CUI – CORROSION UNDER INSULATION

Many corrosion processes are hidden to human eye. Insulated vessels and pipelines can serve as a good example. Where convenient conditions are created – temperature and humidity between the material and the insulation, unsuitable type of material, incorrect protection, or even damaged insulation that allows rain water seeping in – the corrosive processes can be quite serious. This is called CUI (Corrosion Under Insulation).

It is necessary to look for critical spots in operation, perform corrosion damage assessment, or deal with the corrosion speed, and of course design and implement corrective measures. To identify the corrosion under insulation and residual thickness of the base material we use various non-destructive testing methods – irradiation for smaller diameters, RT LIXI, Guided Waves, pulse eddy currents (PEC), or electromagnetic methods.