Electrodes installation

It is common practice to decide reference electrode locations from the results of a surface potential mapping survey. Electrodes are normally embedded at locations with the most negative surface potentials, i.e. the locations most likely to corrode. In new structures, it is common to install reference electrodes at locations most likely to be exposed to future corrosion problems. The number of reference electrodes installed will mainly depend on the size and complexity of the structure and the cost. 

Table 3.3 Characteristics of reference electrodes installed in Gimspystraumen Bridge [31]...

FIGURE 4.7 Schematic showing the construction and installation of field electrodes. (1) Platinum wire of 1.024 mm diameter, (2) waterproof epoxy, (3) copper wire, (4) heat-shrinking insulation, (5) reference electrode, (6) voltmeter, and (7) electrodes installed at different depths. 

Electrolytic reactive barriers (also known as e barriers) consist of closely spaced permeable electrodes installed in a trench perpendicular to the direction of ground-water flow intercepts a groundwater contaminant plume, similar to PRBs. Rgure... 

Phase 4. Electrode Installation. Electrode installation took place in June, 2002. Electrodes were to be installed parallel to the long side of the rectangular cell (Fig. 32.7a). Figure 32.7b shows the stages of cell construction including electrode placement. The electrodes (anodes and cathodes) were constructed from steel pipe, although steel sheet pile was another option it was simply a matter... 

Particles are collected on flat, parallel surfaces that are about 250 mms apart, with the discharge electrodes installed between the adjacent plates. The contaminated gases pass through the passage between the plates, and the particles become charged and adhere to the collection plates. 

Equipment is lined inside with refractory bricks for protection of the shell The shell is not subjected to the heating medium as well as the reaction medium. This type of equipment cannot have heating jackets due to poor thermal conductivity of the bricks. It has electrical heating by electrodes installed inside or has induction heating method. It can also have internal heating coils of special MOC which can resist the material to be heated. 

In capacitance tomography, the measurement setup consists of an array of electrodes installed around the external surface of the monitored system, and measurements of capacitance between various pairs of electrodes are performed, so that data is received on the capacitance in various directions within the system. Then, from the algorithm described above, the volume fraction of solids or gas within the system can be calculated. Examples of various sources for fluidized bed CTs are presented in Table 14. An example setup and results are shown in Fig. 43. 

Halow and Nicoletti (1992) Capacitance Studies on voidage distribution in the fluidized bed, bed diameter 0.15 m, sensing electrodes installed round the riser in four rings, each containing 32 electrodes... 

Figure 4-2e-2. Glasteer Electrode Installation (Courtesy of Yokogawa)...

Tlie most prevalent electrode installation assembly until the 1990s was a flow through cell chamber or a simple pipe tee into which a probe was threaded. A small sample stream is d iverted from the tank or pipeline and... 

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