Title:
METHOD AND DEVICE FOR PRODUCING A HIGHLY SELECTIVELY ABSORBING COATING ON A SOLAR ABSORBER COMPONENT, AND SOLAR ABSORBER HAVING SUCH A COATING
Document Type and Number:
WIPO Patent Application WO/2011/117256
Kind Code:
A3
Abstract:
The invention relates to a method for producing a selectively absorbing coating (3) on a solar absorber component (10), comprising the following steps: providing a substrate (1) having a metal surface, determining the inner surface of the metal surface, determining the charge quantity per unit area required for generating the absorbing coating in accordance with the inner surface; electrolytically generating the absorbing coating (3) in a first step by direct-current anodizing the metal surface of the substrate (1), forming a porous oxide coating, and in a second step by alternating-current pigmenting the pores of the oxide coating, direct-current anodizing and alternating-current pigmenting take place until the charge quantity per unit area determined for each step from the inner surface is reached, wherein the ratio between the charge quantity per unit area ρA for the direct-current anodizing and the charge quantity per unit area ρp for the alternating-current pigmenting ρA/ρP = 0.65 to 0.8. The invention further relates to a solar absorbing component (10) produced according to said method.
Inventors:
OSTERMANN DIETER (DE)
Application Number:
PCT/EP2011/054376
Publication Date:
February 23, 2012
Filing Date:
March 22, 2011
Export Citation:
Assignee:
ODB TEC GMBH & CO KG (DE)
OSTERMANN DIETER (DE)
OSTERMANN DIETER (DE)
International Classes:
F24J2/48; C25D7/00; C25D11/22
Foreign References:
| EP1688683A1 | 2006-08-09 | |||
| DE2850134A1 | 1979-05-23 | |||
| US5472788A | 1995-12-05 | |||
| EP0003175A1 | 1979-07-25 |
Attorney, Agent or Firm:
COHAUSZ & FLORACK (Düsseldorf, DE)
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