Selective paint and black chrome coatings development. Semiannual report, June 5-December 5, 1978
Abstract
Solar selective black chrome and paint coatings were investigated to improve their performance and to develop techniques for large-scale applications. Formulations and processing conditions for thickness sensitive paint coatings were defined which consistently provide solar absorptance (..cap alpha..) of 0.90 and emittance (epsilon) of 0.10 on low emittance substrates. A significant improvement in abrasion resistance was achieved by decreasing the pigment volume concentration. Addition of aluminum flake to these formulations has resulted in a thickness insensitive coating with ..cap alpha.. = 0.90 and epsilon = 0.30. The critical bath components of a commercial black chrome plating process have been identified as hexavalent chromium, trivalent chromium, acetic acid and ferric ion. These components were varied and their effect on coating optical properties and durability at temperatures of 350-400/sup 0/C were studied. Coating thermal stability was significantly improved by reducing the trivalent chromium concentration from the normal 16 g/l to 12 g/l or less. Initial efforts have begun to optimize black chrome systems on aluminum substrates in terms of cost and durability.
- Authors:
- Publication Date:
- Research Org.:
- Honeywell, Inc., Minneapolis, MN (USA). Systems and Research Center
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 5717774
- Report Number(s):
- ALO-4287-T1
- DOE Contract Number:
- EM-78-C-04-4287
- Resource Type:
- Technical Report
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 14 SOLAR ENERGY; BLACK CHROME; OPTICAL PROPERTIES; OPTIMIZATION; PLATING; BLACK COATINGS; PAINTS; SPECTRALLY SELECTIVE SURFACES; ABRASION; ABSORPTIVITY; ACETIC ACID; ALUMINIUM; CHROMIUM; DATA; DIP COATING; EMISSIVITY; FABRICATION; GRAPHS; IRON; PIGMENTS; SILICONES; STABILITY; TABLES; CARBOXYLIC ACIDS; COATINGS; DATA FORMS; DEPOSITION; ELEMENTS; INFORMATION; METALS; MONOCARBOXYLIC ACIDS; ORGANIC ACIDS; ORGANIC COMPOUNDS; PHYSICAL PROPERTIES; POLYMERS; SILOXANES; SURFACE COATING; SURFACE PROPERTIES; SURFACES; TRANSITION ELEMENTS; 141000* - Solar Collectors & Concentrators
Citation Formats
Lin, R J.H., and Zimmer, P B. Selective paint and black chrome coatings development. Semiannual report, June 5-December 5, 1978. United States: N. p., 1978.
Web. doi:10.2172/5717774.
Lin, R J.H., & Zimmer, P B. Selective paint and black chrome coatings development. Semiannual report, June 5-December 5, 1978. United States. https://doi.org/10.2172/5717774
Lin, R J.H., and Zimmer, P B. 1978.
"Selective paint and black chrome coatings development. Semiannual report, June 5-December 5, 1978". United States. https://doi.org/10.2172/5717774. https://www.osti.gov/servlets/purl/5717774.
@article{osti_5717774,
title = {Selective paint and black chrome coatings development. Semiannual report, June 5-December 5, 1978},
author = {Lin, R J.H. and Zimmer, P B},
abstractNote = {Solar selective black chrome and paint coatings were investigated to improve their performance and to develop techniques for large-scale applications. Formulations and processing conditions for thickness sensitive paint coatings were defined which consistently provide solar absorptance (..cap alpha..) of 0.90 and emittance (epsilon) of 0.10 on low emittance substrates. A significant improvement in abrasion resistance was achieved by decreasing the pigment volume concentration. Addition of aluminum flake to these formulations has resulted in a thickness insensitive coating with ..cap alpha.. = 0.90 and epsilon = 0.30. The critical bath components of a commercial black chrome plating process have been identified as hexavalent chromium, trivalent chromium, acetic acid and ferric ion. These components were varied and their effect on coating optical properties and durability at temperatures of 350-400/sup 0/C were studied. Coating thermal stability was significantly improved by reducing the trivalent chromium concentration from the normal 16 g/l to 12 g/l or less. Initial efforts have begun to optimize black chrome systems on aluminum substrates in terms of cost and durability.},
doi = {10.2172/5717774},
url = {https://www.osti.gov/biblio/5717774},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Dec 01 00:00:00 EST 1978},
month = {Fri Dec 01 00:00:00 EST 1978}
}