What is it about?

In this paper there was a key which is the presence of potassium nitrite which added to Watts bath to obtain black nickel by electrodeposition

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Why is it important?

Coatings formed from black metals (i.e., black nickel, black chromium, black cobalt) have been shown to form fairly efficient solar collector surfaces. Black nickel, when plated onto a satin or matt surface, is a selective absorber and is being considered as a suitable coating for solar energy collectors. Several techniques, such as chemical conversion and/ or thermal oxidation of metallic films and electrodeposition, are currently used to achieve such spectrally selective, blackmetal,

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This page is a summary of: Black nickel electrodeposition from a modified Watts bath, Journal of Applied Electrochemistry, December 2005, Springer Science + Business Media,
DOI: 10.1007/s10800-005-9077-8.
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