Page 370 - Challenges in Corrosion Costs Causes Consequences and Control(2015)

348 CONSEQUENCES OF CORROSION

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Anode mesh
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Steel rebar cathode
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Figure 5.26 Impressed current system line diagram (19).

Figure 5.27 Pressure plate with a dress cap. (Figure originally published in Reference 26.
Reproduced with permission of the Canadian Institute of Mining, Metallurgy and Petroleum.
www.cim.org.)

is severely corroded at one edge and cracked leading to detached copper sheet at this
location. All of the copper cladding of commercially pure architectural grade was in
excellent condition with no significant metal loss.
The major damage to dress caps was caused by the galvanic corrosion between
copper cladding and aluminum extrusion. In the case of copper-containing solutions