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Table 3 Comparison of steel corrosion depths cited in the H12 (JNC 2000), Kristallin-1 (Nagra 1994) and H17 (JNC 2005) safety assessments with a range of archaeological analogue data for steel/iron artefacts

From: Natural analogues: studies of geological processes relevant to radioactive waste disposal in deep geological repositories

Form of data

Corrosion depth (per 1000a)

References

Comments

Short-term lab

31.8 mm

JNC (2000)

Uniform corrosion of carbon steel. Base case value

Short-term lab

29 mm

NWGCT (1984)

Conservative corrosion rate, including an allowance for pitting. Base case value

Natural analogue

0.09 × 10−3 mm

Hellmuth (1991a, b)

Weathering of native iron in basalt (Disko Island). These are very low values which may reflect the site complexity. See discussion in Hellmuth (1991a, b) and Miller et al. (2000)

Archaeological analogue

10 mm

Range of studies cited in Nagra (1994)

Uniform corrosion of iron and steel

Archaeological analogue

<15 mm

Range of studies cited in JNC (2000)

Uniform corrosion of iron and steel

Archaeological analogue

0.1–10

David (2001)

Literature review of archaeological samples

Archaeological analogue

<10 mm

Range of studies cited in JNC (2005)

Uniform corrosion of iron and steel