DE556685C - Etchants for metals and alloys - Google Patents
Etchants for metals and alloysInfo
- Publication number
- DE556685C DE556685C DE1930556685D DE556685DD DE556685C DE 556685 C DE556685 C DE 556685C DE 1930556685 D DE1930556685 D DE 1930556685D DE 556685D D DE556685D D DE 556685DD DE 556685 C DE556685 C DE 556685C
- Authority
- DE
- Germany
- Prior art keywords
- alloys
- metals
- heavy metals
- etching
- compounds
- 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
- 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
- C23C22/05—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 using aqueous solutions
- C23C22/06—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 using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—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 using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
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)
- ing And Chemical Polishing (AREA)
Description
Ätzmittel für Metalle und Legierungen Zusatz zum Patent 496 113 In der Patentschrift 496 113 ist ein Mittel beschrieben worden, das zum Ätzen von Schriften, Bildzeichen u. dgl. in Eisen und Eisenlegierungen dient und aus einem Gemisch von Säuren und Schwermetallverbindungen, besteht, wobei die Schwermetalle in Form von Selenverbindungen zur Anwendung kommen. Für eine Reihe von Sonderstählen ergab aber auch dieses Mittel noch unbefriedigende Resultate bezüglich des Farbtons der erhaltenen Schriften und der Handhabung.Etching agent for metals and alloys Addendum to patent 496 11 3 In patent specification 496 113 an agent has been described which is used for etching writings, symbols and the like in iron and iron alloys and consists of a mixture of acids and heavy metal compounds, wherein the heavy metals are used in the form of selenium compounds. For a number of special steels, however, this agent also gave unsatisfactory results with regard to the color tone of the fonts obtained and the handling.
Durch eine große Zahl systematischer Versuche wurde nun gefunden, daß die Wirkung des Ätzmittels dadurch verbessert werden kann, daß man die Selenverbindungen teilweise oder auch ganz durch entsprechende Tellurverbindungen ersetzt. Hierbei haben sich die Tellurverbindungen der Schwermetalle der vierten und fünften Gruppe des periodischen Systems besonders bewährt.A large number of systematic experiments have now found that the effect of the etchant can be improved by using the selenium compounds partially or completely replaced by corresponding tellurium compounds. Here have the tellurium compounds of the heavy metals of the fourth and fifth groups of the periodic system.
Gegenüber dem im Hauptpatent genannten Ausführungsbeispiel, in dem als Säuregemisch Königswasser gebraucht wird, weist die vorliegende Zusatzerfindung noch den Vorteil auf, daß als Säure lediglich Salzsäure benutzt und die Salpetersäure ausgeschaltet werden kann. Der Gebrauch von Salpetersäure ist für die Praxis von Nachteil, weil sie die mit solchem Ätzmittel arbeitenden Leute durch Gelbfärben der Haut belästigt und auch die bei der Ätzung verwendeten Gummistempel und Ätzgründe ziemlich stark angreift. Solche Erscheinungen werden vermieden, wenn das Ätzmittel als Säure lediglich Salzsäure enthält. Unter Berücksichtigung dieser geschilderten Versuchsergebnisse eignet sich für die Ätzung von Sonderstählen z_. B. folgendes Gemisch: 5o g Wismutselenit, 5 g Antimontellurit, I kg ro °/oige Salzsäure.Compared to the embodiment mentioned in the main patent, in which The present additional invention has aqua regia used as an acid mixture still has the advantage that the only acid used is hydrochloric acid and nitric acid can be turned off. The use of nitric acid is for the practice of Disadvantage because they yellow the people working with such caustic annoyed the skin and also the rubber stamps and etching grounds used for the etching attacks quite heavily. Such phenomena are avoided when the etchant only contains hydrochloric acid as acid. Taking this into account Test results are suitable for the etching of special steels z_. B. the following Mixture: 50 g bismuth selenite, 5 g antimony tellurite, 1 kg percent hydrochloric acid.
Durch weitere experimentelle Arbeit wurde nun festgestellt, daß sich das Verfahren reicht nur für Eisen und Eisenlegierungen eignet, sondern auch für die meisten andern Schwermetalle, insbesondere für Kupfer und dessen Legierungen Messing, Tombak, Bronze; ferner für die Hartmetalle nach Art der Stellite auf der Basis von Wolfram- und Kobaltcarbid, die bekanntlich für-,Schneidwerkzeuge mit Höchstleistungen verarbeitet werden; ferner für Nickel und Nickellegierungen, wie Neusilber, Konstantan und Monelmetall, schließlich auch für Zink, Zinn, Blei und deren Legierungen und sogar für das Edelmetall Silber und seine Legierungen. Durch Variation der Komponenten kann man die Intensität der Färbungen den vorliegenden Bedürfnissen weitgehend anpassen. Je nach der Stellung des zu ätzenden Metalls in der Spannungsreihe bestehen die Färbungen aus den Selenverbindungen des Metalls bzw. der Legierung selbst, wie dies etwa beim Silber und auch beim Kupfer der Fall ist, oder sie enthalten auch noch die Selenverbindungen bzw. Tellurverbindungen der im Ätzmittel vorhandenen, oben angedeuteten Schwermetalle. Z. B. eignet sich zum Ätzen von Messing eine Mischung aus 40 g Antimontellurit, 8o g Wismutselenit, 300 g Salzsäure, spez. Gew. i,i5, 58o g destilliertem Wasser.Through further experimental work it has now been found that the process is only suitable for iron and iron alloys, but also for most other heavy metals, in particular for copper and its alloys brass, tombac, bronze; also for the hard metals of the stellite type on the basis of tungsten and cobalt carbide, which are known to be processed for cutting tools with maximum performance; also for nickel and nickel alloys, such as nickel silver, constantan and monel metal, finally also for zinc, tin, lead and their alloys and even for the precious metal silver and its alloys. By varying the components, the intensity of the coloration can largely be adapted to the requirements at hand. Depending on the position of the metal to be etched in the voltage series, the colors consist of the selenium compounds of the metal or the alloy itself, as is the case with silver and copper, or they also contain the selenium compounds or tellurium compounds of the im Heavy metals indicated above. For example, a mixture of 40 g of antimony tellurite, 80 g of bismuth selenite, 300 g of hydrochloric acid, spec. Weight 1.5, 58o g of distilled water.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE556685T | 1930-05-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE556685C true DE556685C (en) | 1932-08-13 |
Family
ID=6564851
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1930556685D Expired DE556685C (en) | 1930-05-22 | 1930-05-22 | Etchants for metals and alloys |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE556685C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2509446A1 (en) * | 1981-07-08 | 1983-01-14 | Anvar | METHOD FOR MANUFACTURING A SELECTIVE SOLAR SENSOR ABSORBER AND SELECTIVE ABSORBER OBTAINED |
-
1930
- 1930-05-22 DE DE1930556685D patent/DE556685C/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2509446A1 (en) * | 1981-07-08 | 1983-01-14 | Anvar | METHOD FOR MANUFACTURING A SELECTIVE SOLAR SENSOR ABSORBER AND SELECTIVE ABSORBER OBTAINED |
EP0070069A1 (en) * | 1981-07-08 | 1983-01-19 | ANVAR Agence Nationale de Valorisation de la Recherche | Process for making a selective absorber for solar collectors |
WO1983000169A1 (en) * | 1981-07-08 | 1983-01-20 | Aries, Lucien | Method for the manufacturing of a selective absorber of a solar collector and selective absorber obtained thereby |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE556685C (en) | Etchants for metals and alloys | |
DE902253C (en) | Process for the production of pure aluminum alcoholates or pure aluminum hydroxide from aluminum alloys | |
DE448474C (en) | Thermoelectric combination, especially for temperature measurement | |
DE871132C (en) | Process for flotation of ores | |
DE561160C (en) | Manufacture of items that are exposed to warming during the manufacturing process or in the factory | |
DE567696C (en) | Improvement of the mechanical properties, in particular the strength of compounds of metals with silicon or phosphorus or of alloys with a content of these compounds in excess of 40% | |
DE691529C (en) | Process for the splitting hydrogenation of extracts from solid fuels | |
AT134260B (en) | Process for improving the mechanical properties of materials. | |
AT165095B (en) | Method for sharpening tools such as files or the like. | |
DE823764C (en) | Selenium rectifier with an electrode made of an almost eutectic alloy containing cadmium | |
DE1594512A1 (en) | lubricant | |
DE824394C (en) | Electrical resistance material and method of making it | |
DE533077C (en) | Crushing jaws for stone crushers | |
DE829019C (en) | Rectifier elements for copper oxide dry rectifiers | |
DE519741C (en) | Method for producing contact pieces | |
DE566852C (en) | Process for the preparation of formic acid from formates | |
AT109384B (en) | Process for refining zinc-magnesium-aluminum alloys. | |
DE582937C (en) | Alloys that are hot-workable | |
DE697436C (en) | Process for the production of objects from gold-beryllium alloys | |
DE608772C (en) | Process for the production of hard alloys | |
DE651934C (en) | Light metal key | |
AT67797B (en) | Process for machining pure iron. | |
DE536002C (en) | Process for removing thallium from cadmium containing thallium | |
DE821556C (en) | Platinum alloy | |
DE687898C (en) | Process for the splitting hydrogenation of extracts from solid fuels |