ISSN:
1013-9826
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
Flow Accelerated Corrosion (FAC) has become a hot issue because of aging of passivecomponents. Ultrasonic Technique (UT) has been adopted to inspect the secondary piping. UT,however, covers only narrow region, which results in numerous detecting points and thus takestime. In this paper, we suggested a Wide Range Monitoring (WiRM) concept with EquipotentSwitching Direct Current Potential Drop (S-DCPD) method to monitor the thickness of piping.Since the DCPD method covers area, not a point, it needs less monitoring points. We use the SDCPDmethod to screen the candidate area to monitor. Based on the monitoring results, we candetermine the inspection area. To improve the applicability to the piping system, we suggested theEquipotent concept, which eliminates the leakage current. Finite element analysis results anddeveloped resistance model are presented for the simple analysis to describe the wall thinning byDCPD signals. And also validation test results are presented, from which we can identify theconsistency of the model and the experiment
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.345-346.1331.pdf
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