Solar absorptance of black cobalt and black cobalt-silver films and its relation with roughness coefficient

Cobalt oxide and cobalt oxide-silver selective surfaces were prepared in a galvanostatic mode by means an electrodeposition bath, using different depo sition times, on stainless steel substrates. Later, the roughness factor of the selective surfaces, were determined in order to establish one relation with the electrodeposition time and the solar absorptance of the black cob alt and black cobalt-silver coatings. (C) 2001 Elsevier Science Ltd. All ri ghts reserved.