LPR

The ASTM G59-97 method explains the use of a potentiodynamic linear sweep measurement to quantify the corrosion processes. Typically, this technique is used to measure and monitor corrosion on a day-to-day basis. A range of voltages are applied to a solid test sample and the corresponding current is measured using a three-electrode setup. First, the polarization resistance is obtained from the slope of the linear sweep plot at zero voltage. Then, a Tafel Slope analysis allows the usage of the Butler-Volmer equation for precise measurements on corrosion currents and corrosion rates.

Every instrument offered by Metrohm is equipped with an LPR protocol. A dedicated LPR analyzer kit that includes all
requirements for conducting a typical ASTM G59-97 test is also available.

Application: Corrosion monitoring and measurements in industries and corrosion labs

Protocol for linear polarization with built-in OCP evaluation
Change voltage or scan rate during a measurement
Procedure scheduler: for long or multiple runs, experiments can be scheduled with added wait times
Automated secondary signal creation for direct Tafel plot analysis (I/A2, Log I, etc.)
High resolution vector graphics with export and printing options
Automatic calculation of kinetic rate constants
Direct determination of polarization resistance and corrosion rates

Corrosion Parameters by Linear Polarization Resistance (LPR) Measurements

Application Notes:

Unique Software Features for LPR Measurements