Electrode Corrosion in Sodium Chloride (NaCl) Electrolytes During PEF-Treatment
Abstract (englisch):
The examination of electrodes of treatment chambers, used for pulsed electric field (PEF)
processing of aqueous liquids, showed macroscopic surface damages after only a few hours of treatment. The electrodes consist of acid-resistant, austenitic Cr-Ni steel (AISI 316Ti / 1.4571).
For all investigations rectangular monopolar 40kV/cm pulses with a pulse duration of 1 µs were applied, administering a specific energy 150 kJ/L to the processed electrolyte. Corrosion was observed after PEF processing of aqueous sodium chloride (NaCl) electrolytes at a concentration of ~ 0.77 g NaCl/L H2 O. The electrodes were processed in treatment periods of 2 h – 10 h, corresponding to 2.16x104 - 1.08x105 pulses. The obtained electrode mass losses were in the range of ~ 1.0 mg/h (anode) and ~ 0.19 mg/h (cathode). Besides sodium and chlorine, only nickel ions could be detected in the processed electrolytes in significant concentrations of up to 0.28 mgNi/L electrolyte. The remaining corrosion products are present as solid particles. Additionally, results from metallographic investigations of the electrode surface and composition of the erosion
products are discussed.
processing of aqueous liquids, showed macroscopic surface damages after only a few hours of treatment. The electrodes consist of acid-resistant, austenitic Cr-Ni steel (AISI 316Ti / 1.4571).
For all investigations rectangular monopolar 40kV/cm pulses with a pulse duration of 1 µs were applied, administering a specific energy 150 kJ/L to the processed electrolyte. Corrosion was observed after PEF processing of aqueous sodium chloride (NaCl) electrolytes at a concentration of ~ 0.77 g NaCl/L H2 O. The electrodes were processed in treatment periods of 2 h – 10 h, corresponding to 2.16x104 - 1.08x105 pulses. The obtained electrode mass losses were in the range of ~ 1.0 mg/h (anode) and ~ 0.19 mg/h (cathode). Besides sodium and chlorine, only nickel ions could be detected in the processed electrolytes in significant concentrations of up to 0.28 mgNi/L electrolyte. The remaining corrosion products are present as solid particles. Additionally, results from metallographic investigations of the electrode surface and composition of the erosion
products are discussed.
| Zugehörige Institution(en) am KIT | Institut für Hochleistungsimpuls- und Mikrowellentechnik (IHM) |
| Publikationstyp | Proceedingsbeitrag |
| Publikationsjahr | 2025 |
| Sprache | Englisch |
| Identifikator | ISBN: 979-8-3315-4376-1 KITopen-ID: 1000188050 |
| HGF-Programm | 38.05.01 (POF IV, LK 01) Anthropogenic Carbon Cycle |
| Erschienen in | IEEE Pulsed Power and Plasma Science (PPPS 2025) |
| Veranstaltung | IEEE Pulsed Power and Plasma Science Conference (PPPS 2025), Berlin, Deutschland, 15.06.2025 – 20.06.2025 |
| Verlag | Institute of Electrical and Electronics Engineers (IEEE) |
| Schlagwörter | Electrodes, Chlorine compounds, Corrosion, Sodium, Electrolytes, Solids, Nickel, Plasmas, Steel, Surface treatment |
| Nachgewiesen in | OpenAlex |