Method and means of accelerating removal of background entrapmen

Details Method and means of accelerating removal of background entrapmen Method and means of accelerating removal of background entrapmen

1974-12-16

1976-01-13

Gill, James J.

Measuring and testing

Surface and cutting edge testing

G01N 1908

Patent

active

039317331

ABSTRACT:
Process and apparatus for inspection penetrant detection of surface flaws in test parts in which the parts are sequentially process by the steps of (1) applying a dyed liquid penetrant to the test parts, (2) stripper-wash removal of surface penetrant, (3) interim-drying of the test parts, (4) finish-wash depletion of surface micro-entrapments of penetrant, aided by an emulsifier where applicable, (5) drying, and (6) inspection for flaw entrapment indications. The novel step of interim drying acts to alter the interaction of the finish-wash with penetrant entrapments, causing an acceleration of wash removal of the flaw entrapments and a more rapid removal of unwanted entrapments in surface porosities and micro-flaws.

REFERENCES:
patent: 2806959 (1957-09-01), Forest et al.
patent: 3814695 (1974-06-01), Molina

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