PROCESS FOR MAKING A SELECTIVE ABSORBER FOR SOLAR COLLECTORS

摘要

PCT No. PCT/FR82/00113 Sec. 371 Date Mar. 3, 1983 Sec. 102(e) Date Mar. 3, 1983 PCT Filed Jul. 2, 1982 PCT Pub. No. WO83/00169 PCT Pub. Date Jan. 20, 1983.The invention concerns a fabrication process for a selective absorber of a solar collector to achieve a solar-radiation collection-surface with high absorptivity and low emissivity. The collector surface is made of an iron alloy containing chrome and is immersed in an acid bath containing oxygen atoms and at least one metalloid substance based on sulfur, selenium and/or tellurium; beforehand, the state of the collector surface is adjusted for activation.