Nickel electrolytic colouring of anodic alumina for selective solar absorbing films

On The Generation of Interferometric Colors in High Purity and Technical Grade Aluminum: An Alternative Green Process for Metal Finishing Industry

“…Subsequently, the nanopores of the oxide layer are filled with heavy metals or toxic dyes by AC electrodeposition or infiltration methods, respectively, and a final sealing step applied. [7][8][9][10][11][12][13][14][15] These approaches have been extensively used to color metal pieces/structures for more than a century. [16] However, these methods present inherent drawbacks since these toxic chemicals can eventually be released when the oxide layer degrades or erodes with use, generating human health and environmental issues since these chemical compounds are highly toxic.…”

Developments in the synthesis of flat plate solar selective absorber materials via sol–gel methods: A review

“…Electroplating/electrochemical deposition (including chemical conversion/chemical bath deposition (CBD)) [17][18][19][20], vacuum deposition (physical vapor deposition (PVD)/sputtering) [8,21,22], chemical vapor deposition (CVD) [8,23], mechanical grinding [11], and sol-gel methods [24][25][26] are some of the methods that have been used to synthesize the absorber coatings, but only a handful of these have been applied on an industrial scale [27].…”

Influence of tin content on spectral selectivity and thermal conductivity of Sn–Al2O3 solar selective absorber

“…In Fig. 2a-c, the surface of the samples was quite homogeneous similar to the ordinary anodized Al substrate prepared to be a solar absorber black coatings [3,19,20]. The shallow marks of the surfaces occurred during the phenomenon of sealing the Al 2 O 3 pores.…”