Issue 46

F. Bazzucchi et alii, Frattura ed Integrità Strutturale, 46 (2018) 400-421; DOI: 10.3221/IGF-ESIS.46.37 411 steel by the higher electronegative power of the sacrificial anode. The monitoring of these devices can be executed by simple electronic tester that measures electricity rates in the anodes. When the exposed reinforcement is large and interconnected (i.e. a wire mesh), an alternative solution is the cathode protection. In this case, an electric current is supplied to the steel by an external generator, shielding the reinforcement from corrosion. Figure 15 : Suggested retrofitting. Level 1 damage (a) ; Level 2 damage (b) ; Level 3 damage (c) ; Level 4 damage (d) . Figure 16 : galvanic protection: sacrificial anode [Copyright: Mapei].