公开(公告)号：US5905376A

公开(公告)日：1999-05-18

申请号：US699621

申请日：1996-08-19

申请人： David M. Synderman ,  Donald D. Palmer, Jr. ,  Mark S. Conradi ,  Daniel J. Leopold ,  Charles G. Fry

发明人： David M. Synderman ,  Donald D. Palmer, Jr. ,  Mark S. Conradi ,  Daniel J. Leopold ,  Charles G. Fry

IPC分类号： G01R33/46 ,  G01V3/00

CPC分类号： G01R33/4641 ,  G01R33/4625

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.

摘要翻译： 一种使用核磁共振技术检测非铁磁性涂层等金属结构如铝的腐蚀的方法，而无需先除去涂层。 金属结构放置在外部静磁场内。 一系列射频准备和检查脉冲用准备脉冲施加到金属，并用检测脉冲产生一系列核磁共振响应信号。 检测响应信号，并将响应信号的振幅与用于检测结构中腐蚀的存在的腐蚀的自旋 - 自旋弛豫时间进行比较。