Process for manufacturing a selective absorber of a solar collector and selective absorber so obtained
The invention relates to a manufacturing process for a selective absorber for a collector panel of solar radiation with high absorption and low emissivity. The process consists in making the collector panel of the absorber from an iron alloy containing in particular such a filler metal as chromium in the alloyed state and in subjecting said surface to an anodic oxidation in an acid electrolytic bath containing metalloid-based electrically active substances, in particular such sulfur based substances as sulfides. The process of the invention allows making collector panels at low cost and with high selectivity without thereby incurring the danger of degrading said panels either at average or high temperatures.
- Assignee:
- Agence Nationale de Valorisation de La Recherche (France)
- Patent Number(s):
- US 4405414
- OSTI ID:
- 5318556
- Resource Relation:
- Patent Priority Date: Priority date 11 Jul 1979, France; Other Information: PAT-APPL-328135
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
IRON ALLOYS
ANODIZATION
SOLAR ABSORBERS
EMISSIVITY
SPECTRALLY SELECTIVE SURFACES
MANUFACTURING
CHROMIUM COMPOUNDS
DESIGN
FILLER METALS
SOLAR COLLECTORS
ALLOYS
CHEMICAL COATING
CORROSION PROTECTION
DEPOSITION
ELECTROCHEMICAL COATING
ELECTROLYSIS
EQUIPMENT
LYSIS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
SOLAR EQUIPMENT
SURFACE COATING
SURFACE PROPERTIES
SURFACES
TRANSITION ELEMENT COMPOUNDS
141000* - Solar Collectors & Concentrators
360100 - Metals & Alloys