Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1987-12-17
1989-06-27
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324 712, 324229, G01N 2782, G01R 3312, G01B 710
Patent
active
048433195
ABSTRACT:
There is disclosed a method for detecting corrosion on the walls of conductive containers wherein a transmitting antenna induces a current into a portion of the container wall and the decay of the induced current is detected by a receiving antenna, with a record of the decay of the induced current being created. The record is interpreted to determine the thickness of the container wall portion and the presence or absence of corrosion is inferred. The effects of variations in distance between the transmitting antenna and the receiving antenna and the pipe wall at one location on the pipe and between the transmitting antenna and the receiving antenna and the pipe wall at another location on the record of the decay are corrected for by examining the rate of decay of the induced current.
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Atlantic Richfield Company
Fails James C.
Mantooth Geoffrey A.
Strecker Gerard R.
Zobal Arthur F.
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