Detection of defects on structures

Details Detection of defects on structures Detection of defects on structures

1986-07-14

1988-07-26

Noland, Tom

Measuring and testing

Surface and cutting edge testing

324215, 324216, 252 6252, 25230119, G01B 520, G01B 728, G01N 2784

Patent

active

047592117

ABSTRACT:
The present invention relates to a method for detecting defects in metal structures and welds, especially under-water structures. The method involves applying to the surface of the suspected area of the defective structure a fast curing, cold cure impression material, curing the impression material into a solid cast and lifting off the cured cast as a three dimensional profile of the defect. The impression material may be used in conjunction with a magnetic ink which forms on the defective surface a cluster of magnetic particles, termed "indication", simulating the defect and this "indication" can be lifted off on a cast of the impression material as previously. The preferred impression material is maleinised polybutadiene.

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"Magnetic Rubber"; Materials Evaluation, /43,/ p. 1051; Aug. 1985; Dynamold, Inc. of Fort Worth, Tex.

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