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Electrochemical Noise Corrosion Monitor System

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Technology
Summary Sheet

Technology
Deployment
Fact Sheets:
AR #847
AR #1867

Innovative Technology
Summary Report

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Tech ID: 1985
Project Overview
The use of an electrochemical noise corrosion probe and corrosion inhibitor monitors in a high-level waste tanks will allow for real-time monitoring of corrosion processes and corrosion inhibitor effectiveness. The Hanford Site and the Savannah River Site jointly developed the current corrosion program.

Technology Description
 The electrochemical noise-based corrosion monitoring system measures instantaneous fluctuations in corrosion current and potential between three electrodes of the material of interest immersed in the environment of interest. Electrical potential differences are measured and analyzed. It has been shown that corrosion phenomena are related to the corrosion current and electrical potential transients. Data from this probe will be used to design an improved second-generation probe. The Savannah River Site is considering installing these probes in their tanks. A corrosion inhibitor monitor is being developed for deployment in a Savannah River Site tank. The monitor will continuously measure concentrations of nitrate, nitrite and hydroxide ions, which are the key to minimizing corrosion in steel tanks. Data from the monitors will minimize sampling requirements and chemical additions to the tanks. In conjunction with the electrochemical noise probe, the optimum concentrations for minimizing corrosion can be determined.

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