EP0163679A1 - Verfahren zur zerstörungsfreien prüfung von oberflächendefekten - Google Patents
Verfahren zur zerstörungsfreien prüfung von oberflächendefektenInfo
- Publication number
- EP0163679A1 EP0163679A1 EP84904130A EP84904130A EP0163679A1 EP 0163679 A1 EP0163679 A1 EP 0163679A1 EP 84904130 A EP84904130 A EP 84904130A EP 84904130 A EP84904130 A EP 84904130A EP 0163679 A1 EP0163679 A1 EP 0163679A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- surface defects
- light
- developer
- dye
- weight
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000007547 defect Effects 0.000 title claims abstract description 24
- 230000001066 destructive effect Effects 0.000 title abstract 2
- 238000012360 testing method Methods 0.000 title description 2
- 239000000975 dye Substances 0.000 claims abstract description 21
- 230000035515 penetration Effects 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 18
- 230000003287 optical effect Effects 0.000 claims description 14
- 230000002745 absorbent Effects 0.000 claims description 8
- 239000002250 absorbent Substances 0.000 claims description 8
- 238000009659 non-destructive testing Methods 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- 239000000454 talc Substances 0.000 claims description 5
- 229910052623 talc Inorganic materials 0.000 claims description 5
- 239000000080 wetting agent Substances 0.000 claims description 3
- 101100240595 Mus musculus Nipal4 gene Proteins 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 2
- 239000011247 coating layer Substances 0.000 abstract 1
- 239000003086 colorant Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
- 239000007850 fluorescent dye Substances 0.000 description 3
- JVTSHOJDBRTPHD-UHFFFAOYSA-N 2,2,2-trifluoroacetaldehyde Chemical compound FC(F)(F)C=O JVTSHOJDBRTPHD-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 240000001913 Atriplex hortensis Species 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000001044 red dye Substances 0.000 description 1
- 239000003784 tall oil Substances 0.000 description 1
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
Definitions
- the invention relates to a method for non-destructive testing of surface defects by first forming a solution with one or more dyes that substantially no type emission r under UV light, show applied and excess solution of dye penetration is removed in the surface defects and then the surface with a developer leaving an absorbent coating is covered, which contains at least one fluorescent component, the surface defects under UV light appearing as blackening within the. I show you the surrounding area.
- red and white method For the non-destructive testing or detection of surface defects, especially on metallic workpieces, the so-called red and white method is often used, which consists in applying a solution with a dye that contrasts strongly in daylight to the surface, so that the solution and the dye penetrate into the surface defects can. The excess solution is then removed from the surface residues so that it no longer has any dye. Then a
- Coating applied which leaves a background contrasting to the dye.
- This is, for example, a solvent with dispersed talc. After the coating has dried, any surface defects become apparent through the coloring of the absorbent talc with the dye remaining in the surface defects.
- the known developer is said to contain, as an essential constituent, Fluoral 7 GA (product of General Aniline and Film Corporation Vnit in a proportion of approximately 1.5%. Furthermore, it is proposed, in addition to this fluorescent dye, also an optical brightener with a proportion of 3.2 % to admit. Fluoral 7 GA and similar fluorescent dyes give the coating a striking yellow color, which affects the contrast in daylight.
- the invention has for its object to enable better contrasting within the coating.
- this object is achieved in that only one or more optical brighteners with a proportion of between 0.02 and 2.0% by weight of the total weight of the developer are used as the fluorescent component.
- the coating is suitable both for the red and white Process, as well as for the UV process provides a high-contrast background, so that surface defects can be clearly identified in daylight by means of the red discoloration and in UV light by means of the blackening.
- the fluorescent dyes are relatively expensive, while the optical brighteners are used on an industrial scale in the context of detergents and bleaches and are therefore very inexpensive to obtain.
- the invention not only provides an agent with improved use properties and thus a more precise test method, but the developer can also be produced more cost-effectively.
- the optical brightener is added to the developer in a proportion of 0.05 to 0.5% by weight. This version shows in particular how small the addition of optical brightener can be without having to accept the accuracy of the test procedure
- the developer consists of
- optical brighteners can be considered for the process according to the invention. These optical afhellers absorb long-wave UV light in the range from 350 to 390 nm and emit light in the visible range between 420 to 500 nm. 7-Diethylam ⁇ no - 4 - methyl-coumarin can be used as a specific example.
- the method according to the invention can be used not only for the primary inspection of surfaces, but also as a inspection method for the known methods described above (bot-white or UV method).
- a solution is first applied with one or more dyes which show essentially no light emission under UV light, excess solution is removed after the dye has penetrated into the surfaces, and then an absorbent coating which contrasts under daylight is removed applied, whereupon the areas of the coating colored by the dye are determined under daylight or UV light.
- an absorbent coating which contrasts under daylight is removed applied, whereupon the areas of the coating colored by the dye are determined under daylight or UV light.
- Isopropanol for example, is suitable as a solvent for the developer constructed according to the invention. Also 1.1. -Trichloroethane and mixtures of solvents have been used successfully. Ethoduomeen T 13 (product and trademark of Akzo), which is based on tall oil, has proven itself as a wetting agent. Not only talc can be used as an absorbent and contrasting component of the coating, but also other inert powders, such as amorphous silicon oxide or magnesium carbonate, which have led to good results.
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)
- Application Of Or Painting With Fluid Materials (AREA)
- Paper (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3342855 | 1983-11-26 | ||
| DE19833342855 DE3342855A1 (de) | 1983-11-26 | 1983-11-26 | Verfahren zur zerstoerungsfreien pruefung von oberflaechendefekten |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0163679A1 true EP0163679A1 (de) | 1985-12-11 |
Family
ID=6215359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP84904130A Withdrawn EP0163679A1 (de) | 1983-11-26 | 1984-11-16 | Verfahren zur zerstörungsfreien prüfung von oberflächendefekten |
Country Status (11)
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5389302A (en) * | 1993-10-04 | 1995-02-14 | Rockwell International Corporation | Chemiluminescent dye penetrant process and composition |
| DE19504532A1 (de) * | 1995-02-11 | 1996-08-14 | Abb Management Ag | Verfahren zur Herstellung eines Isolators |
| US6170320B1 (en) * | 1997-01-24 | 2001-01-09 | Mainstream Engineering Corporation | Method of introducing an additive into a fluid system, especially useful for leak detection, as well as an apparatus for leak detection and a composition useful for leak detection |
| US6327897B1 (en) | 1997-01-24 | 2001-12-11 | Mainstream Engineering Corporation | Method of introducing an in situant into a vapor compression system, especially useful for leak detection, as well as an apparatus for leak detection and a composition useful for leak detection |
| FR2782165B1 (fr) * | 1998-08-05 | 2000-12-29 | Pierre Marie Pailliotet | Procede et dispositif pour le controle non destructif de l'etat d'une surface au moyen d'un produit colorant |
| US7160326B2 (en) * | 2002-06-27 | 2007-01-09 | Depuy Products, Inc. | Method and apparatus for implantation of soft tissue implant |
| US7105350B2 (en) | 2002-08-30 | 2006-09-12 | Tropicana Products, Inc. | Closure integrity test method for hot-fill bottling operation |
| US6737645B2 (en) | 2002-08-30 | 2004-05-18 | Tropicana Products, Inc. | Method for qualifying bottle rinser |
| EP1610122A1 (de) | 2004-06-01 | 2005-12-28 | Siemens Aktiengesellschaft | Verfahren und Vorrichtung zur Ermittlung von Defekten in einer Turbinenschaufel mittels eines Ultraschall-Gruppenstrahlers |
| DE102012200767B4 (de) * | 2012-01-19 | 2014-11-13 | MTU Aero Engines AG | Verfahren zur zerstörungsfreien Prüfung von Werkstückoberflächen |
| DE102013213369B3 (de) * | 2013-07-09 | 2014-10-23 | MTU Aero Engines AG | Verfahren zur zerstörungsfreien Prüfung von Werkstückoberflächen |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3108187A (en) * | 1960-08-02 | 1963-10-22 | Purex Corp Ltd | Flaw detection method using fluorescent penetrant and a fluorescent developer |
| US3279243A (en) * | 1963-01-23 | 1966-10-18 | North American Aviation Inc | Inspection method |
| US3560399A (en) * | 1965-10-24 | 1971-02-02 | Day Glo Color Corp | Activated developer and method of flaw detection |
| US3506827A (en) * | 1968-01-22 | 1970-04-14 | James R Alburger | Method of masking fluorescence in fluorescent dye tracer inspection process materials |
| US3564249A (en) * | 1969-02-24 | 1971-02-16 | North American Rockwell | Reverse penetrant method and means |
| US3557015A (en) * | 1969-05-14 | 1971-01-19 | James R Alburger | Dual-sensitivity dyed liquid tracers |
| US3679598A (en) * | 1970-09-14 | 1972-07-25 | James R Alburger | Inspection penetrant process and compositions employing mixtures of fluorescent indicator dye and non-fluorescent ultraviolet absorber dye |
| US3928046A (en) * | 1974-01-17 | 1975-12-23 | James R Alburger | Brightener additive for inspection penetrant developers |
| US4377492A (en) * | 1980-09-08 | 1983-03-22 | Purex Corporation | Post emulsifiable fluorescent penetrant |
-
1983
- 1983-11-26 DE DE19833342855 patent/DE3342855A1/de active Granted
-
1984
- 1984-11-16 JP JP59504217A patent/JPS61500507A/ja active Pending
- 1984-11-16 BR BR8407191A patent/BR8407191A/pt unknown
- 1984-11-16 EP EP84904130A patent/EP0163679A1/de not_active Withdrawn
- 1984-11-16 US US06/762,065 patent/US4641518A/en not_active Expired - Fee Related
- 1984-11-16 WO PCT/EP1984/000362 patent/WO1985002464A1/de active IP Right Grant
- 1984-11-22 ES ES537861A patent/ES8702655A1/es not_active Expired
- 1984-11-26 IT IT23732/84A patent/IT1177320B/it active
-
1985
- 1985-07-17 DK DK324485A patent/DK324485D0/da not_active Application Discontinuation
- 1985-07-17 FI FI852799A patent/FI83912C/fi not_active IP Right Cessation
- 1985-07-23 NO NO852919A patent/NO852919L/no unknown
Non-Patent Citations (1)
| Title |
|---|
| See references of WO8502464A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FI83912C (fi) | 1991-09-10 |
| DK324485A (da) | 1985-07-17 |
| JPS61500507A (ja) | 1986-03-20 |
| ES8702655A1 (es) | 1987-01-01 |
| DK324485D0 (da) | 1985-07-17 |
| ES537861A0 (es) | 1987-01-01 |
| DE3342855C2 (enrdf_load_stackoverflow) | 1989-02-09 |
| FI852799L (fi) | 1985-07-17 |
| FI852799A0 (fi) | 1985-07-17 |
| WO1985002464A1 (en) | 1985-06-06 |
| IT8423732A0 (it) | 1984-11-26 |
| IT1177320B (it) | 1987-08-26 |
| DE3342855A1 (de) | 1985-06-05 |
| BR8407191A (pt) | 1985-11-05 |
| FI83912B (fi) | 1991-05-31 |
| US4641518A (en) | 1987-02-10 |
| NO852919L (no) | 1985-07-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB LI NL SE |
|
| 17P | Request for examination filed |
Effective date: 19850926 |
|
| 17Q | First examination report despatched |
Effective date: 19870108 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19870602 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: HUTCHINGS, DAVID, JOHN |