Electrochemical Characterization of Al2 O3 -Ni Thin Film Selective Surface on Aluminium

Figen KADIRGAN

Article Details

Electrochemical Characterization of Al2 O3 -Ni Thin Film Selective Surface on Aluminium

Authors:

Figen KADIRGAN

Publisher:

TUBITAK

Journal:

Turkish Journal of Chemistry 1999 Vol.23 Issue 4, pp.381-392

Document Type:

Article

Publication Date:

3/1999

Document Language:

Turkish

Document ID (Org No.):

2000730365

Frequency:

Bimonthly

eISSN:

1303-6130

pISSN:

1300-0527

Abstract:

 

Solar thermal collectors represent a widely used type of  system for the conversion of solar energy.  In order to produce  selective coatings on aluminium substrates to be used as absorber  plates in high efficiency solar collectors, nickel pigmentation was  applied to anodically oxidised surfaces.  Electrochemical dc methods  are used to study the oxidation of aluminium as functions of the  following electrolysis conditions: applied current, pH, temperature  and concentration of electrolyte.  The properties of the oxidised  aluminium surfaces are investigated by cyclic voltammetry.  Nickel  pigmentation of porous aluminium surfaces was also performed as a  function of electrochemical pigmentation conditions by ac  electrodeposition.  Mechanisms contributing to selectivity in  anodically oxided aluminium and electrodeposits are discussed.  The  optical properties of the prepared surfaces are optimised, and solar  absorptance as=0.91 and thermal emittance et,23°C=0.17  are obtained.

 

Solar thermal collectors represent a widely used type of  system for the conversion of solar energy.  In order to produce  selective coatings on aluminium substrates to be used as absorber  plates in high efficiency solar collectors, nickel pigmentation was  applied to anodically oxidised surfaces.  Electrochemical dc methods  are used to study the oxidation of aluminium as functions of the  following electrolysis conditions: applied current, pH, temperature  and concentration of electrolyte.  The properties of the oxidised  aluminium surfaces are investigated by cyclic voltammetry.  Nickel  pigmentation of porous aluminium surfaces was also performed as a  function of electrochemical pigmentation conditions by ac  electrodeposition.  Mechanisms contributing to selectivity in  anodically oxided aluminium and electrodeposits are discussed.  The  optical properties of the prepared surfaces are optimised, and solar  absorptance as=0.91 and thermal emittance et,23°C=0.17  are obtained.

Article Details

Electrochemical Characterization of Al2 O3 -Ni Thin Film Selective Surface on Aluminium

Authors: Figen KADIRGAN

Publisher: TUBITAK

Journal: Turkish Journal of Chemistry 1999 Vol.23 Issue 4, pp.381-392

Document Type: Article

Publication Date: 3/1999

Document Language: Turkish

Document ID (Org No.): 2000730365

Frequency: Bimonthly

eISSN: 1303-6130

pISSN: 1300-0527

Issues

Authors:

Figen KADIRGAN

Publisher:

TUBITAK

Journal:

Turkish Journal of Chemistry 1999 Vol.23 Issue 4, pp.381-392

Document Type:

Article

Publication Date:

3/1999

Document Language:

Turkish

Document ID (Org No.):

2000730365

Frequency:

Bimonthly

eISSN:

1303-6130

pISSN:

1300-0527