Introduction

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.

Most metallic corrosion occurs via electrochemical reactions at the interface between the metal and an electrolyte solution.

Measuring corrosion rate of mild steel by three different techniques; Polarization Resistance, EIS, and our newest technique, Electrochemical Frequency Modulation, or EFM for short.

The Rapid Electrochemical Assessment of Paint (REAP) is a procedure designed to estimate the long-term corrosion resistance of coated metals using short term electrochemical tests.

Linear polarization resistance (LPR) is a quick, nondestructive testing technique commonly used in material corrosion studies to gain corrosion rate data.

Localized corrosion, including crevice corrosion, is a leading cause of corrosion-induced failures. THE Method (Tsujikawa-Hisamatsu-Electrochemical Method) has been proposed to measure crevice corrosion repassivation potentials.

Autoclaves come in many sizes and shapes, from 1 ml to a meter in diameter and several meters high.