发明名称 |
Method and apparatus for detecting corrosion under non-ferromagnetic coatings |
摘要 |
A method using nuclear magnetic resonance techniques to detect corrosion within metallic structures such as aluminum under non-ferromagnetic coatings without first having to remove the coatings. The metallic structure is placed within an external static magnetic field. A series of radio frequency preparation and inspection pulses is applied to the metallic with the preparation pulses, and for generating a series of nuclear magnetic resonance response signals with the inspection pulses. The response signals are detected and the amplitudes of the response signals are compared with the spin-spin relaxation time of corrosion for detecting the presence of corrosion in the structure. |
申请公布号 |
AU4075297(A) |
申请公布日期 |
1998.03.06 |
申请号 |
AU19970040752 |
申请日期 |
1997.08.19 |
申请人 |
MCDONNELL DOUGLAS CORPORATION;WASHINGTON UNIVERSITY |
发明人 |
DAVID M. SYNDERMAN;DONALD D. PALMER JR.;MARK S. CONRADI;DANIEL J. LEOPOLD;CHARLES G. FRY |
分类号 |
G01R33/46 |
主分类号 |
G01R33/46 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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