Share January, 2014Corrosion under insulation (CUI) is corrosion of piping, tanks, or other equipment that occurs due to water under insulation or ﬁreprooﬁng. Faulty or damaged insulation is frequently a source of the water that causes corrosion, and the insulation may also hide the damage so you are not aware of it. Download & Read This ArticleCopyright Permissions: Would you like to reuse content from CEP Magazine? It’s easy to request permission to reuse content. Simply click here to connect instantly to licensing services, where you can choose from a list of options regarding how you would like to reuse the desired content and complete the transaction.