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US4000422A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of luminescence detection of surface discontinuities

Assignee: Individual
•
Filing: 1974-02-13
•
Granted: 1976-12-28
•
Expires: 1994-02-13
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Abstract

Abstract A method for detection of surface discontinuities by luminescence which consists in the successive treatment of the surfaces of materials subject to testing and inspection with the following compositions of a penetrant, cleaning fluid and a developer, whereupon they are inspected under an ultraviolet light at wavelength of 340-420 nm. Liquid constituents are in volume percent. ______________________________________ a) penetrant ditolylmethane 45-55 lower aliphatic alcohol 35-45 surface-active substance of non-ionogenic type 8-12 1,8-naphthoylene-1',2'-benzimidazole 7-9 gr/l or a composition: high-molecular aromatic hydrocarbons with 15-20 boiling point of about 700° C paraffin hydrocarbons with boiling point of 120-240° C 80-85 b) Cleaning Fluid lower aliphatic alcohol 70-90 surface-active substance of non-ionogenic type 10-30 c) developer acetone 35-45 white enamel based on collodion cotton 25-35 collodion 25-35 or a composition: bentonite clay in Na-form 37-41 lower aliphatic alcohol 20-24 water 37-41 kaolin 56-60 gr/l surface-active substance of non-ionogenic type 3.4-3.7 gr/l sodium nitrite 2.4-2.8 gr/l ______________________________________ The invention enables the revealing of surface discontinuities with a minimum width of 1-4 μm and provides adequate contrast and reliability in flow detection.

Inventors

  • 👤 Nadezhda Vasilievna Kuzmina
  • 👤 Ljudmila Ivanovna Vanina
  • 👤 Nadezhda Vasilievna Vdovenko
  • 👤 Leonid Davidovich Melikadze
  • 👤 Leonid Yakovlevich Malkes
  • 👤 Nikolai Grigorievich Vasiliev
  • 👤 Alexandr Sergeevich Borovikov

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 21:59
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/06; G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91; Y; Y10; Y10S; Y10S252/00; Y10S252/96

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 107 words
A method of detecting surface discontinuities in materials, which are preferably metallic, with luminescence comprising treating the surface of said materials successively with a set of a penetrant, cleaning fluid and a developer and inspecting the treated surface under an ultraviolet light, said set having the following composition of penetrant, cleaning fluid and developer, the liquid constituents being in volume percent: ______________________________________ a) Penetrant ditolylmethane 45-55 lower aliphatic alcohol 35-45 surface-active substance of non- ionogenic type 8-12 1,8-naphthoylene-1',2'-benzimidazole 7-9[gr/l]g/l b) Cleaning fluid lower aliphatic alcohol 70-90 surface-active substance of non- ionogenic type 10-30 c) Developer acetone 35-45 white enamel based on collodion cotton 25-35 collodion 25-35 ______________________________________
Claim 2
Independent Claim 107 words
A method of detecting surface discontinuities in materials, which are preferably metallic, with luminescence comprising treating the surface of said materials successively with a set of a penetrant, cleaning fluid and a developer and inspecting the treated surface under an ultraviolet light, said set having the following composition of penetrant, cleaning fluid and developer, the liquid constituents being in volume percent: ______________________________________ a) Penetrant ditolylmethane 45-55 lower aliphatic alcohol 35-45 surface-active substance of non- ionogenic type 8-12 1,8-naphthoylene-1',2'-benzimidazole 7-9[gr/l]g/l b) Cleaning fluid lower aliphatic alcohol 70-90 surface-active substance of non- ionogenic type 10-30 c) Developer acetone 35-45 white enamel based on collodion cotton 25-35 collodion 25-35 ______________________________________
Claim 3
Independent Claim 126 words
A method of detecting surface discontinuities in materials, which are preferably metallic, with luminescence comprising treating the surface of said materials successively with a set of a penetrant, cleaning fluid and a developer and inspecting the treated surface under an ultraviolet light, said set having the following composition of penetrant, cleaning fluid and developer, the liquid constituents being in volume percent: ______________________________________ a) Penetrant high-molecular aromatic hydrocarbons with boiling points of about 700° C 15-20 paraffin hydrocarbons with boiling point of 120-240° C 80-85 b) Cleaning fluid lower aliphatic alcohol 70-90 surface-active substance of non- ionogenic type 10-30 c) Developer bentonite clay in Na-form 37-41 lower aliphatic alcohol 20-24 water 37-41 kaolin 56-60 g/l surface-active substance of non-ionogenic type 3.4-3.7 g/l sodium nitrite 2.4-2.8 g/l. ______________________________________
Claim 4
Independent Claim 126 words
A method of detecting surface discontinuities in materials, which are preferably metallic, with luminescence comprising treating the surface of said materials successively with a set of a penetrant, cleaning fluid and a developer and inspecting the treated surface under an ultraviolet light, said set having the following composition of penetrant, cleaning fluid and developer, the liquid constituents being in volume percent: ______________________________________ a) Penetrant high-molecular aromatic hydrocarbons with boiling points of about 700° C 15-20 paraffin hydrocarbons with boiling point of 120-240° C 80-85 b) Cleaning fluid lower aliphatic alcohol 70-90 surface-active substance of non- ionogenic type 10-30 c) Developer bentonite clay in Na-form 37-41 lower aliphatic alcohol 20-24 water 37-41 kaolin 56-60 g/l surface-active substance of non-ionogenic type 3.4-3.7 g/l sodium nitrite 2.4-2.8 g/l. ______________________________________
Claim 5
Independent Claim 123 words
A method of detecting surface discontinuities in materials, which are preferably metallic, with luminescence comprising treating the surface of said materials successively with a set of a penetrant, cleaning fluid and a developer and inspecting the treated surface under an untraviolet light, said set having the following compositions of penetrant, cleaing fluid and developer, the liquid constituents being in volume percent: ______________________________________ a) Penetrant ditolylmethane 45-55 lower aliphatic alcohol 35-45 surface-active substance of non- ionogenic type 8-12 1,8-naphthoylene-1', 2'-benzimidazole 7-9 g/l b) Cleaning fluid lower aliphatic alcohol 70-90 surface-active substance of non-ionogenic type 10-30 c) Developer bentonite clay in Na-form 37-41 lower aliphatic alcohol 20-24 water 37-41 kaolin 56-60 g/l surface-active substance of non- ionogenic type 3.4-3.7 g/l sodium nitrite 2.4-2.8 g/l. ______________________________________
Claim 6
Independent Claim 123 words
A method of detecting surface discontinuities in materials, which are preferably metallic, with luminescence comprising treating the surface of said materials successively with a set of a penetrant, cleaning fluid and a developer and inspecting the treated surface under an untraviolet light, said set having the following compositions of penetrant, cleaing fluid and developer, the liquid constituents being in volume percent: ______________________________________ a) Penetrant ditolylmethane 45-55 lower aliphatic alcohol 35-45 surface-active substance of non- ionogenic type 8-12 1,8-naphthoylene-1', 2'-benzimidazole 7-9 g/l b) Cleaning fluid lower aliphatic alcohol 70-90 surface-active substance of non-ionogenic type 10-30 c) Developer bentonite clay in Na-form 37-41 lower aliphatic alcohol 20-24 water 37-41 kaolin 56-60 g/l surface-active substance of non- ionogenic type 3.4-3.7 g/l sodium nitrite 2.4-2.8 g/l. ______________________________________
Claim 7
Dependent Claim 67 words
A method according to claim 1, wherein the set of penetrant, cleaning fluid and developer have the following composition: ______________________________________ a) Penetrant ditolylmethane 50 lower aliphatic alcohol 40 surface-active substance of non-ionogenic type 10 1,8-naphthoylene-1', 2'-benzimida- zole 8 g/l b) Cleaning fluid lower aliphatic alcohol 80 surface-active substance of non- ionogenic type 20 c) Developer acetone 40 white enamel based on collodion cotton 30 collodion 30. ______________________________________
Claim 8
Dependent Claim 85 words
A method according to claim 2, wherein the set of penetrant, cleaning fluid and developer have the following composition: ______________________________________ a) Penetrant high-molecular aromatic hydrocarbons with boiling point of about 700° C 15 paraffin hydrocarbons with boiling point of 120-24° C 85 b) Cleaning fluid lower aliphatic alcohol 80 surface-active substance of non-iono- genic type 20 c) Developer bentonite clay in Na-form 39 lower aliphatic alcohol 22 water 39 kaolin 58 g/l surface-active substance of non-iono- genic type 3.5 g/l sodium nitrite 2.6 g/l. ______________________________________
Claim 9
Dependent Claim 83 words
A method according to claim 3, wherein the set of penetrant, cleaning fluid and developer have the following composition: ______________________________________ a) Penetrant ditolylmethane 50 lower aliphatic alcohol 40 surface-active substance of non-ionogenic type 10 1,8-naphthoylene-1', 2'-benzimidazole 8 g/l b) Cleaning fluid lower aliphatic alcohol 80 surface-active substance of non-ionogenic type 20 c) Developer bentonite clay in Na-form 39 (3.5% aqueous suspension) lower aliphatic alcohol 22 water 39 kaolin 58 g/l surface-active substance of non-iono- genic type 3.5 g/l sodium nitrite 2.6 g/l. ______________________________________

References Cited (Backward Citations)

SU137294A1 Cited
US2806959A Cited
US3279243A Cited
US3751970A Cited
US3560399A Cited
US3561262A Cited
SU362860A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-12-28 1980-06-28 1980-12-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-12-28 1984-06-28 1984-12-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-12-28 1988-06-28 1988-12-28 $7700.00 Window Closed / Lapsed

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