METHOD FOR APPLYING A SPECTRAL SELECTIVE COATING ON AN ENAMELED METAL PLATE FOR THE MANUFACTURE OF SOLAR HEAT COLLECTORS

摘要

A spectrally selective coating is formed on a dark coloured enamelled metal surface by forming on the enamel layer a coating of a solution comprising one or more organic tin compounds capable of being thermally decomposed to form spectrally selective tin oxide, and trifluoroacetic acid in glacial acetic acid, and heating the coated surface to decompose the compound(s). Coated plates so produced are useful as solar heat collectors.