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EIS Corrosion Package

Create polarization curves, Tafel plots, EIS and more

  • Supports all common corrosion techniques 
  • Includes cell, cables, and handbook
  • Includes EmStat4S HR potentiostat with EIS up to 200 kHz
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Description

This EIS corrosion package includes everything you need to get started with corrosion measurements.

The included instrument is the EmStat4S HR, which is a small research-grade potentiostat. The EmStat4S HR supports all common electrochemical techniques used for corrosion analysis. These techniques include Electrochemical Impedance Spectroscopy (EIS), Potentiostatic Polarization, Linear Polarization, Cyclic Polarization, Corrosion potential measurements as well as applying a constant potential and measuring the open circuit potential (EOC). It has a wide range of current ranges and supports a maximum currrent up to 200 mA for determining corrosion rates. The instrument comes with PSTrace5 software which allows for different corrosion analytical techniques for automatic or manual analysis.

Together with our Corrosion Handbook and the Corrosion Cell Kit, it makes a good combination to get going with electrochemical corrosion studies.

Electrochemical Impedance Spectroscopy (EIS)
EIS allows observing: changes on surface properties, pitting corrosion, water uptake of a coating, estimation of delamination area and estimation of time to failure

Standard included with an EIS Corrosion Package

  • Corrosion Cell
  • Corrosion Handbook
  • EmStat4S HR
  • Rugged carrying case
  • High quality, double shielded cell cable with 2 mm banana connectors for Working, Counter, Reference electrode, Sense and Ground
  • Crocodile clips
  • USB cable
  • PSTrace software for Windows

Techniques

The included EmStat4S supports:

Corrosion techniques

  • Potentiostatic Polarization
  • Galvanostatic Polarization
  • Linear Polarization
  • Cyclic Polarization
  • Corrosion Potential
  • Electrochemical Impedance Spectroscopy (EIS)
  • Zero Resistance Ammeter (ZRA)

Technique as a function of time

  • Corrosion Potential Measurement
  • Chronoamperometry (CA)
  • Pulsed Amperometric Detection (PAD)
  • Multiple Pulse Amperometry (MPAD)*
  • Fast amperometry (FAM)*
  • Chronopotentiometry (CP)
  • Multistep Amperometry (MA)
  • Multistep Potentiometry (MP)
  • Mixed Mode (MM)*
Missing a technique? Find it in our cross-reference list

 

Voltammetric techniques:

  • Linear Polarization
  • Cyclic Polarization
  • Differential Pulse Voltammetry (DPV)
  • Square Wave Voltammetry (SWV)
  • Normal Pulse Voltammetry (NPV)
  • AC Voltammetry (ACV)*
  • Stripping chronopotentiometry (PSA or SCP)

Impedance spectroscopy (EIS/GEIS*):

  • Potential scan
  • Time scan
  • Fixed potential

Scans can be made at a fixed frequency or with a frequency scan.

Stripping modes
The voltametric and pulsed techniques can all be used in their stripping modes which are applied for (ultra-) trace analysis.
Software update
Techniques marked with an asterisk* will become available with the next software update in October 2021.

Specifications

Specifications of the included potentiostat 
 
 
Potential range ±6 V
Max. compliance voltage ±8 V
Current ranges 100 nA to 100 mA (7 ranges)
Max. current ±200 mA
Electrode connections WE, RE, CE, S, and ground,
2 mm banana plugs
General  
dc-potential range ±6 V
compliance voltage ±8 V
maximum current ±200 mA
max. data acquisition rate 1 000 000 samples /s
Potentiostat   
applied potential resolution 183 µV
applied potential accuracy

≤ 0.2% ±1 mV offset

current ranges

100 nA to 100 mA

7 ranges

measured current resolution 0.009% of CR (92 fA on 1 nA range)
measured current accuracy ≤ 0.2% at Full Scale Range
Galvanostat  
current ranges

1 uA, 100 uA, 10 mA, 100 mA

4 ranges

applied dc-current

±3 * CR (current range)

applied dc-current resolution

0.0183% of CR

applied dc-current accuracy <0.4% (gain) + 0.002 * CR (offset)
measured dc-potential resolution

193 µV (gain 1)

96.5 µV (gain 2)

38.5 µV (gain 5)

19.3 µV (gain 10)

9.65 µV (gain 20)

measured dc-potential accuracy ≤ 0.2% ±1 mV offset
FRA / EIS  
frequency range 10 µHz to 200 kHz
ac-amplitude range

1 mV to 900 mV rms, or 2.5 V p-p

measured current accuracy ≤ 0.2% at Full Scale Range
GEIS  
frequency range 10 µHz to 200 kHz
ac-amplitude range 

0.9 * CR (Arms)

Electrometer  
electrometer amplifier input > 1 TΩ // 10 pF
bandwidth 

10 kHz default or

500 kHz for EIS and fast CA/CP

Other  
electrode connections

WE, RE, CE, S
and ground,
with 2 mm banana plugs

housing

aluminum body:
7.2 x 5.5 x 2.6 cm3

weight

± 130 g

power + communication

USB-C port

internal storage space

500 MB, equivalent to > 15M datapoints

EmStat4S HR EIS Accuracy Contour Plot

Note
The accuracy contour plots were determined with an ac-amplitude of ≤10 mV rms for all limits, except for the high impedance limit, which was determined using an ac-amplitude of 250 mV. The standard cables were used. Please note that the true limits of an impedance measurement are influenced by all components in the system, e.g. connections, the environment, and the cell.
Read more

Software

PSTrace corrosion mode

PSTrace for Windows has a special Corrosion mode, in which it provides support for all common corrosion techniques and device functionalities. With a smooth simple interface, showing only the applicable controls, PSTrace is suitable for all levels of user experience. Functions include:

  • Tafel analysis
  • Determine Corrosion Potential and Current
  • Circuit fitting
  • Determine Corrosion Rate

 

More information about PSTrace

Tafel plot analysis

The exponential relationship between the applied current at a platinum surface and the potential plotted in a graph is known as a Tafel plot. PSTrace helps you fitting a Tafel plot and deriving the corrosion current and corrosion rate.

More information about PSTrace

Circuit fitting

PSTrace supports Equivalent Circuit Fitting. Drawing your circuit and fitting your data has never been easier. The interface allows you to quickly draw or change the circuit design. The circuit and fitted data are automatically saved with your .pssession data file.

The circuit editor can be used in different modes;

  • Edit mode; draw the circuit or type CDC circuit
  • Fit mode; fit the EIS data on the circuit
  • Simulation mode; run simulations on circuits

More information about PSTrace

Downloads

Name Type Last updated
Corrosion Cell Set contents This document specifies the contents of the Corrosion Cell Set, and contains an overview of the kit and the flat specimen holder.documentation02-06-21
EmStat4S description The description document of the EmStat4S instrument contains an overview of all techniques, specifications, the software PSTrace, Countour plots, kit contents, and scripting. documentation19-05-21
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