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Last updated : 11 Aug, 2017

Cyclic Voltammeter and Corrosion inhibition study

BioLogic SP-150 Potentiostat / Galvanostat

Current Range: 10 µA to 1 A

  • Control Voltage: ±10 V
  • Compliance: 20 V Range for SP-150 Adjustable from [-20;0] V to [0;+20] V
  • Voltage Resolution: 300 µV Down to 5 µV by Adjusting Dynamic Range
  • Acquisition Time: 200 µs with EC-Lab; 20 µs with EC-Lab Express
  • The SP-150 utilizes the EC-Lab software. EC-Lab Express software has been designed to be easy to use and allows for quick set up of an experiment


SP-150 Make Potentiostat/ Galvanostat is used for carrying out cyclic voltammetry of the developed molecule wherefrom the redox state of the molecule can be ascertained. In addition to it electrochemical impedance spectroscopy, potentiodynamic polarization, rest potential check can also be performed by this sophisticated analytical instrumentation.

Cyclic voltammetry: Cyclic voltammetry involves sweeping of the potential in a positive direction until a predetermined value of current or potential is reached, then the scan is immediately reversed towards more negative values until the original value of potential is reverted.

Electrochemical impedance spectroscopy: Electrochemical impedance spectroscopy (EIS) is used to study a wide variety of systems in many fields of electrochemistry including corrosion inhibition study. The system under test is generally perturbed by a sine wave current or potential of small amplitude.  Measurements as a function of frequency of the perturbation give an impedance (or admittance) diagram. Explanations of impedance diagram are made in terms of electrical equivalent circuits or in terms of Faradic impedance which depends on the electrode reactions. Generally, corrosion study is performed in our Laboratory by employing this technique.

Potentiodynamic Polarization: Potentiodynamic polarization is often used for laboratory corrosion testing. This technique can provide significant useful information regarding the corrosion mechanism, corrosion rate and susceptibility of specific materials to corrosion in designated environments. Polarization methods involve changing the potential of the working electrode and monitoring the current which is produced as a function of time or potential.

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