Black chrome solar selective coating

Conference · Tue Jan 01 04:00:00 EST 1980

OSTI ID:5139957

Pettit, R B; Sowell, R R

Electrodeposited black chrome solar selective coatings have frequently experienced thermal stability problems when heated to temperatures above 250/sup 0/C (480/sup 0/F) in air. By reducing the trivalent chromium concentration in the standard black chrome plating bath, coatings on nickel substrates are obtained which are stable for thousands of hours at 350/sup 0/C (660/sup 0/F) and for hundreds of hours at 400/sup 0/C (750/sup 0/F). These results have been obtained consistently on a laboratory scale, but difficulty in reproducing the results has been encountered in a production environment. A current study of the effects of known plating variables on the optical properties and thermal stability of coatings is aimed at establishing an acceptable range for each plating parameter. A preliminary process specification for electroplating mild steel substrates with a stable black chrome coating is presented.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5139957
• Report Number(s): SAND-80-1480C; CONF-800955-2
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
141000* -- Solar Collectors & Concentrators
AGING
BLACK CHROME
BLACK COATINGS
CLEANING
COATINGS
DEPOSITION
ELECTRODEPOSITED COATINGS
ELECTRODEPOSITION
ELECTROLYSIS
ELECTROPLATING
ELEMENTS
EQUIPMENT
FABRICATION
HIGH TEMPERATURE
LYSIS
METALS
NICKEL
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PLATING
SOLAR ABSORBERS
SOLAR EQUIPMENT
SPECIFICATIONS
SPECTRALLY SELECTIVE SURFACES
SUBSTRATES
SURFACE CLEANING
SURFACE COATING
SURFACE FINISHING
SURFACE TREATMENTS
SURFACES
TEMPERATURE EFFECTS
TRANSITION ELEMENTS