DE658463C - Process for resealing oxide-containing layers on light metals - Google Patents
Process for resealing oxide-containing layers on light metalsInfo
- Publication number
- DE658463C DE658463C DES123651D DES0123651D DE658463C DE 658463 C DE658463 C DE 658463C DE S123651 D DES123651 D DE S123651D DE S0123651 D DES0123651 D DE S0123651D DE 658463 C DE658463 C DE 658463C
- Authority
- DE
- Germany
- Prior art keywords
- light metals
- oxide
- resealing
- containing layers
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
Description
Verfahren zum Nachdichten oxydhaltiger Schichten auf Leichtmetallen Ein wichtiges Problem der zu verschiedenen Zwecken auf Aluminium 'und anderen Leichtmetallen hergestellten künstlichen Überzüge vorn Oxyden, Fluoriden, Phosphaten usw. ist die Frage der Abdichtung der fast immer an sich porösen Schicht. Es ist bekannt, lichtempfindliche Stoffe Bohne Bindemittel in ,oxydhaltigen Schichten auf Leichtmetallen einzulagern, wobei diese Stoffe keine Nachdichtwirkung aufweisen, sondern lediglich zur Herstellung vorn Bildern, Schriftzeichen usw. dienen. Auch die bekannte Verwendung von z. B. durch Chr@omate lichtempfindlich gemachten Gelatineschichten beschränkt sich lediglich auf die Bildwiedergabe durch Druck ,oder Photographie. Zur Ausfüllung der Poren @oxydhaltiger Schichten hat man u. a. Chromate vorgeschlagen, mit deren Lösungen die fertiggestellten Schichten behandelt werden. Die Abdichtwirkung der Chromate ist jed,o,ch noch nicht in allen Fällen befriedigend, zumal mit der Zeit vom Riegen ein Teil d°s verwendeten Chromats iausgewaschen wird.Process for resealing oxide-containing layers on light metals A major problem of being used on aluminum 'and other light metals for various purposes manufactured artificial coatings of oxides, fluorides, phosphates, etc. is the Question of the sealing of the almost always porous layer. It is known to be photosensitive Substances without binding agents to be stored in oxide-containing layers on light metals, these substances have no post-sealing effect, but only for production in front of images, characters, etc. are used. Also the known use of z. B. Gelatin layers made photosensitive by chr @ omate are only limited to the reproduction of images by printing or photography. To fill the pores @Oxydhaltiger layers one has among other things. Chromates suggested using their solutions the finished layers are treated. The sealing effect of the chromates every, oh, ch, is not yet satisfactory in all cases, especially as time goes by part of the chromate used is washed out.
Dieser Nachteil wird erfindungsgemäß dadurch vermieden, daß man zur Nachbehandlung der künstliche Überzüge. auf Aluminium und anderen Leichtmetallen eine Chromatlösung benutzt, der Gelatine, Leim Moder andere durch Chro,mat härtbare torganische Körper zugesetzt sind, wonach dann die bekannte Trocknung Emd an sich bekannte Belichtung erfolgt, für die neben dem sichtbaren Licht jauch alle anderen chemisch wirksamen Strahlungsarten benutzt werden können. Durch dieses Verfahren wird die in der Schicht vorhandene Gelatine usw. so weit gehärtet, .daß sie nicht mehr quellfähig ist. Bei sehr intensiver Belichtung gelingt eine sia weitgehende Härtung, daß beispielsweise Gelatine sogar nach mehrstündigem lochen im Wasser nicht mehr zum Quellen, geschweige denn zum Lösen gebracht werden kann. Auf diese Weise erzeugt man durch die erfindungsgemäße Verwendung von durch chemisch wirksame Strahlen, z. B. Lichtstrahlen, g1ähärteten Chromat-Gelatine- ioder Chromat-Leim-Filmen auf verhältnismäßig einfachem Wege gut nachgedichtete überzugsschichten, deren .durch das Chro@mat gelbe Farbe bei der Belichtung in braun übergeht. Die Schichten besitzen eine gute Griffestigkeit und stellen seinen guten Korrosionsschutz dar. Als besonders zweckmäßige Menge des verwendeten organisch härtbiaren Stoffes hat sich die Hinzufügung von i bis io g Gelatine, Leim usw. pro. Liter üblicher Bichnomatlösung erwiesen.This disadvantage is avoided according to the invention that one to Post-treatment of artificial coatings. on aluminum and other light metals a chromate solution used, the gelatin, glue moder other by chromate hardenable Organic bodies are added, after which the known drying Emd per se known exposure takes place, for which in addition to visible light yeah all others chemically effective types of radiation can be used. Through this procedure the gelatin, etc. present in the layer is hardened to such an extent that it does not is more swellable. With very intensive exposure, a sia can be achieved to a large extent Hardening that, for example, gelatine not even after several hours of punching in water can be made to swell, let alone to dissolve. In this way produced by the inventive use of chemically active rays, z. B. light rays, g1ähärteten chromate gelatin ioder chromate glue films relatively simple way well after-sealed coating layers, whose .by the Chro @ mat yellow color turns into brown on exposure. Own the layers a good grip and represent its good corrosion protection. As special appropriate amount of the organic hardenable substance used has the addition from i to io g of gelatin, glue, etc. per. Liters of common Bichnomat solution.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES123651D DE658463C (en) | 1936-07-31 | 1936-07-31 | Process for resealing oxide-containing layers on light metals |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES123651D DE658463C (en) | 1936-07-31 | 1936-07-31 | Process for resealing oxide-containing layers on light metals |
Publications (1)
Publication Number | Publication Date |
---|---|
DE658463C true DE658463C (en) | 1938-04-01 |
Family
ID=7536308
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES123651D Expired DE658463C (en) | 1936-07-31 | 1936-07-31 | Process for resealing oxide-containing layers on light metals |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE658463C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2476957A (en) * | 1946-10-10 | 1949-07-26 | Brenner Abner | Process for producing films of chromated proteins on zinc |
-
1936
- 1936-07-31 DE DES123651D patent/DE658463C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2476957A (en) * | 1946-10-10 | 1949-07-26 | Brenner Abner | Process for producing films of chromated proteins on zinc |
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