The electrodes are designed to detect the onset of pitting and stress corrosion cracking should tank conditions change to allow these phenomena to occur. Tank waste is in liquid, solid, and sludge forms.
Tanks also contain a vapor space above the solid and liquid waste regions.
Time-dependent fluctuations in corrosion current between the working and counter electrodes are described by electrochemical current noise. However, statistical analysis techniques will be employed. In addition, it will be used to monitor the effectiveness of upcoming sodium hydroxide corrosion inhibitor additions. It fits through a nominal 10.2-cm diameter tank riser and is approximately 16.2 m in length. A schematic of the probe is shown in Figure 1 .