Fig. 8
From: Inspecting the corrosion state of underground reinforced concrete structures
Setup for the outdoor test of the developed underground corrosion detection system consisting of 10 bars equally spaced 70 cm apart from each other (8 rods 12% chromium steel Ø = 16 mm and 2 galvanised steel rods Ø = 14 mm), which forming a galvanic cell. A borehole was made between two excavations 6.3 m apart from each other at a depth of approximately 70 cm and 20 cm apart from the steels and parallel to them