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Files:
Polarisation curve Inox18 10_.EXP
Polarisation curve Inox18 10_025.CRV
Abstract
A polarisation
curve is obtained according to ASTM G3 & G5.
Sample
Specification
of the test: ASTM G3 & G5
Working Electrode: Inox 10/18 [AISI430]
Reference Electrode: XR210
Auxiliary Electrode: Platinum
Cell: CNC ASTM corrosion cell
Settings
- Experimental
Curve
examination
Until
-630 mV: ACTIVE REGION
From -630 mV to -550 mV: ONSET PASSIVATION
From -550mV to +570 mV: PASSIVATION
From +570 mV to +1010 mV: TRANSPASSIVATION
From +1010 mV to +1110 mV: SECONDARY PASSIVATION
After +1110 mV: OXYGEN EVOLUTION
*
TAFEL analysis
Calculates the corrosion rate with the Tafel
method according to the 1st Stern equation 17-09-1999, 09:53:35
Smoothing: 1
calculation zone: 100 mV
Segment: 50 mV
Atomic mass: 55.85 g
Valence: 2
Density: 7.8
E(i=0): -833.1 mV
i corrosion: 0.2099 mA/cm²
Rp: 76.97 ohm.cm²
Beta a: 74.6 mV
Beta c: -91.9 mV
Coefficient: 0.9997
Corrosion: 2.455 mm/Y
* STERN analysis
Calculate
the polarisation resistance according to the 2nd Stern equation
17-09-1999, 09:46:16
Smoothing: 1
Segment: 50 mV
E(i=0): -833.1 mV
Rp: 75.76 ohm.cm²
Coefficient: 1.000
Conclusion
It
is simple to obtained a polarisation curve according to ASTM G3
& G5. Both Tafel and Stern calculation can be automatically
performed to achieve corrosion parameter determination.
References
and notes
Note
that it is possible to display simultaneously the current and the
logarithm of the current.
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