EP0163679A1 - Procede pour l'examen non destructif de defauts de surface - Google Patents

Procede pour l'examen non destructif de defauts de surface

Info

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Withdrawn
Application number
EP84904130A
Other languages
German (de)
English (en)
Inventor
David John Hutchings
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.)
Chemetall Ltd
Original Assignee
Brent Chemicals International PLC
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 Brent Chemicals International PLC filed Critical Brent Chemicals International PLC
Publication of EP0163679A1 publication Critical patent/EP0163679A1/fr
Withdrawn legal-status Critical Current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

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)
  • Paper (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

Dans un procédé pour l'examen non destructif de défauts de surface, on applique sur la surface une solution avec un ou plusieurs colorants qui n'émettent aucun rayonnement sous l'effet de la lumière ultra-violette. La solution superflue après pénétration de celle-ci dans les défauts de surface est essuyée et la surface est recouverte d'une couche de révélateur sensible à la lumière du jour qui contient en poids 0,02 à 2,0% en poids de un ou plusieurs agents éclaircissants. La couche de revêtement absorbe les couleurs demeurées dans les défauts de surface, et ces défauts apparaissent sous forme de traces noires sous l'effet de la lumière ultra-violette.
EP84904130A 1983-11-26 1984-11-16 Procede pour l'examen non destructif de defauts de surface Withdrawn EP0163679A1 (fr)

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 (fr) 1985-12-11

Family

ID=6215359

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84904130A Withdrawn EP0163679A1 (fr) 1983-11-26 1984-11-16 Procede pour l'examen non destructif de defauts de surface

Country Status (11)

Country Link
US (1) US4641518A (fr)
EP (1) EP0163679A1 (fr)
JP (1) JPS61500507A (fr)
BR (1) BR8407191A (fr)
DE (1) DE3342855A1 (fr)
DK (1) DK324485D0 (fr)
ES (1) ES8702655A1 (fr)
FI (1) FI83912C (fr)
IT (1) IT1177320B (fr)
NO (1) NO852919L (fr)
WO (1) WO1985002464A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
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
US6737645B2 (en) 2002-08-30 2004-05-18 Tropicana Products, Inc. Method for qualifying bottle rinser
US7105350B2 (en) 2002-08-30 2006-09-12 Tropicana Products, Inc. Closure integrity test method for hot-fill bottling operation
EP1610122A1 (fr) 2004-06-01 2005-12-28 Siemens Aktiengesellschaft Procédé et dispositif pour la détermination des défauts des aubes de turbine par un transducteur acoustique à élements en phase
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)

* Cited by examiner, † Cited by third party
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8502464A1 *

Also Published As

Publication number Publication date
WO1985002464A1 (fr) 1985-06-06
DE3342855C2 (fr) 1989-02-09
DK324485A (da) 1985-07-17
JPS61500507A (ja) 1986-03-20
FI83912B (fi) 1991-05-31
DE3342855A1 (de) 1985-06-05
DK324485D0 (da) 1985-07-17
BR8407191A (pt) 1985-11-05
ES8702655A1 (es) 1987-01-01
FI83912C (fi) 1991-09-10
IT1177320B (it) 1987-08-26
FI852799A0 (fi) 1985-07-17
NO852919L (no) 1985-07-23
IT8423732A0 (it) 1984-11-26
ES537861A0 (es) 1987-01-01
US4641518A (en) 1987-02-10
FI852799L (fi) 1985-07-17

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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