DE681493C - Process for treating oxide layers or layers with photographic images produced therein on light metals - Google Patents
Process for treating oxide layers or layers with photographic images produced therein on light metalsInfo
- Publication number
- DE681493C DE681493C DES129095D DES0129095D DE681493C DE 681493 C DE681493 C DE 681493C DE S129095 D DES129095 D DE S129095D DE S0129095 D DES0129095 D DE S0129095D DE 681493 C DE681493 C DE 681493C
- Authority
- DE
- Germany
- Prior art keywords
- layers
- photographic images
- light metals
- images produced
- oxide layers
- 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
Links
- 229910052751 metal Inorganic materials 0.000 title claims description 10
- 239000002184 metal Substances 0.000 title claims description 10
- 238000000034 method Methods 0.000 title claims description 7
- 150000002739 metals Chemical class 0.000 title claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 11
- 230000002378 acidificating effect Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- ZMZDMBWJUHKJPS-UHFFFAOYSA-M Thiocyanate anion Chemical compound [S-]C#N ZMZDMBWJUHKJPS-UHFFFAOYSA-M 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 238000005562 fading Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- DHCDFWKWKRSZHF-UHFFFAOYSA-L thiosulfate(2-) Chemical compound [O-]S([S-])(=O)=O DHCDFWKWKRSZHF-UHFFFAOYSA-L 0.000 description 2
- WUGCBSIBTVUHPE-UHFFFAOYSA-J [Co++].[Ni++].CC([O-])=O.CC([O-])=O.CC([O-])=O.CC([O-])=O Chemical class [Co++].[Ni++].CC([O-])=O.CC([O-])=O.CC([O-])=O.CC([O-])=O WUGCBSIBTVUHPE-UHFFFAOYSA-J 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/82—After-treatment
- C23C22/83—Chemical after-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Description
Verfahren zum Behandeln von Oxydschichten bzw. von Schichten mit darin erzeugten photographischen Bildern - auf Leichtmetallen Die auf Leichtmetallen, insbesondere auf Aluminium, auf elektrischem oder chemischem Wege erzeugten oxydhaltigen Schichten sind vielfach für Zwecke des Korrosionsschutzes noch nicht dicht genug. Sie werden. daher in der Praxis häufig mit sog. Nachdichtmitteln behandelt, zu denen u. a. Wasser und die Lösungen von Metallsalzen, z. B. den Acetaten von Kobalt und Nickel, zählen. Die angedeuteten Nachdichtmethoden entsprechen in bezug auf die Verwendung von Wasser nicht allen Anforderungen, die in der Praxis gestellt werden und stellen sich in bezug auf die Verwendung von Metallsalzen verhältnismäßig teuer, wobei sich noch durch den Metallgehalt der zur Nachdichtung benutzten Lösungen die Möglichkeit der Verunreinigung der Oxydschichtergeben kann. Die Wirkung der verwendeten Metallsalze, z. B. der Kobalt-Nickel-Acetate, wird darauf zurückgeführt, daß sie hydrolytisch gespalten werden und das betreffende Metallhydroxyd, z. B. Kobalt- oder Nickelhydroxyd, abscheiden.Process for treating oxide layers or layers with therein produced photographic images - on light metals Those on light metals, in particular on aluminum, by electrical or chemical means containing oxides In many cases, layers are not yet dense enough for the purpose of corrosion protection. You will be. therefore often treated with so-called post-sealing agents in practice, to which i.a. Water and the solutions of metal salts, e.g. B. the acetates of cobalt and Nickel, count. The indicated re-sealing methods correspond with respect to the Use of water does not meet all the requirements that are made in practice and are relatively expensive in terms of the use of metal salts, with the metal content of the solutions used for the sealing Possibility of contamination of the oxide layer. The effect of the used Metal salts, e.g. B. the cobalt-nickel acetates, is attributed to the fact that they are hydrolytically cleaved and the metal hydroxide in question, e.g. B. Cobalt or nickel hydroxide.
Es .ist bekannt, konzentrierte Schivefels,äure, z. B. 6o- bis 8o%ige Schwefelsäure, zur Reinigung von Oxydschichten zu verwenden, d. h. Verunreinigungen der verschiedensten Art, die durch die Erzeugung in der Schicht, vor allen Dingen in ihren Poren, verbleiben, daraus zu entfernen. Irgendeine Nachdichtwirkung bei den oxydischen Schichten wird also mit konzentrierter Schwefelsäure nicht erreicht.It is known, concentrated Schivefels, acid, z. B. 6o to 8o% Sulfuric acid, to be used for cleaning oxide layers, d. H. Impurities of the most varied kinds, produced by the layer, above all else remain in their pores, remove from it. Any after-sealing effect at the oxidic layers are therefore not reached with concentrated sulfuric acid.
Überraschenderweise ergab sich, daß stark verdünnte Sch-,vefelsäure bei der Anwendung auf Oxydschichten eine gute Nachdichtwirkung zeigte. Diese Säure ist in starker Verdünnung natürlich bei der Verwendung zur Nachdichtung oxydischer Schichten gegenüber den für denselben Zweck verwendeten Metallsalzen erheblich billiger und verunreinigt die oxydis.che Schicht in keiner Weise.Surprisingly, it was found that very dilute sulfuric acid showed a good after-sealing effect when applied to oxide layers. This acid in strong dilution is of course more oxidic when used for re-sealing Layers are considerably cheaper than the metal salts used for the same purpose and does not contaminate the oxidic layer in any way.
Bei der erfindungsgemäßen Behandlung von Oxydschichten, in denen auf photographischem Wege Bilder erzeugt werden, wird außerdem in sehr günstiger Weise das Ausblassen des Photos verhindert. Dieses Ausblassen photographischer Bilder in oxydischen Schichten von Leichtmetallen ist auf restliche Mengen Rhodanid oder Thiosulfat zurückzuführen. Die genannten Stoffe werden bei den photographischen Prozessen vornehmlich als Fixierlösungen und Tonbäder benutzt. Die Behandlung nach dem neuen Verfahren hat nun die besondere Wirkung, diese restlichen Rhodanid- oder Thiosulfatmengen zu zerstören und damit dauerhafte Photobilder zu er. zeugen.In the inventive treatment of oxide layers in which on photographic means of producing images is also very inexpensive prevents the photo from fading out. This fading out of photographic images in oxide layers of light metals there is residual amounts of rhodanide or Attributed to thiosulfate. The substances mentioned are used in the photographic Processes mainly used as fixing solutions and clay baths. the treatment according to the new process now has the special effect of removing these remaining rhodanide or to destroy amounts of thiosulphate and thus to create permanent photographic images. witness.
Die Tatsache, daß auch stark verdünnte Schwefelsäure, insbesondere eine säure mit einem PH-Wert von q. bis 6, diese vorteilhaften Wirkungen aufweist; führte zu der Annahme, daß vielleicht nicht die in dieser stark verdünnten Form vorliegende Schwefelsäure, sondern das Lösungswasser selbst die Nachdichtung ausübe. Diese Annahme ist jedoch irrig, wie sich daraus ergibt, daß nur das -erfindungsgemäße Verfahren den besonderen Effekt der Verhinderung des Ausblassens von Photobildern aufweist, was vor allem bei der Verwendung von Wasser als Nachdichtmittel nicht der Fall ist.The fact that even highly dilute sulfuric acid, in particular an acid with a pH of q. to 6, has these beneficial effects; led to the assumption that perhaps not in this highly diluted form sulfuric acid present, but the water in solution itself exercises the re-sealing. However, this assumption is erroneous, as follows from the fact that only that according to the invention Method has the special effect of preventing photo images from being blown out has, which especially when using water as a post-sealing agent does not the case is.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES129095D DE681493C (en) | 1936-07-09 | 1936-07-09 | Process for treating oxide layers or layers with photographic images produced therein on light metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES129095D DE681493C (en) | 1936-07-09 | 1936-07-09 | Process for treating oxide layers or layers with photographic images produced therein on light metals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE681493C true DE681493C (en) | 1939-09-23 |
Family
ID=7538030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DES129095D Expired DE681493C (en) | 1936-07-09 | 1936-07-09 | Process for treating oxide layers or layers with photographic images produced therein on light metals |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE681493C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE942187C (en) * | 1952-01-19 | 1956-04-26 | Horizons Inc | Process for the production of a photographic layer on a plate made of surface oxidized aluminum |
-
1936
- 1936-07-09 DE DES129095D patent/DE681493C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE942187C (en) * | 1952-01-19 | 1956-04-26 | Horizons Inc | Process for the production of a photographic layer on a plate made of surface oxidized aluminum |
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