Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1982-03-08
1983-03-01
Powell, William A.
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
156645, 156656, 156664, 25230119, C23F 102, B44C 122, C03C 1500, C03C 2506
Patent
active
043753841
ABSTRACT:
A method for detecting cracks and surface discontinuities in an object which comprises applying to the surface of an object having a ground surface and smeared metal, an etchant penetrant solution capable of removing said smeared metal covering the openings of said cracks, cleaning said surface to remove said excess penetrant solution, and applying to said surface a developer coating containing a fluorescent material, the etchant remaining in the cracks being capable of destroying the fluorescence adjacent the cracks, and viewing the surface under ultraviolet light to reveal indications of cracks showing intensely black against a fluorescent background.
REFERENCES:
patent: 2635329 (1953-04-01), Forest et al.
patent: 2740700 (1956-04-01), Fuller
patent: 3171768 (1965-03-01), Levengood
Geldin Max
Powell William A.
Rockwell International Corporation
Silberberg Charles T.
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