DE354693C - Process for the production of a layer on metal objects which is resistant to chemical agents - Google Patents

Process for the production of a layer on metal objects which is resistant to chemical agents

Info

Publication number
DE354693C
DE354693C DER54300D DER0054300D DE354693C DE 354693 C DE354693 C DE 354693C DE R54300 D DER54300 D DE R54300D DE R0054300 D DER0054300 D DE R0054300D DE 354693 C DE354693 C DE 354693C
Authority
DE
Germany
Prior art keywords
layer
resistant
metal objects
production
silver bromide
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
DER54300D
Other languages
German (de)
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.)
WALTER ROTH DR
Original Assignee
WALTER ROTH DR
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 WALTER ROTH DR filed Critical WALTER ROTH DR
Priority to DER54300D priority Critical patent/DE354693C/en
Application granted granted Critical
Publication of DE354693C publication Critical patent/DE354693C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/02—Apparatus characterised by being constructed of material selected for its chemically-resistant properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/02—Apparatus characterised by their chemically-resistant properties
    • B01J2219/0204—Apparatus characterised by their chemically-resistant properties comprising coatings on the surfaces in direct contact with the reactive components
    • B01J2219/0236—Metal based

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Non-Insulated Conductors (AREA)

Description

Verfahren zur Erzeugung einer gegen chemische Agentien widerstandsfähigen Schicht auf metallenen Gegenständen.Process for producing a chemical agent resistant Layer on metal objects.

Die Erfindung bezweckt, metallene Gegenstände, die zu elektrochemischenoder chemischen Reaktionen, insbesondere solcher unter Druck oder bei höheren Temperaturen, verwendet werden, widerstandsfähig gegen die Einwirkung vieler chemischer Agentien, namentlich von Säuren, zu machen. The invention aims to provide metal objects which are electrochemical or chemical reactions, especially those under pressure or at higher temperatures, used, resistant to the action of many chemical agents, especially of acids.

Die Erfindung besteht darin, daß man die Gegenstände, z. B. kalorimetrische Bomben, Destillationsapparate, Tiegel, Schalen, Schiffchen, Deckel, Dichtungen, Röhren, Stäbe, Drähte und Bleche, mit einer Schicht von Silberbromid überzieht. Die Widerstandfähigkeit eines solchen Überzuges läßt sich noch erheblich vergrößern, wenn man ihn vorürergehend einer höheren Temperatur aussetzt, durch die er geschmolzen wird. Zweckmäßig ist es, den Gegenstand danach nochmals mit einer dünnen Silberbromidschicht zu überziehen, damit etwaige bei der Abkühlung der geschmolzenen Silberbromidschicht entstandene Risse wiederum mit Silberbromid ausgefüllt werden. The invention consists in that the objects, for. B. calorimetric Bombs, stills, crucibles, shells, boats, lids, seals, Tubes, rods, wires and sheets, coated with a layer of silver bromide. The resistance of such a coating can be increased considerably, if it is initially exposed to a higher temperature that melts it will. It is useful to apply a thin layer of silver bromide to the object afterwards to be coated with it as the molten silver bromide layer cools down any cracks that have arisen are again filled with silver bromide.

Das Verfahren kann beispielsweise in folgender Weise ausgeübt werden. The method can be practiced, for example, in the following manner.

Ein Feinsilberblech, das widerstandsfähig gemacht werden soll, wird in einem geschlossenen Raume, z. B. einer geschlossenen Flasche, etwa I2 Stunden lang bei Zimmertemperatur der Einwirkung von Bromdampf ausgesetzt, wodurch auf dem Blech Silberbromid entsteht, Danach wird der erhaltene Silberbromidüberzug geschmolzen und das Blech nochmals 2 Stunden lang in Bromdampf hineingehängt, so daß man auf der Oberfläche des Bleches eine zusammenhängende, nur wenige tausendstel Millimeter dicke, kohärente Schutzschicht erhält, die selbst längere Zeit konzentrierter Flußsäure auch bei höherer Temperatur, z. B. beim Aufschließen von Silikaten, ausgesetzt werden kann, ohne daß eine nennenswerte Menge des Schutzüberzuges, wie Versuche bewiesen haben, in Lösung geht. A fine silver sheet that is to be made resistant is in a closed space, e.g. B. a closed bottle, about 12 hours exposed to bromine vapor for a long time at room temperature, causing the Sheet silver bromide is formed, then the silver bromide coating obtained is melted and hung the tray in bromine vapor for another 2 hours so that you can open it the surface of the sheet is a coherent, only a few thousandths of a millimeter Thick, coherent protective layer is maintained, which even for a long time concentrated hydrofluoric acid even at higher temperatures, e.g. B. during the digestion of silicates, are exposed can without a significant amount of the protective coating, as tests have shown have, goes into solution.

Sollte trotzdem durch einen geringen chemischen Angriff ein Teil der Schutzschicht abgenutzt worden sein, so kann leicht wieder eine e Erneuerung der Schicht vorgenommen werden. Should nevertheless be a part of a minor chemical attack If the protective layer has been worn out, it can easily be renewed of the shift.

Die mit einer Silberbromidschicht überzogenen, gegebenenfalls vorher mit einem kohärenten Silberüberzug versehenen Metalle können auch noch nachträglich mit einer Schicht von Platinschwarz überzogen und dann in vorteilhafter Weise als Elektroden bei der Messung von elektrischem Leitvermögen verwendet werden. Die Silberbromidschicht verbessert das Tonminimum in dem als Nullinstrument dienenden Telephon ganz erheblich, so daß Silberbromidelektroden den Platinelektroden kaum nachstehen, dagegen platinierte Silberelektroden ohne Bromidüberzug erheblich übertreffen. Those coated with a silver bromide layer, if necessary beforehand Metals provided with a coherent silver coating can also be used subsequently coated with a layer of platinum black and then advantageously used as Electrodes can be used in measuring electrical conductivity. The silver bromide layer improves the sound minimum in the telephone serving as a null instrument quite considerably, so that silver bromide electrodes are hardly inferior to the platinum electrodes, whereas they are platinum-coated Significantly outperform silver electrodes without a bromide coating.

Claims (3)

PATENT-ANSPRÜCHE: 1. Verfahren zur Erzeugung einer gegen chemische Agentien widerstandsfähigen Schicht auf metallenen Gegenständen, dadurch gekennzeichnet, daß die Gegenstände mit einer Schicht von Silberbromid überzogen werden. PATENT CLAIMS: 1. Process for generating an anti-chemical Agent-resistant layer on metal objects, characterized in that the objects are coated with a layer of silver bromide. 2. Ausführungsform des Verfahrens nach Anspruch I, dadurch gekennzeichnet, daß die aufgebrachte Silberbromidschicht geschmolzen wird. 2. Embodiment of the method according to claim I, characterized in that that the applied silver bromide layer is melted. 3. Ausführungsform des Verfahrens nach Anspruch I und 2, dadurch gekennzeichnet, daß die mit einer geschmolzenen Silberbromidschicht versehenen Gegenstände nochmals mit einer gleichen Bromidschicht überzogen werden. 3. Embodiment of the method according to claim I and 2, characterized characterized in that the objects provided with a molten layer of silver bromide be coated again with the same bromide layer.
DER54300D 1921-11-01 1921-11-01 Process for the production of a layer on metal objects which is resistant to chemical agents Expired DE354693C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER54300D DE354693C (en) 1921-11-01 1921-11-01 Process for the production of a layer on metal objects which is resistant to chemical agents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER54300D DE354693C (en) 1921-11-01 1921-11-01 Process for the production of a layer on metal objects which is resistant to chemical agents

Publications (1)

Publication Number Publication Date
DE354693C true DE354693C (en) 1922-06-12

Family

ID=7409620

Family Applications (1)

Application Number Title Priority Date Filing Date
DER54300D Expired DE354693C (en) 1921-11-01 1921-11-01 Process for the production of a layer on metal objects which is resistant to chemical agents

Country Status (1)

Country Link
DE (1) DE354693C (en)

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