DE747004C - Process for the detection of thin, colorless paint coatings, preferably on metals - Google Patents

Process for the detection of thin, colorless paint coatings, preferably on metals

Info

Publication number
DE747004C
DE747004C DEI71373D DEI0071373D DE747004C DE 747004 C DE747004 C DE 747004C DE I71373 D DEI71373 D DE I71373D DE I0071373 D DEI0071373 D DE I0071373D DE 747004 C DE747004 C DE 747004C
Authority
DE
Germany
Prior art keywords
metals
thin
detection
dye
testing
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
DEI71373D
Other languages
German (de)
Inventor
Gernot Weisshardt
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.)
REVISIONS und TREUHAND AG DEUT
Original Assignee
REVISIONS und TREUHAND AG DEUT
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 REVISIONS und TREUHAND AG DEUT filed Critical REVISIONS und TREUHAND AG DEUT
Priority to DEI71373D priority Critical patent/DE747004C/en
Application granted granted Critical
Publication of DE747004C publication Critical patent/DE747004C/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
    • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
    • G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Biophysics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Paints Or Removers (AREA)

Description

Verfahren zur Feststellung dünner, farbloser Lacküberzüge, vorzugsweise auf Metallen Feinbearbeitete Flächen von Metallen und anderen Werkstoffen werden häufig zum Schutz gegen mechlanische und chemische Angriffe mit einer hauchdünnen, farblosen Lackschicht überzogen, deren Vorhandensein schwer feststellbar ist. Da sich die Weiterverarbeitung solchei Flächen, insbesondere auch die Anwendung von Schmiermitteln in Feinmechanik. Uhrentechnik und Apparatebau, oft- danach richtet, ob solche Lackschic.hten vorhanden sind oder nicht, entstand die Aufgabe, ein zerstörungsfreies, schnell und einwandfrei arbeitendes Verfahren zu entwielçeln, mit welchem das Vorhandensein solcher Schichten festgestellt werden kann.Method for the detection of thin, colorless paint coatings, preferably on metals Finely machined surfaces of metals and other materials often to protect against mechanical and chemical attacks with a wafer-thin, Colorless layer of varnish coated, the presence of which is difficult to determine. There the further processing of such surfaces, in particular the application of Lubricants in precision engineering. Watch technology and apparatus engineering, often based on whether such lacquer layers are present or not, the task arose to create a non-destructive, to develop a fast and flawlessly working process with which the presence such layers can be determined.

Erfindungsgemäß wird als Indikator eine kleine Menge eines in einer auch den Lack lösenden Flüssigkeit gelösten Farbstoffes aufgebracht. Es wird hierbei die Eigenschaft solcher Lackschichten verwendet, sich in gewissen Lösungsmitteln leicht und schnell zu lösen und nach Verdunstenl des Lösungsmittels wieder aufzutrocknen. Dem zur Prüfung angewendeten Lösungsmittel wird der lösbare Farbstoff, welcher nach dem Auftrocknen als Fleck in der Lackschicht zurückbleibt, in echter Lösung oder in Suspension zugesetzt. According to the invention, a small amount of one in one is used as an indicator also applied to the paint dissolving liquid dissolved dye. It will be here the property of such lacquer layers used is in certain solvents easy and quick to dissolve and dry up again after the solvent has evaporated. The solvent used for testing is the soluble dye, which according to remains as a stain in the paint layer after drying, in real solution or added in suspension.

Der Fleck kann nach dem Auftrocknen durch Abreiben nicht entfernt werden, während er auf einer nicht lackierten Fläche leicht abgewischt werden kann. Der Farbstoff wird zweckmäßig in einem von dem zu untersuchenden Metall kräftig kontrastierenden Farbton gewählt.After drying, the stain cannot be removed by rubbing while it can be easily wiped off on an unpainted surface. The dye expediently becomes strong in one of the metal to be examined contrasting shade chosen.

Gemäß einem weiteren Merkmal der Erfindung werden zur Unterscheidung von Lacken verschiedener Art, z. B. solchen, die auf I(unstharz- Jazw. Nitrocellulosegrundlage hergestellt sind, Prüfflüssigkeiten verwendet, welche die zu unterscheidenden Lacke in verschiedenem Maße lösen, beispielsweise den einen leicht und den anderen gar nicht. Gemäß einer weiteren Ausgestaltung dieses Verfahrens werden diesen verschiedenen Lösungsmitteln verschiedene Farbstoffe zugesetzt.According to a further feature of the invention, to distinguish of varnishes of various types, e.g. B. those based on I (unstharz- Jazw. Nitrocellulosegrundlage are produced, test liquids are used, which the varnishes to be distinguished solve to different degrees, for example one easily and the other even not. According to a further embodiment of this method, these are different Various dyes added to solvents.

Claims (4)

P A T E N T A N S P R Ü C H E : 1. Verfahren zur Feststellung dünner. farbloser Lacküberzüge, vorzugsweise auf Metallen, dadurch gekennzeichnet, daß als Indil;ator eine kleine Menge eines in einer auch den Lack lösenden Flüssigkeit gelösten Farbstoffes aufgebracht wird. P A T E N T A N S P R Ü C H E: 1. Method of finding thinner. colorless lacquer coatings, preferably on metals, characterized in that as Indil; ator a small amount of one dissolved in a liquid which also dissolves the lacquer Dye is applied. 2. Verfahren nach Anspruch r, dadurch gekennzeichnet, daß für den Farbindikator ein von der Farbe des Metalls möglichst stark kontrastierender Farbstoff gewählt wird, z. B. Fuchsin oder Methylviolett für Messing. 2. The method according to claim r, characterized in that for the Color indicator a dye that contrasts as strongly as possible with the color of the metal is chosen, e.g. B. Fuchsine or methyl violet for brass. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß zur Prüfung auf das Vorhandensein von Lacken verschiedener Art Lösungsmittel zur Prüfung verwendet werden, welche die in Betracht kommenden Lacke in stark verschiedenem Maße lösen. 3. The method according to claim 1, characterized in that for testing for the presence of varnishes of various types solvent used for testing which dissolve the paints in question to very different degrees. 4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß den verschiedenen Prüflösungen Farbstoffe verschiedener Färbung zugesetzt sind. 4. The method according to claim 3, characterized in that the different Test solutions dyes of different coloration are added. Zur Abgrenzung des Anmeldungsgegenstandes vom Stande der Technik sind im Erteilungsverfahren keine Druckschriften in Betracht gezogen worden. To distinguish the subject of the application from the state of the art no publications were taken into account in the granting procedure.
DEI71373D 1942-01-18 1942-01-18 Process for the detection of thin, colorless paint coatings, preferably on metals Expired DE747004C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI71373D DE747004C (en) 1942-01-18 1942-01-18 Process for the detection of thin, colorless paint coatings, preferably on metals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI71373D DE747004C (en) 1942-01-18 1942-01-18 Process for the detection of thin, colorless paint coatings, preferably on metals

Publications (1)

Publication Number Publication Date
DE747004C true DE747004C (en) 1944-09-01

Family

ID=7197167

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI71373D Expired DE747004C (en) 1942-01-18 1942-01-18 Process for the detection of thin, colorless paint coatings, preferably on metals

Country Status (1)

Country Link
DE (1) DE747004C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3125114A1 (en) * 1981-06-26 1983-01-13 Battelle-Institut E.V., 6000 Frankfurt Method for determining the wear status of machinery components

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3125114A1 (en) * 1981-06-26 1983-01-13 Battelle-Institut E.V., 6000 Frankfurt Method for determining the wear status of machinery components

Similar Documents

Publication Publication Date Title
DE747004C (en) Process for the detection of thin, colorless paint coatings, preferably on metals
DE102017010280B4 (en) Use of an agent for reversible, fleeting matting or whitening of objects that are difficult or impossible to measure optically
DE2635483A1 (en) DYE INGREDIENT SYSTEM
DE10150566B4 (en) Methods for testing plastics
US3279243A (en) Inspection method
DE60120129T2 (en) CLEANING SAY
US2839918A (en) Flaw detection
DE833260C (en) Method for testing an object or part for surface defects
DE102005055028B4 (en) Means and methods for testing corrosion protection coatings
DE643031C (en) Method for displaying pores in protective coatings
US3433062A (en) Inspection method and means
Byrne Wolbers Cleaning Methods: Introduction
DE2804829C2 (en) Process for the determination of imperfections reaching up to the surface of workpieces
GB1593763A (en) Treatment of metal surfaces
DE102004050150A1 (en) Corrosion testing agent for investigating metallic components having a corrosion protection coating for defect sites contains a thickener, an indicator and solvent and is transparent
DE2340573C2 (en) Process for the determination of imperfections reaching up to the surface of workpieces
DE1473546C (en) Process for the creation of documents of the non-destructive testing for surface defects according to the dye potion process
US2081160A (en) Method and material for coating metal
RU2331060C1 (en) Liquid developer for coloured penetrant flaw detection
DE4210585C2 (en) Procedure for evaluating the weathering behavior of paints
Lee et al. Experimental Study on Poultices Applying to Remove Fixative (Paraloid B72) on Earthen Mural Painting
DE596015C (en) Procedure for cleaning painted or painted objects
DE745698C (en) Method for detecting voids or similar defects in castings made of light metal alloys, in particular magnesium alloys
WO2021210975A1 (en) Chromium vi test
DE872275C (en) Procedure for testing metallic castings for leaks and defects