Gamry FlexCell – Measurement cell set for determining the critical pitting temperature with TDC5 controller

Product Description

The difference is the active electrode surface, which is not delimited by an O-ring or other seals that cause crevice corrosion. Instead, deionised water is slowly pressed through a porous washer made of inert fibre material and then diffuses into the electrolyte. The medium in the washer therefore consists almost exclusively of deionised water, which is not conductive enough for corrosion processes to progress. In this way, the active electrode surface is not limited by the O-ring, but by a conductivity gradient.

Flat working electrodes are commercially available from Metal Samples Co. Inc. of Munford, Alabama. The product series P/N CO0130 [5 cm(L) x 5 cm(W) x 0.31 cm(H)] is particularly suitable for use in this measuring cell set due to the prescribed side length of the sample bodies of at least 4 cm. If you prepare your own specimens, you should consider the evenness and surface roughness for the outer sealing with an O-ring. For material thicknesses greater than 3.2 mm, the sample bodies can be attached directly to the Teflon plate (insulating tile) with the toggle/thumb screw and electrically contacted without a sample holder. For thinner material thicknesses, the sample support serves as protection against deformation during attachment. However, working electrodes with a low material thickness have the advantage that they can be bent by 90° at one corner to make contact with the potentiostat. The minimum material thickness is 0.8 mm.

The sample body opens into a cylindrical Teflon cover (bottom cap) with four side connections (#7 Ace thread / ¼”-28 connection piece) and the option of introducing deionised water via the ¼”-28 connection piece. Three further #7 Ace Thread holes are used to connect a Luggin capillary for the reference electrode, a temperature sensor (RTD temperature sensor in conjunction with the TDC5 controller) and an optional drain via the corresponding threaded sleeves under O-ring seal. The glass structure (glass dome) is made of Pyrex® and has seven connections. Four glass sleeves with an internal thread from ACE Glass INC. Vineland / NJ (#7 Ace – Thread) and three 24/40 ground glass sleeves. Two #7 Ace – Thread connections accommodate the inlet and outlet of a cooling coil made of glass (glass cooling coil) or Teflon-coated copper via the threaded sleeves with O-ring seal.

In identical fashion, the two additional #7 Ace threads mount either two graphite counter electrodes for more even current distribution or, when using a single counter electrode, an optional liquid thermometer with useful additional information about the temperature profile in the bulk. The available 24/40 ground joint sleeves are used in the centre to accommodate a guide for a stirring rod (Stirring Rod Kit) with optional motor (IKA Eurostar 20 stirrer motor), a lateral inert gas supply (Glass Bubbler / Vent) and a further opening for the addition of reagents that can be closed with a stopper and clamping ring lock.

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Specifications

SYSTEM



Material: Pyrex®, PTFE, filter paper, polypropylene, Tygon, Viton, silicone rubber

Volume: 1000 ml – 1300 ml



CONFIGURATION



Working electrode connections:



Working electrode surface area: 5 cm²

Working electrode dimensions (minimum / maximum): 4 cm x 4 cm (rectangular); Ø 4 cm (round) / 11 cm x 11 cm (rectangular); Ø 11 cm (round)

Deionised water inlet connection: ¼”–28 fitting

Reference electrode connection: #7 Ace thread (capillary tube)

RTD temperature sensor connection: #7 Ace – Thread (Viton spacer with special O-ring)

Optional drain: #7 Ace – Thread


Glass

assembly connections:


Counter-electrode connection: #7 Ace – Thread (graphite rod 300 mm / Ø 6.3 mm)

Liquid thermometer connection: #7 Ace – Thread

Cooling coil inlet/outlet connection: #7 Ace – Thread

Inert gas purging, stirrer and reagent addition connections: 3 x standard ground joint 24/40

Options and Accessories

• Interface 1000 Potentiostat/Galvanostat/ZRA

• Interface 1010 Potentiostat/Galvanostat/ZRA

• Reference 600 Potentiostat/Galvanostat/ZRA

• Reference 600+ Potentiostat/Galvanostat/ZRA

• Reference 3000 (AE) Potentiostat/Galvanostat/ZRA

• TDC5 Temperature Control Unit (incl. driver, requires CPT110)

• Flexcell Heating Mantle Kit, 240 V, 300 W, CE

• Flexcell Stirring Rod Kit

• Flexcell Filter Paper Gaskets, 50/pack

• Flexcell Filter Paper Gaskets, 100 per pack

• Flexcell filter paper gaskets, 500 per pack

• Flexcell Filter Paper Gaskets, 1000 per pack

• O-ring, Large, Teflon-encapsulated silicone, #348

• O-ring, small, Teflon-encapsulated silicone, #126

• #7 Ace Thread Bushing, Teflon

• Barbed tube fitting, 1/4-28×1/8″ ID, polypropylene

• Ball joint clamp, pink

• Standard joint clamp, green

• O-ring, FETFE (935-34)

• Reference Well Band Strap

• Flexcell CPT Spacer, Viton, 1/8″ ID, 1/4″ OD, 1″

• Teflon tape

• Teflon sleeve for Spherical #12 joint

• Flexcell CPT sample support

• Thumb/Toggle screw 1/2-20 x 2″, 3/16

• 1/4″-20 rod, 5″ long, SS, 4/pkg

• Flexcell CPT, rubber foot, 4 per pack

• Flexcell CPT flushing solution reservoir

• Calomel (SCE) reference electrode

• Silver/silver chloride reference electrode

• Mercury sulphate reference electrode (without chloride anions)

• Mercury oxide reference electrode for alkaline media

• Silver/silver nitrate reference electrode for non-aqueous electrolytes

• SCE refill solution (120 ml)

• Ag/AgCl refill medium (120 ml)

• Vycor frit with Teflon heat-shrink tubing, 3.5 mm (5 pieces)

• KT glass frit with Teflon heat-shrink tubing, 3.5 mm (5 pieces)

• Polymer exchange frits for mercury oxide reference electrode

Applications