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Table 2 Microbial activity (SRB and ThRB) at the E24 metal surface (swabs) and in Opalinus Clay pore-water taken from the reservoir in surface in the IC experiment

From: Corrosion of carbon steel in clay environments relevant to radioactive waste geological disposals, Mont Terri rock laboratory (Switzerland)

Samples

Swabs (E24-a)

Stagnant water (reservoir)

Bacteria concentration

30 °C bacteria/cm2

60 °C bacteria/cm2

30 °C bacteria/mL

60 °C bacteria/mL

Sulphate-reducing bacteria (SRB)

33

3.3 102

25

2.5

Thiosulphate-reducing bacteria (ThRB)

3.3

3.3

25

<0.5