Mechanisms of thermal insulation corrosion
Corrosion under insulation (CUI)
Article REF: COR150 V1
Mechanisms of thermal insulation corrosion
Corrosion under insulation (CUI)

Authors : Jean KITTEL, François ROPITAL

Publication date: January 10, 2016 | Lire en français

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1. Mechanisms of thermal insulation corrosion

1.1 Corrosion factors

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1.1.1 Presence of liquid water under the insulation system

The prerequisite for lagging corrosion to occur is the presence of liquid water in contact with the metal surface, over a sufficient period of time for the effects of corrosion to manifest themselves. The arrival of liquid water in contact with lagged metal walls generally requires a leak in the insulation system.

There are many possible infiltration modes or sources of liquid water:

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