Accession Number : ADA251359

Title :   Ultra-Sensitive Magnetic Measurement System to Evaluate Corrosion.

Descriptive Note : Final rept. Jun 89-Dec 91,

Corporate Author : QUANTUM MAGNETICS INC SAN DIEGO CA

Personal Author(s) : Hibbs, Andrew D. ; Altshuler, T.

Report Date : 20 MAR 1992

Pagination or Media Count : 93

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.

Descriptors :   *CORROSION, *MEASUREMENT, *MICROCOMPUTERS, *NONDESTRUCTIVE TESTING, ACQUISITION, ARRAYS, COILS, CONTRACTS, DATA ACQUISITION, FUNCTIONS, INTERFERENCE, RESOLUTION, ROOM TEMPERATURE, TEMPERATURE, TRANSLATIONS.

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE