DVIT (Differential Video Imaging Technique) is an in situ technique for locating sites of corrosion on a metal surface. A color CCD camera is used to acquire a series of images of the surface. By using our proprietary algorithms to analyze small differences between these images, sites of corrosion initiation may be identified and characterized. DVIT is, then, a difference imaging method.
DVIT may be done with a chemical indicator dye in solution. For example, a pH indicator may be used to locate sites where pH changes more than at surrounding points on a metal surface.
DVIT may be combined with SVET or SIET, to simultaneously acquire data with DVIT and another of those techniques.
The spatial resolution that DVIT can attain depends on the camera resolution, and the microscope magnification used.
Applicable Electronics sells a system that includes everything you need for DVIT. It includes
For an example of DVIT data, click on this link to obtain a file: [DVIT]
Below are links to papers, slide presentations and movie that describe and illustrate metal surface analysis by DVIT.