Magnetic particle inspection process useable with simultaneous i

Details Magnetic particle inspection process useable with simultaneous i Magnetic particle inspection process useable with simultaneous i

1979-11-14

1982-07-27

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

By paramagnetic particles

324216, G01R 3300, G01N 2784

Patent

active

043419976

ABSTRACT:
A method and composition for non-destructive testing of a magnetizable workpiece in which the surface of the workpiece is coated with a composition containing discrete magnetic particles consisting of a ferromagnetic particle core, fluorescent pigment particles attached to said core and a cascading opacifier combined therewith, preferably by means of a film-forming encapsulating resin. The particles of the daylight fluorescent pigment are sufficiently large so that they fluoresce with sufficient intensity to be seen in normal lighting conditions. Consequently, the magnetizable pieces to be inspected can be simultaneously inspected under ultra-violet and white light excitation to reveal both fine cracks and large voids.

REFERENCES:
patent: 3402349 (1968-09-01), Parker
patent: 3485758 (1969-12-01), Borucki et al.
patent: 3609532 (1971-09-01), Van Kirk et al.

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