MM-Wave Resonant Methods for the Detection of Corrosion. Phase 1.
Abstract
In this program, a class of mm-wave resonant tools known as surface resistance analyzers were evaluated for their ability to detect corrosion and extract information on corrosion products. The study was performed primarily on aluminum alloys exposed to salt fog conditions although a high temperature material sand steel alloys were also measured. The results on detection were uniformly encouraging. Statistically significant deviations in surface resistance were reported prior to visible corrosion products appearing. Incipient stress-related cracks around rivet holes were also detected on length scales of 0.1 mm. Complex permittivity data was extracted for the corrosion products and was used to estimated thicknesses, impurity levels, and composition changes during different exposure conditions. Incipient corrosion was also detected underneath several varieties of paint. The results suggest that this may be a useful measurement tool for the detection and analysis of corrosion in an aircraft maintenance environment. jg
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 10, 1995
- Accession Number
- ADA291315
Entities
People
- J. Martens
- S. Sachtjen