Ultra-Sensitive Magnetic Measurement System to Evaluate Corrosion.
Abstract
An ultrasensitive magnetic imaging system with high spatial resolution has been developed for the study of electrochemical corrosion. The system is based on an array of five superconducting quantum interference devices (SQUIDs) with their pickup coils located within 1 mm of the room temperature sample. The sample is mounted on a three axis nonmagnetic translation table and may be scanned past the SQUID array in either vertical or horizontal planes. Instrument functions and data acquisition are controlled and coordinated by a microcomputer. Several new phenomena were observed during the preliminary experiments performed under this contract and these are reported. The instrument also shows great promise for use in other areas of nondestructive testing. SQUID, CORROSION, MAGNETIC MEASUREMENTS, CORROSION CURRENTS.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 20, 1992
- Accession Number
- ADA251359
Entities
People
- Andrew D. Hibbs
- T. Altshuler