda

et al. 2008

IEEE Trans. Biomed. Eng.

102

View full text Add to dashboard Cite

Epiretinal prostheses are being developed to bypass a degenerated photoreceptor layer and excite surviving ganglion and inner retinal cells. We used custom microfabricated multielectrode arrays with 200-μm-diameter stimulating electrodes and 10-μm-diameter recording electrodes to stimulate and record neural responses in isolated tiger salamander retina. Pharmacological agents were used to isolate direct excitation of ganglion cells from excitation of other inner retinal cells. Strength-duration data suggest that, if amplitude will be used for the coding of brightness or gray level in retinal prostheses, shorter pulses (200 μs) will allow for a smaller region in the area of the electrode to be excited over a larger dynamic range compared with longer pulses (1 ms). Both electrophysiological results and electrostatic finite-element modeling show that electrodeelectrode interactions can lead to increased thresholds for sites half way between simultaneously stimulated electrodes (29.4 ± 6.6 nC) compared with monopolar stimulation (13.3 ± 1.7 nC, p < 0.02). Presynaptic stimulation of the same gan-glion cell with both 200-and 10-μm-diameter electrodes yielded threshold charge densities of 12 ± 6 and 7.66 1.30 nC/cm 2 , respectively, while the required charge was 12.5 ± 6.2 and 19 ± 3.3 nC.

show abstract

Section: Discussionmentioning

confidence: 99%

AnIn VitroModel of a Retinal Prosthesis

Ahuja

Behrend

Kuroda

et al. 2008

IEEE Trans. Biomed. Eng.

102

View full text Add to dashboard Cite

show abstract

“…Finite element analysis (FEA) of potential and current distributions in galvanic systems has long been studied in the literature [21][22][23][24][25][26][27]. Such studies are often carried out to investigate fundamental effects of electrolyte geometry [26,28,29], electrode kinetics [25], and unique part geometries [21].…”

Section: International Journal Of Corrosionmentioning

confidence: 99%

Numerical Simulation of Galvanic Corrosion between Carbon Steel and Low Alloy Steel in a Bolted Joint

Radouani

Ech-charqy

Essahli

2017

International Journal of Corrosion

View full text Add to dashboard Cite

The galvanic corrosion of a bolt joint combining carbon steel end plate and low alloy steel bolt was investigated electrochemically in a 1 M HCl solution. The corrosion parameters of the joint components were used for numerical simulation using Comsol Multiphysics software to analyze the galvanic corrosion behavior at the contact zone between the head bolt and the end plate. In this research work we evaluate the variation of the corrosion rate in the steel end plate considered as the anode, in order to determine the lifetime of the bolted assembly used in steel structures. Three materials (20MnCr5, 42CrMo4, and 32CrMoV13) and three bolts (M12, M16, and M20) were tested in two thicknesses of electrolyte 1 M HCl ( = 1 mm, = 20 mm). It is found that the corrosion rate of the anode part (end plate) is higher for 32CrMoV13 materials and it increases if both diameter of the bolt and thickness of the electrolyte increase (Cr(M20) > Cr(M16) > Cr(M12) and Cr( = 20 mm) > Cr( = 1 mm)). This corrosion rate is higher in the contact area between the bolt head and the end plate, and it decreases if we move away from this contact area.

show abstract

“…In Fig. 8, the effect of Wa on the relation a= r/r o (13) between the electrode efficiency and the average To describe the current distribution the Wagner reduced current density is shown. number is used [13].…”

Section: Theorymentioning

confidence: 99%

“…8, the effect of Wa on the relation a= r/r o (13) between the electrode efficiency and the average To describe the current distribution the Wagner reduced current density is shown. number is used [13]. This represents the ratio of the If for a specific electrode and a specific electrochempolarization resistance and the electrode resistance ical reaction the radius r0, the thickness te, the specific and is defined as resistance De and the exchange current density i 0 are Wa=(ioR[]r~f) 1 (14) known, Fig.…”

Section: Theorymentioning

confidence: 99%

Potential and current distribution on the surface of a hydrogen gas diffusion anode

et al. 1995

View full text Add to dashboard Cite

The current and potential distribution for a hydrogen gas-diffusion disc electrode with a relatively high ohmic resistance are investigated. A theoretical model for these distributions is presented. Potential differences between the edge of the electrode and points on the electrode surface have been measured for a hydrogen gas-diffusion electrode loaded with various total currents. From the results it is concluded that the proposed model is very useful to obtain the potential and the current density distribution along a hydrogen-gas diffusion disc electrode. Moreover, the allowable size of cylindrical holes in a perforated plate placed against the rear of the gas diffusion electrode for its current supply, can be calculated to achieve a reasonably uniform current distribution along the gas-diffusion electrode. List of symbols

show abstract

Theoretical Analysis of the Current Density Distribution in Electrolytic Cells

Cited by 254 publications

References 0 publications

AnIn VitroModel of a Retinal Prosthesis

AnIn VitroModel of a Retinal Prosthesis

Numerical Simulation of Galvanic Corrosion between Carbon Steel and Low Alloy Steel in a Bolted Joint

Potential and current distribution on the surface of a hydrogen gas diffusion anode

Contact Info

Product

Resources

About