Method for non-destructive testing of a magnetizable workpiece u

Details Method for non-destructive testing of a magnetizable workpiece u Method for non-destructive testing of a magnetizable workpiece u

1985-08-01

1987-10-27

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

By paramagnetic particles

324215, 252 6252, G01N 2784, G01R 3312, G01M 2782, H01F 128

Patent

active

047032634

ABSTRACT:
A dry magnetic particle bath for non-destructive testing of a magnetizable workpiece to detect flaws comprising magnetic particles, a modified dextrose adhesive, and a carrier powder. In certain other embodiments of the invention the magnetic particle bath is instead a wet bath comprising water, magnetic particles, and modified dextrose. According to the invention, the wet bath can also contain an anti-freeze component consisting essentially of urea and ethylene glycol, glycerine or monoethanolamine to depress the freezing point of the water bath to 10.degree.-15.degree. F.; the invention encompasses wet bath formulations which contain the anti-freeze component in combination with adhesives other than modified dextrose.

REFERENCES:
patent: 3609532 (1969-07-01), Vankirk et al.
patent: 4113658 (1978-09-01), Geus
patent: 4338566 (1982-07-01), Graham

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