Radiant energy – Radiation tracer methods
Patent
1975-07-16
1979-05-01
Dixon, Harold A.
Radiant energy
Radiation tracer methods
252DIG1, 252DIG6, G09K 300
Patent
active
041525922
ABSTRACT:
A water washable substantially biodegradable dye penetrant composition having excellent sensitivity and high stability, for use in non-destructive testing of objects to locate voids and defects therein, said composition consisting essentially of an organic dye, preferably a fluorescent dye, and a carrier or solvent for said dye, in the form of certain ethoxylated linear alcohols, particularly the biodegradable nonionic surfactants comprised of ethoxylates of a mixture of secondary alcohols having linear alkyl chains of from 10 to 17 carbon atoms. In the method of application of the dye penetrant compositions, such composition is applied to the surface of an object containing cracks and flaws, water is applied to the surface of the object to remove excess liquid dye penetrant composition from the surface without removing such penetrant from the cracks and defects, and with or without a developer, the surface of the object is viewed under suitable lighting conditions, e.g., ultraviolet or black light when the dye in the penetrant is a fluorescent dye, to locate any cracks or defects in the surface of the body as indicated by colored traces from the dye penetrant remaining in the cracks and flaws.
REFERENCES:
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patent: 3349041 (1967-10-01), Alburger
patent: 3429826 (1969-02-01), Alburger
patent: 3543570 (1970-12-01), Mlot-Fijalkowski
patent: 3558882 (1971-01-01), Mlot-Fijalkowski
patent: 3716492 (1973-02-01), Graham et al.
patent: 3915886 (1975-10-01), Molina
patent: 3939092 (1976-02-01), Molina
Dixon Harold A.
Humphries L. Lee
Rockwell International Corporation
Silberberg Charles T.
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