On the Application of Acoustic Emission Analysis to Evaluate the Integrity of Protective Coatings on High-Temperature Alloys
Protective coatings extend the range of applications for materials. Surface properties can be selectively adapted for each problem. Thus bare high-temperature alloys for heat exchanging units used e.g. in high-temperature systems for producing substitute natural gas do not have sufficient protection against undesirable tritium permeation from the helium primary gas into the substitute natural gas generated. A chromium oxide coating, on the other hand, of only a few µm in thickness ensures a barrier effect combined with an inhibitive factor H = 10001.
KeywordsAcoustic Emission Protective Coating Hydrogen Permeation Permeation Measurement Permeation Barrier
Unable to display preview. Download preview PDF.
- 1.H. P. Buchkremer et al., Advances in the Development and Description of Tritium Permeation Barriers, in: High-Temperature Alloys, Nucl. Techn. 66, Sept. 1984.Google Scholar
- 3.H. Jonas and J. A. Golczewski, J. Nucl. Mater. 120 (1984).Google Scholar
- 4.D. R. Holmes and R. T. Pascoe, Werkstoffe und Korrosion 23 (1972).Google Scholar
- 7.R. Benz, IRW, KFA Jülich, personal communication.Google Scholar