G - Physics – 01 – N
Patent
G - Physics
01
N
150/26
G01N 31/22 (2006.01) C09K 11/06 (2006.01) G01N 21/91 (2006.01)
Patent
CA 1137398
ABSTRACT A method for non-destructive testing for flaws on the surface of a workpiece which includes the step of applying a penetrant composition including a fluore- scent dye in a liquid vehicle onto the surface to permit the penetrant to become trapped in the flaws and then removing excess penetrant from the surface while leaving penetrant entrapped in such flaws. A remover is then applied to the surface, the remover composition in- cluding a solvent, at least one surface active agent which serves as an emulsifier for the liquid vehicle of entrapped penetrant, and a fluorescent material which is more readily soluble in the liquid vehicle of the penetrant than it is in the solvent. Upon contact of the entrapped penetrant with the remover, the fluore- scent material from the remover is preferentially absorbed in the penetrant vehicle entrapped in the flaws thereby enhancing the fluorescent indication provided by the entrapped penetrant. The indications are developed in the usual way by applying a developer to the surface to draw the entrapped penetrant to the surface of the work- piece where it is contrastingly visible to the surface and is observable by viewing the surface under ultraviolet light.
354597
Magnaflux Corporation
Smart & Biggar
LandOfFree
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