Detection of decohesion/failure of paint/coating using electronic speckle pattern interferometry

Corrosion resistance of various industrial components depend on the performance of paints and coatings. An early and accurate detection of decohesion of paints/coatings is invaluable in proper maintenance of the coated components. Recent advances in the electronic speckle pattern interferometry provide capabilities of sensitive and precise detection of out-of-plane displacements. This paper presents recent laboratory results investigating the application of ESPI as a non-contact and non-destructive technique in detection of decohesion of some typical industrial paints for naval applications.