Dual-purpose penetrant system

Details Dual-purpose penetrant system Dual-purpose penetrant system

1980-04-07

1982-05-25

Woodiel, Donald O.

Measuring and testing

Surface and cutting edge testing

G01B 1130

Patent

active

043310273

ABSTRACT:
Method and composition for detecting flaws in a workpiece utilizing either white light or ultraviolet light wherein a penetrant solution is applied to the surface of the workpiece, the penetrant solution containing a rhodamine dye dissolved in a solvent, the dye possessing an inherent color and being capable of fluorescing under the influence of ultraviolet light. The excess penetrant is removed from the surface in accordance with usual practice, while leaving penetrant entrapped in any surface flaws. An improved developer is applied to the surface, the developer consisting of a suspension including a finely divided developer powder suspended in the same dye solvent as in the penetrant in a sufficient amount to lower the concentration of rhodamine dye in the entrapped penetrant below that at which quenching of fluorescence occurs. The indications thus produced under both visible light and ultraviolet light are distinct and non-blurring, enabling the piece to be inspected under either type of light source.

REFERENCES:
patent: 3028338 (1962-04-01), Parker et al.
patent: 3557015 (1971-01-01), Alburger

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