Civil Engineering Reference
In-Depth Information
TABLE 21-6. Electrochemical Corrosion Data Analysis Software
Software Package
Application
Comments
References
Corfit
Capable of determining Tafel values and
corrosion current densities from data ob-
tained in the non-Tafel region of typical
polarization curves
It is the original and remains the most fre-
quently used routine for polarization data in-
terpretation. Observed data is fitted to the
electrokinetic model using a least squares
method. The usefulness of the approach is
restricted by the limited number of data
points the fitting routine can handle. Program
written in FORTRAN.
40
Polcorr
Similar application range as CORFIT
Uses an improved linearized least square
method of data fitting. Capable of handling
up to 51 data points. Designed to run on
VAX systems.
41
Polfit
Capable of estimating anodic and cathodic
Tafel slopes, corrosion current density,
and polarization resistance, and of estab-
lishing the confidence limits for each of
these parameters
Can provide point-by-point ohmic drop com-
pensation (IR correction) for all observed
data points. Provides full graphic representa-
tion functions. Capable of simulation model-
ing of hypothetical polarization parameters.
Written in FORTRAN 4.1.
42, 43
Baukamp EIS software
Designed to aid the interpretation of electro-
chemical impedance spectra. Capable of
developing electrical model of corroding
surface consisting of distinct electrical
building blocks.
Utilizes systems approach. Limited to EIS ap-
plications.
44
Gamry software package
Capable of all standard DC polarization data
interpretation; full graphics representa-
tion; real-time data collection and inter-
pretation features
Software provides instrument control, data log-
ging, and analytical functions for Gamry po-
larization instruments. Capable of handling
over 2,000 data points simultaneously. Oper-
ates in Windows environment.
45
(Reprinted from
Internal Corrosion of Water Distribution Systems,
2d ed., by permission. Copyright
1996, American Water Works Association.)
