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Hydrogen Permeation Cell

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This hydrogen permeation cell, also known as a Devanathan-Stachurski cell, is used to study corrosion via permeation of hydrogen through a thin disk of metal (typically steel).  A complete setup includes two cells, several electrodes/accessories (see pricing table below), as well as two fully-floating potentiostats (all sold separately).  This setup is designed to meet standards from procedure ASTM G148.

A full hydrogen permeation experiment requires at least two Devanathan-Stachurski cells, several electrodes/accessories (see pricing table below for details), as well as two potentiostatsContact Pine Research for more details regarding implementation and operation of a hydrogen permeation experiment.

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# Description Price in USD
Devanathan-Stachurski Cell
RRPG361

Devanathan-Stachurski Hydrogen Permeation Half Cell
glass cell, holds 250 mL, contains four 14/20 ports and #25 spherical joint, complete experiment requires two half cells

Complete Setup Includes the Following
AFD508G14S1

Disk, 1018 Steel, 2" OD x .056" Thick

KAA217V

O-Ring, Viton, #217
two O-rings required

KACP40

Pinch Clamp, Size 40

RRPG086

Dual Port Gas Inlet
two required; purge/sparge accessory mounts in any 14/20 side port

AFCTR5

Standard Platinum Counter Electrode Kit
two required; includes isolation tube and adapter to fit 14/20 port

6.9 mm OD epoxy tube shroud, 150 mm long

RREF0021

Single Junction Silver Chloride (Ag/AgCl) Reference Electrode
two required; includes 14/20 PTFE adapter, storage bottle, bottle of filling solution

RRPG359

Standard Cell Luggin Tube
optional, two needed if used; requires adapter to fit into 14/20 port, 12 mm OD tube, 1 mm ID tip opening, accepts standard size reference electrodes

ACEP1420R12

PTFE Mount for Fritted Tube
optional, two needed if used; slides around Luggin tube, fits into a 14/20 port

RRPG085K2

PTFE Stopper for 14/20 glassware port
optional, up to 8 needed

Hydrogen permeation experiments often follow the ASTM G148 standard.  This Devanathan-Stachurski cell from Pine Research is designed to meet the specifications in ASTM G148.  Each borosilicate glass cell holds around 250 mL of electrolyte, has four 14/20 taper ports, and has a #25 spherical joint.  A thin metal disk is sandwiched between the spherical joints of two cells, and sealed with O-rings on either side pressed together with a pinch clamp.  Pine Research offers 1018 steel disks that are 2″ (5.08 cm) OD, 0.056″ (0.14 cm) thick; other materials may be available upon request.

The exposed surface area on either side of the disk is approximately 6.95 cm2.  Per ASTM G148, the required electrolyte volume per cell should be > 20 mL/cm2, and the recommended ratio of metal disk radius to thickness should be 10:1 or greater.  Therefore, using the standard 1018 steel disks manufactured by Pine Research with these cells, the ASTM G148 specifications can be satisfied.  A minimum volume of 139 mL is required for a surface area of 6.95 cm2 (the cells each hold 250 mL), and the radius to thickness ratio (radius = 1.49 cm; thickness = 0.14 cm) is 10.5:1.

Operating a hydrogen permeation experiment requires two potentiostats.  The typical experimental procedure requires a metal disk acting like the membrane in between the two Devanathan-Stachurski cells, and each half cell also contains a counter electrode and reference electrode (as well as optional Luggin tubes for each reference).  Each potentiostat must be fully floating (that is, completely electrically isolated, especially with respect to Earth Ground), and both potentiostats’ Working Drive and Working Sense leads are connected to the metal disk.  Each instrument connects to its own counter and reference electrode.  One potentiostat generates H2 gas at its counter electrode, which diffuses throughout the electrolyte and permeates through the metal disk.  Any H2 that passes through the disk to the other half cell can be detected via oxidation on the opposing counter electrode.

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