Three electrode potentiostat galvanostat
Corrtest Potentiostat Galvanostat is suitable for 2, 3, 4 or 5 electrode system. It contains a fast digital function generator, high-speed data acquisition circuitry, a potentiostat and a galvanostat. With high performance in stability and accuracy with advanced hardware and well-functioned software, it is a comprehensive research platform for corrosion, batteries, electrochemical analysis, sensor, life science and environmental chemistry etc.It will service your experiment with excellent performance.
HARDWARE FEATURES
Dual-channel high-speed 16bit/high-accuracy 24bit AD converter;
Built-in frequency response analyzer(FRA), frequency range: 10μHz~1MHz;
High-bandwidth high input impedance amplifier unit
Built-in FPGA DDS digital signals synthesizer
High-power Potentiostat/Galvanostat/ZRA;
Potential control range: ±10V; Compliance voltage: ±21V;
Current control range: ±2A ;
Potential resolution: 10μV; current resolution 1pA.
SOFTWARE FEATURES
1. CS studio software provides users a versatile smoothing/differential/ integration kit, which can complete the calculation of peak height, peak area and peak potential of CV curves. In CV technique and constant current charge and discharge, after measurement, during the data analysis, there is function of selecting the exact cycle(s) to show
2. CS studio also provides powerful non-linear fitting on Butler-Volmer equation of polarization curve. It can calculate Tafel slope, corrosion current density, limitation current, polarization resistance, corrosion rate. It can also calculate the power spectrum density, noise resistance and noise spectrum resistance based on the electrochemical noise measurements.
3. CS Studio software can achieve real time saving of the measuring data. The data can be automatically saved even in case of sudden power off.
4. CS studio kit has a built-in versatile timing policy for combination tests, which can facilitate the automation of experiments and save time.
5. CS studio software can achieve timing measurements. After setting the experiment and time, click start, then the experiment will be conducted automatically when it is the time.
6. Battery analysis: charge & discharge efficiency, capacity, specific capacitance, charge & discharge energy etc.
7. EIS analysis: Bode, Nyquist, Mott-Schottky plot
8. Data open in notepad( txt format) and Origin
9. 3D display
TECHNICAL ADVANTAGES
1. Impedance (EIS)
Corrtest Potentiostat Galvanostat applies correlation integral algorithm and dual-channel over-sampling technique, and has strong anti-interference ability. It is suitable for EIS measurements of high-impedance system (>109Ω, such as coating, concrete etc.). It can also be used to obtain Mott-Schottky curve and differential capacitance curve. During test, the software can display real-time open circuit potential(OCP) without entering.
2. Polarization curve
It can complete linear polarization curve and Tafel plot measurements. The user can set the anodic reversal current (passivation film breakdown current) of the cyclic polarization curve to determine material's pitting potential and protection potential and evaluate the its susceptibility to intergranular corrosion. The software employs non-linear fitting to analyze polarization curve, and can make fast evaluation of material's anti-corrosion ability and inhibitors.
3. Voltammetry
It can do the following electroanalysis methods: Linear Sweep Voltammetry(LSV), Cyclic Voltammetry(CV), Staircase Cyclic Voltammetry(SCV), Square wave voltammetry(SWV), Differential Pulse Voltammetry(DPV), Normal Pulse Voltammetry(NPV), AC voltammetry(ACV), Stripping voltammetry etc. It integrates calculation of peak area, peak current and standard curve analysis.
4. Electrochemical Noise
With high-resistance follower and zero-resistance ammeter, it measures the natural potential/current fluctuations in corrosion system. It can be used to study pitting corrosion, galvanic corrosion, crevice corrosion, and stress corrosion cracking etc. Through noise spectrum, we can evaluate the inducement, growth and death of metastable pitting and crack. Based on calculation of noise resistance and pitting index, it can complete localized corrosion monitoring.
5. Full floating measurement
Corrtest Potentiostat Galvanostat uses full-floating working electrode. It can be used for autoclave electrochemical measurements, on-line corrosion monitoring of metallic components under the ground (rebar in concrete, etc.)
6. User-defined methods
Corrtest Potentiostat Galvanostat supports user-defined combination measurements. The user can set cyclic timing measurements of an electrochemical method or several methods.
We are able to provide API functions and development examples, which facilitates some users' requirements for secondary development and self-defined measurements.
Specifications
| Specifications |
| Support 2-, 3- or 4-electrode system |
| Potential control range: ±10V |
Current control range: ±2A |
| Potential control accuracy: 0.1%×full range±1mV |
Current control accuracy: 0.1%×full range |
| Potential resolution: 10μV (>100Hz),3μV (<10Hz) |
Current sensitivity:1pA |
| Rise time: <1μS (<10mA), <10μS (<2A) |
Reference electrode input impedance:1012Ω||20pF |
| Current range: 2nA~2A, 10 ranges |
Compliance voltage: ±21V |
| Maximum current output: 2A |
CV and LSV scan rate : 0.001mV~10,000V/s |
| CA and CC pulse width: 0.0001~65,000s |
Current increment during scan: 1mA@1A/ms |
| Potential increment during scan: 0.076mV@1V/ms |
SWV frequency: 0.001~100 kHz |
| DPV and NPV pulse width: 0.0001~1000s |
AD data acquisition:16bit@1 MHz,20bit@1 kHz |
| DA Resolution:16bit, setup time:1μs |
Minimum potential increment in CV: 0.075mV |
| IMP frequency: 10μHz~1MHz |
Low-pass filters: Covering 8-decade |
| Potential and current range: Automatic |
| PC and O/S requirement |
| Interface: USB 2.0 |
Operating System: Windows 2000/NT/XP/ win7/win8/win10 |
| Weight / Measurements |
| Net weight: 6.5kg Gross weight: 10kg |
| Instrument size: 36.5 x 30.5 x16cm; After package: 52.5 x 37.5x 22.5cm |
| Electrochemical Impedance Spectroscopy(EIS) |
| Signal generator |
| Frequency range:10μHz~1MHz |
AC amplitude:1mV~2500mV |
| DC Bias:-10~+10V |
Output impedance:50Ω |
| Waveform: sine wave, triangular wave and square wave |
Wave distortion:<1% |
| Scanning mode: logarithmic/linear, increase/decrease |
| Signal analyzer |
| Integral time:minimum:10ms or the longest time of a cycle |
Maximum:106 cycles or 105s |
| Measurement delay:0~105s |
| DC offset compensation |
| Potential automatic compensation range:-10V~+10V |
Current compensation range:-1A~+1A |
| Bandwidth: 8-decade frequency range, automatic and manual setting |
Software
Techniques included in CS350
Stable polarization: Open Circuit Potential (OCP), Potentiostatic (I-T measurement), Galvanostatic, Potentiodynamic (Tafel plot), Galvanodynamic
Transient polarization: Multi-Potential Steps, Multi-Current Steps, Potential Stair-Step (VSTEP), Galvanic Stair-Step (ISTEP)
Chrono Methods: Chronopotentiometry (CP), Chronoamperometry (CA), Chronocoulometry (CC)
Voltammetry: Cyclic Voltammetry (CV), Linear Sweep Voltammetry (LSV), Staircase Voltammetry (SCV), Differential Pulse Voltammetry (DPV), Normal Pulse Voltammetry (NPV), Square wave voltammetry (SWV), ACvoltammetry (ACV), Differential Normal Pulse Voltammetry (DNPV), 2nd Harmonic A. C. Voltammetry (SHACV), Fourier Transform AC Voltammetry(FTACV)
Stripping Voltammetry: Potentiostatic stripping, Linear stripping, Staircase stripping, Square wave stripping, Differential Pulse Voltammetry Stripping, Normal Pulse Voltammetry Stripping, Differential Normal Pulse Voltammetry Stripping.
Amprometric: Differential Pulse Amperometry(DPA), Double Differential PulseAmperometry(DDPA),Triple Pulse Amperometry (TPA), Integrated Pulse Amperometric Detection (IPAD)
Impedance: EIS vs Frequency (IMP), EIS vs Time (IMPT), EIS vs Potential (IMPE)
Corrosion testing: Electrochemical Noise (EN), Zero Resistance Ammeter (ZRA), Electrochemical Potentiokinetic Reactivation(EPR)
Battery testing: Battery charge and discharge, Galvanostatic charge and discharge
Extensions: Data Logger, Electrochemical stripping/deposition, Bulk electrolysis with Coulometry
How to understand three electrode system and two electrode system
The three electrode system is composed of working electrode (WE), reference electrode (RE) and counter electrode (CE). WE and CE constitute polarization circuit. WE and RE constitute measurement circuit. There is no current flow on RE. Current flows from the WE to CE. No current flows through RE.
Working electrode(WE) is the Object of the research.
Pay attention that the surface of the WE should be clean. That's very important during electrochemical measurements. Once the surface is contaminated with impurities, there will be interference current.
Reference Electrode (RE): an electrode with a constant electrochemical potential. Not change with current and experiment conditions
Counter Electrode (CE): a current-carrying electrode that completes the cell circuit. It doesn't affect the experiment results, no matter the shape, material, and reactions.
Two-electrode system there is no individual RE involved in the experiment in two-electrode system. When using the Corrtest potentiostat galvanostat for two-electrode system testing, the CE can be used as RE to provide reference potential. During measurements, you need to connect the RE&CE clamps to one common electrode.
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