Corrtest potentiostat galvanostat model CS350M with eis consists of DDS arbitrary function generator, high power potentiostat/galvanostat, dual-channel correlation analyzer, dual-channel high-speed 16bit/high-precision 24bit AD converter and extension interfaces. It can be used for various electrochemical fields such as corrosion, energy, material and electroanalysis. The current can be boosted up to 20A/40A/100A with a current booster CS2020B/ CS2040B/CS2100B.

Key harware features of corrosion testing potentiodynamic potentiostat galvanostat CS350M

- Built-in EIS/FRA, EIS Frequency range: 10μHz~1MHz

- High bandwidth and high input impedance amplifier

- Built-in FPGA DDS signal synthesizer

- High-power Potentiostat/Galvanostat/ZRA;

- Current control range: ±2A (20A/40A/100A booster optional)

- Potential control range: ±10V;

- Compliance voltage: ±21V(±30V optional)

- Potential resolution: 10μV

- Current resolution 1pA

Applications of Corrtest potentiostat galvanostat model CS350M with eis

● Study of Energy materials (Li-ion battery, solar cell, fuel cell, supercapacitors), advanced functional materials

● Electrocatalysis (HER, OER, ORR, CO2RR, NRR)

● Corrosion study and corrosion resistance evaluation of metals; quick evaluation of corrosion inhibitors, coatings, and cathodic protection efficiency

● Electrosynthesis, electroplating/electrodeposition, anode oxidation, electrolysis

Applications

Corrosion: Corrtest potentiostat galvanostat model CS350M with eis includes all the electrochemical techniques for corrosion measurement such as OCP, polarization curve (potentiodynamic), EIS, Cyclic polarization CPP (passivation curve), Electrochemical Potentiokinetic Reactivation (EPR), Hydrogen diffusion test, ZRA, Electrochemical noise, etc. It can be used to study metal corrosion mechanism and corrosion resistance, and evaluate the coating durability and sacrificial anode current efficiency. It can also be used for rapid screening of corrosion inhibitors, fungicides, etc.

Left: Polarization curves of Ti-alloy& stainless steel in 3%NaCl solution

Right: EN of low-carbon steel in 0.05mol/LCl+0.1mol/LNaHCO3

Corrtest potentiostat galvanostat model CS350M with eis uses correlation integral algorithm and dual-channel over- sampling technique, and has strong anti-interference ability. The internal resistance of the instrument is up to 10¹³Ω. It's suitable for EIS measurements of high-impedance system (such as coating, concrete etc)

Salt spray aging test of high impedance coating

Energy

With techniques LSV, CV, galvanostatic charge and discharge (GCD), Constant potential/ current EIS, and precise IR compensation circuit, Corrtest potentiostat galvanostat model CS350M with eis is widely used in supercapacitor, Li-ion batteries, sodium-ion batteries, fuel cell, Li-S batteries, solar cell, solid-state batteries, flow batteries, metal-air batteries etc. It is an excellent scientific tool for researchers in the fields of energy and materials.

CV curve of PPy supercapacitor in 0.5 mol/L H2SO4 solution

Electro-catalysis

● Corrtest potentiostat galvanostat model CS350M with eis can measure the half-wave potential (ORR), overpotential (HER, OER) of the catalyst, and has the function of peak power density and energy density calculation.

● Long-term cyclic measurement for ORR, OER, HER,

CO2RR by techniques such as cyclic voltammetry,

potentiostatic, galvanostatic. Faraday efficiency can be

measured with a bipotentiostat.

LSV curve of catalysts in alkaline solution

● Maximum current can be 20A and compliance voltage can be 30V, and with IR compensation technique,

Corrtest potentiostat galvanostat model CS350M with eis can precisely measure the

overpotential of the electrode, which is a big advantage in electrocatalysis field.

Advantages of Corrtest potentiostat galvanostat model CS350M with eis

Full floating

All Corrtest potentiostats / galvanostats incl. potentiostat galvanostat model CS350M with eis are designed as full-floating, and can be used for electrochemical study of working electrode connecting to earth, such as autoclave, metal part in bridge, concrete

Real-time data storage

Experiment data can be stored in real time. Even if the test is interrupted by a power failure, the data will be automatically saved. The data is compatible with Excel, Origin, and can be directly opened.

Electrochemical impedance spectroscopy(EIS)

● Corrtest potentiostat galvanostat model CS350M with eis uses correlation integral algorithm and dual-channel over-sampling technique, and has strong anti-interference ability. The internal resistance of the instrument is up to 10¹³Ω. It's suitable for EIS measurements of high-impedance system (such as coating, concrete etc.)

● With constant current carrier and DC bias technology, Corrtest potentiostat galvanostat model CS350M with eis can be used for battery impedance measurement under charge and discharge state, suitable for ultra-low resistance system (such as 18650 battery, soft pack battery, battery core...)

Multi electrode system

● Corrtest potentiostat galvanostat model CS350M with eis supports 2-, 3-, 4-electrode system, can be used to test battery internal resistance or 4-electrode thin film impedance measurement

● Zero resistance ammeter for galvanic current measurement

Software development kit (SDK)

Corrtest potentiostat galvanostat model CS350M with eis provide secondary development interfaces,API general interfaces and development examples, and can realize data call for Labview, C, C++, C#, VC and other program.

High current, high compliance options

●With the CS2020B/CS2040B/CS2100B booster, the current can be boosted to 20A/40A/100A, which meets the requirement in fuel cell, power battery, electroplating, etc

● Compliance voltage of Corrtest potentiostat galvanostat model CS350M with eis can be tailored to be ±30V, which meets the test requirement in low-conductivity solutions (organic system, concrete system etc), especially suitable for carbon and nitrogen reduction study.

Versatile data analysis

CS Studio is the software for Corrtest potentiostat galvanostat model CS350M with eis for experiment control and data analysis. It can do: multi-parameter Tafel curve fitting, derivation, integration and peak height analysis of voltammetric curve, EIS equivalent circuit customization and impedance spectrum fitting, etc.

● Multi-parameters Polarization curve

● EIS fitting

● Electrochemical noise analysis

● Pseudo capacitance calculation

● GCD specific capacitance, efficiency

● Mott-Schottky plot analysis

● CV analysis

Combination test

CS studio software supports the combination test for various experiments to achieve flexible and

unattended test. You can set the parameters for each experiment in advance, and set the intervals, wait time etc between each experiment.

Combination Test: corrosion tests Combination Test: Pseudo capacitor tests

Software Features of Corrtest potentiostat galvanostat model CS350M with eis

Cyclic voltammetry: 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, during the data analysis, there is function of selecting exact cycle(s) to show.

Tafel plot and corrosion rate: 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 ECN measurements.

Battery Test and analysis:

charge & discharge efficiency, capacity, specific capacitance, charge & discharge energy.

EIS analysis: Bode, Nyquist, Mott-Schottky plot

During EIS data analysis, there is built-in fitting function to draw the custom equivalent circuit.

Techniques of Corrtest potentiostat galvanostat model CS350M with eis

    CorrTest Instruments Co. (China) manufactured her first full-digital potentiostat/galvanostat for corrosion electrochemistry in 1995. After 29 years of research and development, CorrTest has developed a series of electrochemical workstations dedicated to electroanalysis, corrosion, electrocatalysis, energy material research, sensors, electrodeposition etc. CorrTest has registered CorrTest^® trademark and acquired a number of patents, software copyrights.

    CorrTest has also developed different kinds of corrosion sensors and meters, corrosion management networks for on-site corrosion monitoring and risk evaluation of oilfields, petrochemicals, construction and offshore wind farms.

    “Quality from Technology", "Progess from Profession" is our motto for research and development. CorrTest will continue to provide customers with high-quality products and professional services.

1995：1^st electrochemical potentiostat was made based on AD&DA multifunction board

2007：CorrTest was officially established with 1^st generation CS350 potentiostat designed

2015：2^nd generation CS350G potentiostat with the achievement of 1MHz impedance

2016：Listed on China’s New OTC market and embarked on 1^st generation corrosion meters

2017：3^rd generation CS350H potentiostat, specializing in EIS for high-impedance coating

2021：4^th generation, CS350M and CS310X multichannel products

2023：5^th generation, CS2020B high-power booster to enhance CS350M output current