G - Physics – 01 – B
Patent
G - Physics
01
B
150/26, 150/4
G01B 13/22 (2006.01) G01N 21/91 (2006.01)
Patent
CA 1173731
ABSTRACT A method and composition for non-destructive testing using the dye penetrant technique, and adapting the use of this technique at high temperatures. The invention is involved with using a marking crayon which includes a carrier composed of a solid which melts at a temperature below the temperature at which the workpiece is to be inspected and a visible or fluorescent dye. Upon application of the crayon to a hot workpiece, the solid penetrant composition becomes molten and the visible or fluorescent dye penetrates into any flaws in the surface in the usual manner. A remover, also consisting of a crayon composition, is used to remove excess penetrant, leaving only penetrant entrapped in the flaws. Upon removal of the excess penetrant and remover, the entrapped penetrant deposits are drawn to surface by the applica- tion of a finely divided developer either in dry form or as an aerosol. Inspection of the piece is then carried out under visible or ultraviolet light, depending upon the nature of the penetrant.
382074
Magnaflux Corporation
Smart & Biggar
LandOfFree
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