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It's Fall. Summer is over and our days are getting
shorter. We've been busy, however, and some of our
efforts are chronicled in this issue of our
newsletter. We hope you'll find the stories
interesting.
| A Tech Support Nightmare. |
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Some Potentiostat installations can be
particularly vexing. Here's one story.
A customer called our technical support and
explained that he had tried to perform a long term
(many day) potentiostatic experiment. The
experiment would run for many hours. Too often,
however, he would arrive the next morning to find
that his computer had rebooted and was waiting at
the Login screen. We were suspicious of a software
problem. However, many customers had run long
term experiments using the same software without
problems.
We suspected that the computer did not have
enough memory. He increased the memory to 512
Mbytes, but the problem persisted. We postulated
that there was some strange interaction with
another subsystem installed in his computer. He sent
the entire system, computer and all, to us.
It ran for a week at our office without problems! We
briefly considered that his laboratory might be
haunted!
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| EIS for Coatings. |
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Pete Peterson, Dave Loveday, and Bob Rodgers of
Gamry (a.k.a. "The Three Wise Guys") have
collaborated to produce a three article series on
"Evaluation of Organic Coatings with Electrochemical
Impedance Spectroscopy." The series will appear soon
in the Analytical Series section of JCT CoatingsTech.
CoatingsTech is a publication of FSCT. More info
is available at
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| Just a little bit better! Version 4.31. |
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New revisions of the Gamry FrameworkTM
and Echem AnalystTM Software have been
released. A collection of small bugs have been
fixed, but users of Gamry's EIS300 Electrochemical
Impedance Spectroscopy Software will notice some
improvements.
Additional choices have been added to the "Curve
Selector" for EIS data files. Admittance and
Capacitance can now be plotted easily. When Area
Normalized impedances are fit to a model, the Area
Normalized circuit parameters are displayed. Battery
and Fuel Cell researchers will appreciate finer
control over small applied AC voltages (requires
PCI4 Serial Number 35000 or higher.)
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| Stop by and say "Hello!" |
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The Gamry team will be busy in the next few months!
See us at the Fall ISE meeting in Greece, the Fall
ECS meeting in Hawaii, or the Fuel Cell Seminar in
San Antonio!
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THE Method ! |
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Localized corrosion, including crevice corrosion, is a
leading cause of corrosion induced failures.
THE
(Tsujikawa-
Hisamatsu-
Electrochemical) Method has been
proposed to measure crevice corrosion repassivation
potentials.
This protocol for studying the repassivation potential
of a corroding crevice was first suggested by
Tsujikawa and Hisamatsu in 1980. Recent interest in
very long service-life alloys has rekindled interest.
We became involved when a Gamry user asked us to
prepare a special script to automate the testing.
Because of Gamry's Open Source Scripting approach
to software development, the experiments were fairly
easily done in the Gamry FrameworkTM
ExplainTM scripting language. Gamry's
Echem AnalystTM scripts, written in
Microsoft's Visual Basic for Applications, were also
easily modified.
Read more about THE Method....
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