A quite popular experiment performed with Gamry Instruments’ potentiostats is the Potentiodynamic Scan and its sibling, Cyclic Polarization. These experiments are often used to study corrosion at a surface. This Application Note examines these two types of experiments. See our Application Note “Getting Started with Electrochemical Corrosion Measurement” for the basics. Potentiodynamic scans are discussed in the ASTM G59 standard, while cyclic polarization scans are discussed in the ASTM G61 standard.