電化學槽裝置單元

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  Devanathan-Stachurski 滲透槽

  DEVANATHAN-STACHURSKI PERMEATION CELL, MODEL A

  MODEL A

  TheDevanathan-Stachurski Permeation Cell is an electrochemical double-compartment, four-electrode setup. It is typically used to investigate hydrogen permeation in steels and other alloys (diffusion constants of hydrogen in materials, density of trap sites and trap energies) as well as to evaluate ion-exchange membranes (gas diffusion coefficient/crossover, gas solubility and gas permeability typically of H2, O2, CO and H2S). Moreover, this cell can be also used with Impedance Spectroscopy to measure ionic conductivity of membrane in 2- and 4-probe setup. In the former case, a current is applied between polarizing electrodes while potential is measured across separate reference electrodes. The measurement is therefore agnostic to any side reactions occurring at the polarizing electrodes. Luggin capillaries that make an ionic connection between permeated material and reference electrode, minimize the contribution from the ohmic drop in an aqueous electrolyte. Those Luggin capillaries are located closely to the studied permeable material and outside of the current path between polarizing electrodes. The cell elements are constructed with materials that are inert to the sample (PEEK and other fluorinated plastics). It well fits aqueous (FKM O-Rings and gaskets) electrolyte requirements. An organic electrolyte version is available on request. The construction is gas tight. Reference electrodes and polarizing electrodes are not included in the setup and should be added to the quotation separately.

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