METHOD FOR THE MANUFACTURING OF A SELECTIVE ABSORBER OF A SOLAR COLLECTOR AND SELECTIVE ABSORBER OBTAINED THEREBY

摘要

Method for the manufacture of a selective absorber of a solar collector allowing to obtain a collector surface for collecting solar radiations with a high absorption factor and a low emission factor. The collector surface is made from an iron based alloy containing chromium which is immersed in an acid bath containing oxygen atoms and at least one sulphur-, selenium-, and/or tellurium-based metalloid substance; the state of the collector surface is previously adjusted with a view to its activation.