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The Flexcell, used to determine the
Critical Pitting Temperature, is designed to counteract a problem that plagues most
other flat sample designs -- crevice corrosion around the specimen seal. First popularized
by Avesta Steel, the cell utilizes a flooded gasket seal design to inhibit crevice
corrosion between the sample and its holder. This simple yet elegant design results
in an easy to use, reliable, crevice free system.
The main body of the cell is a two piece construction that allows for easy handling and
assembly. Specimens are mounted facing upwards, allowing for close but unobtrusive
placement of a temperature probe and reference electrode. The Flexcell
is heated
externally with a wrap-around heater. An internal Teflon-coated copper coil allows for
chilling the temperature of the the cell using externally cooled water.
A motor-driven stirrer is also available for the Flexcell. Flexcell
components were selected to be as chemically inert as possible. In normal use, the
only materials in contact with the test solution are glass, filter paper, and TFE Teflon. The
Flexcell is
therefore
usable with a wide variety of test solutions, including nonaqueous media.
When used in conjunction with the CPT110 Critical Pitting
Temperature software and a TDC4
Temperature Controller
or any other lab grade precision temperature controller, the system becomes a very useful
and powerful tool for studying localized corrosion. In the tradition of Gamry, the
Flexcell
can be used out of the box or adapted to meet your needs.
Click here to view a cross section of the Flooded Gasket Seal.
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Metal
Specimen
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Active Area
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0.775 square inches ( nominal )
5.0 cm2 ( nominal
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Minimum Size
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4.0 cm x 4.0 cm
4.0 cm diameter ( circular
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Maximum Size
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7.5 cm x any
length or
11.0 cm x 11.0 cm ( rectangular )
11.0 cm diameter ( circular )
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Vessel
Dimensions
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Volume
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1000 ml ( minimum )
1300 ml ( maximum )
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Inner Diameter
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10 cm ( nominal
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Temperature
Range
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Operating
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-25șC to 140șC |
Storage |
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-40șC to 180șC ( not assembled )
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Chemical
Compatibilty
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Wetted
Materials
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Pyrex, Teflon, Filter
Paper
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Non-Wetted Materials
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Above, plus stainless steel,
Viton, silicone rubber
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