Electrodeposition of gold from formaldehyde-sulfite baths: bath stability and deposits characterization

Cardoso, Juliana Lopes; Filho, Sebastião Gomes dos Santos

doi:10.1590/s0100-40422011000400017

Cited by 4 publications

(1 citation statement)

References 10 publications

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“…Cardoso et al also developed Au(I)-sulphite bath and claimed that the addition of formaldehyde improved the bath life to almost 600 days. On the contrary, they also reported a reduction in the maximum cathodic current with an increase in the concentration of formaldehyde in the bath [175]. Sometimes, various additives are added to the electroplating baths to modify or enhance the coating properties.…”

Section: Different Types Of Gold Electroplating Bathsmentioning

confidence: 99%

A comprehensive review of various non-cyanide electroplating baths for the production of silver and gold coatings

Satpathy

Jena

Das

et al. 2023

International Materials Reviews

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Cyanide-based baths are generally used industrially to produce silver and gold coatings via electroplating. Baths containing ([Au(CN) 2 ] − ) and ([Ag(CN) 2 ] − ) are used for the deposition of gold and silver coatings, respectively. However, due to the severe toxicity, the technical personnel involved in work are at risk. Additionally, the disposal of cyanide-containing wastes poses a significant threat to the environment as they pollute various natural resources. The coatings produced from alkaline cyanide-based baths cause embrittlement of electronic circuit patterns. Due to these reasons, many cyanide-free baths have started to replace the existing cyanide-based baths. In the cyanide-free baths, the primary cyanide complexing agent is replaced with eco-friendly alternative compounds like sulphite, thiosulphate, thiourea, DMH, EDTA, and ionic liquids (ILs). This review article provides an overview of the various cyanide-free electroplating baths available for electroplating silver and gold that are either used for commercial practice or are developed for laboratory-scale use.

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Section: Different Types Of Gold Electroplating Bathsmentioning

confidence: 99%