GB795456A - Fluorescent penetrant inspection materials and methods - Google Patents

Fluorescent penetrant inspection materials and methods

Info

Publication number
GB795456A
GB795456A GB3?438/55A GB3343855A GB795456A GB 795456 A GB795456 A GB 795456A GB 3343855 A GB3343855 A GB 3343855A GB 795456 A GB795456 A GB 795456A
Authority
GB
United Kingdom
Prior art keywords
dyes
emulsifying
penetrants
penetrant
fluorescent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3?438/55A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Switzer Brothers Inc
Original Assignee
Switzer Brothers Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Switzer Brothers Inc filed Critical Switzer Brothers Inc
Publication of GB795456A publication Critical patent/GB795456A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/91—Investigating the presence of flaws or contamination using penetration of dyes, e.g. fluorescent ink

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

795,456. Flaw detecting. SWITZER BROS., Inc. Dec. 9, 1955 [Sept. 21, 1955], No. 35438/55. Class 106 (2). [Also in Group XL (a)] A penetrant composition for locating flaws in test bodies comprises a flaw penetrating water-immiscible liquid vehicle and a plurality of fluorescent dyes one of which has an emission peak in the visible light range and one or more of the others has an emission peak or peaks lying in the range of maximum absorption of light of the first dyes. The second dye or other dyes should be substantially non-absorptive and reflective in the emission ranges of the first dye or other dyes. This cascading relationship is obtained with such dyes as Rhodamines and Cumarins, specific examples being 4 N, butylamino 1, 8 naphthal N-butylimide, 4 methyl-7 diethyl amino-cumarin, Rhodamine base or extra and Rhodamine 6 GDN: in twin or triplet relationship. In self-emulsifying penetrants the vehicle may be kerosene and sorbitan oleates; in post emulsifying penetrants, dibutyl phthalate and xylol. The fluorescent penetrants are applied to the test bodies by coating or immersion, the bodies being wiped and the cracks viewed by light rich in ultra violet, but deficient in green and longer wavelengths. The liquid may include an agent rendering the penetrant self-emulsifying so that it can be removed from the test body by washing; or an emulsifying agent is applied after the penetrant so that it penetrates to the depth of the filament allows the excess to be washed from the test body. The methods are applicable to flaws in metal, plastic, glass and porcelain. Specifications 642,402, [Group XL (a)], and 763,885 are referred to.
GB3?438/55A 1954-09-21 1955-12-09 Fluorescent penetrant inspection materials and methods Expired GB795456A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US795456XA 1954-09-21 1954-09-21

Publications (1)

Publication Number Publication Date
GB795456A true GB795456A (en) 1958-05-21

Family

ID=22151230

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3?438/55A Expired GB795456A (en) 1954-09-21 1955-12-09 Fluorescent penetrant inspection materials and methods

Country Status (1)

Country Link
GB (1) GB795456A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999053299A1 (en) * 1998-04-13 1999-10-21 Brasscorp Ltd. Leak detector using fluorescent dyes
US9310315B2 (en) 2007-12-17 2016-04-12 Life Technologies Corporation Methods for detecting defects in inorganic-coated polymer surfaces
CN108864745A (en) * 2018-07-05 2018-11-23 江苏德意高航空智能装备股份有限公司 Safety and environmental protection colorant

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999053299A1 (en) * 1998-04-13 1999-10-21 Brasscorp Ltd. Leak detector using fluorescent dyes
US9310315B2 (en) 2007-12-17 2016-04-12 Life Technologies Corporation Methods for detecting defects in inorganic-coated polymer surfaces
CN108864745A (en) * 2018-07-05 2018-11-23 江苏德意高航空智能装备股份有限公司 Safety and environmental protection colorant

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