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Wednesday, 01 April 2020
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Raw materials & technologies, Production and testing

Non-destructive detecting of corrosion under coatings

Thursday, 10 May 2012

New method based on pulsed phase thermography can monitor the corrosion progress underneath coatings.

New method can detect corrosion underneath a coating

Bild: Simon Cataubo/sxc

New method can detect corrosion underneath a coating

Bild: Simon Cataubo/sxc

Researchers from the automobile manufacturer BMW, the University of Erlangen-Nuremberg (Germany), the Centre for Electron Microscopy Graz (Austria) and Edevis (Germany) have developed a non-destructive method for analysing and quantifying the corrosion attack. The method focuses on pulsed phase thermography (PPT). In the study, the researchers examined cold-rolled steel and hot-dip-galvanized steel panels with a phosphating surface treatment coated with a cathodic dip-paint (CDP). Additionally, they used thick-film CDP and powder paints. Prior to exposure to the corrosion test, stone chipping defects with different geometries were applied. Algorithms reconstructed the information into a single 3D data set with accurate topographical information. Results of measurements revealed that the pulsed phase thermography can fast and reliably monitor the corrosion progress.

To the abstract of the study

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