Investigation of surface composition of electrodeposited black chrome coatings by X-ray photoelectron spectroscopy

Anandan, C and Grips, VKW and Rajam, KS and Jayaram, V and Bera, P (2002) Investigation of surface composition of electrodeposited black chrome coatings by X-ray photoelectron spectroscopy. In: Applied Surface Science, 191 (1-4). pp. 254-260.

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Abstract

: Solar selective black chromium coating was electrodeposited on pre-treated electroformed nickel substrates from a hexavalent chromium containing bath. The composition of the film was investigated before and after annealing at 400 degreesC for different durations. In the as-deposited condition. the surface of the film was found to have trivalent chromium hydroxide and chromium in the chromate form contrary to previous studies which report the presence of hydroxides and metallic chromium. However in the present study, no evidence for metallic chromium was found. The major component. chromium hydroxide, was converted to Cr2O3 on annealing at 400 degreesC with the loss of water vapor. The chromate form remains but with a lowered concentration.

Item Type:	Journal Article
Publication:	Applied Surface Science
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Stainless-Steel;Aluminum;Mechanisms;Passivity;Corrosion.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	27 Aug 2009 03:47
Last Modified:	19 Sep 2010 05:01
URI:	http://eprints.iisc.ac.in/id/eprint/18351

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