Instrumentation and monitoring of structures - Concrete Repair - page 141

Figure 7.3 Three years' data from corrosion rate probes shown in Figure 4.1 from the
Dartford Tunnel, England (Broomfield et al. 2003) (courtesy NACE International).
Figure 7.4 Galvanic ladder probe (Raupach and Schiessl 1995). Ladders are at an
incline through the cover so that successive rungs depassivate and a galvanic current
starts to flow between the anode and a noble metal cathode (courtesy Dr Ing. M.
Raupach).