B5.4 - Non-Destructive and Non-Contact Testing of Coatings
- SENSOR+TEST Conferences 2011
2011-06-07 - 2011-06-09
- Proceedings SENSOR 2011
- B5 - Sensor-Packaging
- A. Bariska, N. Reinke - ZHAW, Winterthur (Switzerland)
- 309 - 311
Many everyday items are coated, both to protect and/or to decorate them. Outer surfaces of transport vehicles require multi-layered corrosion-protection coating, chip-protection coating and decorative coating optimized for their specific uses. Wear and tear of parts in combustion engines, gas turbines and industrial manufacturing plants can be reduced and their lifespan extended thanks to highly effective protective coatings. The monitoring of the thickness of the coatings and other coating features has, up to now, been complicated and costly.
The ICP Institute of Computational Physics and the IDP Institute of Data Analysis and Process Design of the ZHAW School of Engineering (Winterthur, Switzerland) have, together with a number of industrial partners, developed a process that makes possible rapid, non-contact and non-destructive testing of multi-layered coatings on metal, ceramic, plastic and wood surfaces.
The method is based on the pulsed heating of the coating and the recording of the temperature evolution using high-speed, infrared sensors. It allows determining thickness as well as material properties (e.g. porosity) or adhesion of the coating. The measuring system is robust, impervious to distance and tilting, and suitable for both the inline monitoring of coating processes as well as for sample inspection in industrial environments. In this lecture we present an overview of the developed technology and results from test cases (thermally sprayed ceramic coatings as well as lacquered metal, stone and acryl glass samples).