John, S. and Balasubramanian, V. and Shanmugam, N.V. and Selvam, M. and Srinivasan, K.N. and Shenoi, B.A. (1986) Blackening of aluminium-zinc (galvalume) coatings for solar energy utilization. Energy Conversion Management , 26 (3/4). pp. 317-320. ISSN 0196-8904

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The authors have reported a method for immersion blackening of Galvalume coatings for use as a selective surface for solar collectors. Such coatings have a solar absorptance (a) of 0.90-0.92 and thermal emittance (e) of 0.25-0.40. The coating has moderate corrosion resistance. In order to improve this, a post-treatment is necessary. The post-treated coatings in dichromate solution offer good corrosion resistance. Thermal cycling tests show that the coatings are stable to 220 deg.C. Tape tests show that the coating is strongly adherent

Item Type: Article
Uncontrolled Keywords: Selective coatings; Black coatings; Galvalume; Flate-plate collectors; Metal colouring; Solar energy; Nickel-black
Subjects: Industrial Metal Finishing
Depositing User: ttbdu cecri
Date Deposited: 01 Nov 2012 13:10
Last Modified: 01 Nov 2012 13:10

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