DEV0000929MA - Galvanic coating of metallic emitters - Google Patents
Galvanic coating of metallic emittersInfo
- Publication number
- DEV0000929MA DEV0000929MA DEV0000929MA DE V0000929M A DEV0000929M A DE V0000929MA DE V0000929M A DEV0000929M A DE V0000929MA
- Authority
- DE
- Germany
- Prior art keywords
- galvanic coating
- metallic emitters
- emitters
- metallic
- nickel layer
- 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
- 239000011248 coating agent Substances 0.000 title claims 2
- 238000000576 coating method Methods 0.000 title claims 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims 1
- 230000005855 radiation Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Description
Es ist bekannt, das ein Körper, dessen Oberflächentemperatur grösser ist als die ihn umgebende, einen unter Umständen verwertbaren Infrarotstrahler darstellt. Die Strahlungsintensität der von diesem Körper emittierten Strahlung ist u.a. bedingt durch dessen Oberflächenbeschaffenheit, insbesondere seines Schwärzegrades. Um den Körper zur grösstmöglichen Emission anzuregen, pflegt man daher, dessen Oberfläche durch irgendein Verfahren der Oberflächenbehandlung zu schwärzen, was z.B. mit Platinmoor, Russ-Natronwasserglas, Graphit geschehen kann.It is known that a body, the surface temperature of which is higher than the one surrounding it, represents an infrared radiator that can be used under certain circumstances. The radiation intensity of the radiation emitted by this body is due, among other things, to its surface properties, in particular its degree of blackness. In order to stimulate the body to emit as much as possible, it is therefore customary to blacken its surface using any surface treatment process, which can be done, for example, with platinum moor, soot-soda waterglass, graphite.
Gemäss der Erfindung wird nun vorgeschlagen, derartig emittierende Flächen, soweit sie aus Metall bestehen, galvanisch mit einer Schwarznickelschicht zu überziehen. Hierdurch erzielt man in einem Temperaturbereich bis etwa 350°C Strahlungseigenschaften, die bis 93% denen des sogenannten "Schwarzen Körpern" nahekommen. Eine Verwendung über 350°C ist nicht möglich, da bei höheren Temperaturen ein allmähliches Zersetzen der Schwarznickelschicht erfolgt. Die Schwarzvernickelung als solche stellt ein galvanotechnisch bekanntes Verfahren dar, das bisher dazu diente, Metallflächen einen gewissen Korrosionsschutz oder ein schwarzes Aussehen zu verleihen. Versieht man aber die Oberfläche eines beliebigen Strahlers, z.B. einen elektrisch beheizten Rohrheizkörper mit einer Schwarznickelschicht, so wird neben der guten Korrosionsfestigkeit auch eine hohe Strahlungsintensität erreicht.According to the invention, it is now proposed that such emitting surfaces, insofar as they consist of metal, be galvanically coated with a black nickel layer. In this way, in a temperature range of up to about 350 ° C, radiation properties are achieved that are up to 93% close to those of the so-called "black body". Use above 350 ° C is not possible, as the black nickel layer gradually decomposes at higher temperatures. Black nickel plating as such is a well-known electroplating process that has hitherto served to give metal surfaces a certain degree of corrosion protection or a black appearance. However, if the surface of any radiator, e.g. an electrically heated tubular heater, is coated with a black nickel layer, a high level of radiation intensity is achieved in addition to good corrosion resistance.
Claims (1)
Family
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