Basic Package

Polarization curves and Tafel plots

The EmStat3+ is a small research grade potentiostat supporting most common electrochemical techniques, including Potentiostatic Polarization, Linear Polarization, Cyclic Polarization and Corrosion potential measurements. Together with our Corrosion Handbook and the Corrosion Cell Kit it makes a good combination to get going with electrochemical corrosion studies.

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  • Description
  • Techniques
  • Specifications
  • Software
  • Corrosion Cell
  • Handbook

    • Product description

    EmStat3+ is a small (6.7 x 5.0 x 2.8 cm) and low cost potentiostat with research grade capabilities. It has a wide range of current ranges available up to 100 mA for determining corrosion rates. It offers all common electrochemical techniques used for corrosion analysis; Linear Polarization, Cyclic Polarization, Corrosion potential measurement as well as applying a constant potential and measuring the open circuit potential (EOC).

    The instrument comes with PSTrace5 software which allows for different corrosion analytical techniques for automatic or manual analysis.

    Standard included with an EmStat3+ package:

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

    Techniques

    The following techniques are supported by EmStat3+:

    Corrosion techniques:

    • Potentiostatic Polarization
    • Linear Polarization
    • Cyclic Polarization
    • Corrosion Potential

    Voltammetric techniques:

    • Linear sweep voltammetry (LSV)
    • Differential pulse voltammetry (DPV)
    • Square wave voltammetry (SWV)
    • Normal pulse voltammetry (NPV)
    • Cyclic voltammetry (CV)

    These methods can all be used in their stripping modes which are applied for (ultra-) trace analysis.

    Techniques as a function of time:

    • Chronoamperometry (CA)
    • Pulsed amperometric detection (PAD)
    • Multiple pulse amperometry (MPAD)
    • Open circuit potentiometry (OCP)
    • Multistep amperometry (MA)

    EmStat3+ specifications

    General
    dc-potential range ± 4.000 V
    compliance voltage ± 8 V
    maximum current ± 100 mA typical

     

    Potentiostat
    applied dc-potential resolution 0.125 mV
    applied dc-potential accuracy 0.3 %
    current ranges 1 nA to 100 mA (9 ranges)
    measured current resolution 0.1% of current range, 1 pA at lowest current range
    current accuracy ≤ 1 %of current range at 1 nA ≤ 0.5 % at 10 nA ≤ 0.2 % at 100 nA to 100 uA ≤ 0.5 % at 1 mA, 10 mA and 100 mA all with max. 0.2 % offset error

     

    Electrometer
    electrometer amplifier input       > 100 Gohm // 4 pF
    rise time     approx. 100 μs
    sensor connection shielded cable with circular connector for WE, RE, CE and Sense EmStat3+ only

     

    EmStat3+ (basic package) EmStat3+ Blue (standard package)
    size 6.7 x 5.0 x 2.8 cm (2.6 x 2.0 x 1.1 inch) 10.0 x 6.0 x 3.4 cm (3.9 x 2.4 x 1.3 inch)
    weight 85 g 250 g
    battery no yes
    communication USB USB + Bluetooth
    auxiliary port no yes
    sensor connector LEMO LEMO + SPE

    PSTrace5 for Windows

     

    PSTrace software is shipped as standard with PalmSens and Emstat instruments. The software provides support for all techniques and device functionalities. With a smooth simple interface, showing only the applicable controls, PSTrace is suitable for all levels of user experience.

    Corrosion Mode

    The PSTrace5 Corrosion Mode contains functions for automated Tafel Plot of Polarization Curves instantly providing:
    ▪ Corrosion Potential
    ▪ Corrosion Current
    ▪ Tafel Slopes
    ▪ Corrosion Rate

    Electrochemical Impedance Spectroscopy (EIS) allows observing:
    ▪ Changes on Surface Properties
    ▪ Pitting Corrosion
    ▪ Water uptake of a coating
    ▪ Estimation of Delamination Area
    ▪ Estimation of Time to Failure

     

    This Kit will provide you a standard corrosion cell with a sample holder for metal coupons (up to 15 mm diameter) exposing 1 cm diameter round area to the solution as well as the equipment for the Stern-Makrides arrangement. This cell is suitable for many common corrosion related measurements. The Corrosion Cell Set is made by ItalSens and contains:

    • 1 x 1 L glass vessel
    • 2 x graphite counter electrode with holder
    • 1 x saturated calomel electrode with salt bridge
    • 1 x sample holder for flat coupons
    • 2 x platinum counter electrodes
    • 1 x parts for the Stern-Makrides arrangement
    • spare O-rings and Teflon parts

    If you are just starting starting with electrochemistry or you have experience in electrochemistry but not in corrosion research, this handbook will provide some essential knowledge to you, which will enable you to perform first measurements and to dive deeper into corrosion literature, if necessary, equipped with the right terminology and a grasp of the principles.

    The tutorials in this more than 40 pages document want to explain some basic knowledge of corrosion research with a focus on Linear Polarization Curves and Electrochemical Impedance Spectroscopy EIS. Furthermore it should afterwards be possible to have a general idea of what can be read from the Tafel plot and the EIS spectrum. Some typical shapes of curves and spectra will be shown, to develop some feeling for possible phenomena and indicators.

    Parts of the handbook can be found in the Tutorials section.

Quotation

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