Influence of organic additives on the behaviour of zinc electroplating from alkaline cyanidefree electrolyte

Two similar polymeric organic compounds from the polyquaternium family were studied as levelling additives in an alkaline cyanide-free zinc plating electrolyte. One additive (LA) has amide bonds between its monomers and the other (LU) has urea unions in its chemical structure. Copper cementation on...

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Detalles Bibliográficos
Autores principales: Pary, Paola, Bengoa, José Fernando, Conconi, María Susana, Bruno, S., Zapponi, M., Egli, Walter Alfredo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Ingeniería
Química
Electroplating
Zinc
Cyanide-free electrolyte
Alkaline
Organic additives
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/147812
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-147812
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ingeniería
Química
Electroplating
Zinc
Cyanide-free electrolyte
Alkaline
Organic additives
spellingShingle Ingeniería
Química
Electroplating
Zinc
Cyanide-free electrolyte
Alkaline
Organic additives
Pary, Paola
Bengoa, José Fernando
Conconi, María Susana
Bruno, S.
Zapponi, M.
Egli, Walter Alfredo
Influence of organic additives on the behaviour of zinc electroplating from alkaline cyanidefree electrolyte
topic_facet Ingeniería
Química
Electroplating
Zinc
Cyanide-free electrolyte
Alkaline
Organic additives
description Two similar polymeric organic compounds from the polyquaternium family were studied as levelling additives in an alkaline cyanide-free zinc plating electrolyte. One additive (LA) has amide bonds between its monomers and the other (LU) has urea unions in its chemical structure. Copper cementation on zinc and gas evolution during aging of the zinc coatings were used to evaluate the effect of the chemical structure of the organic additives on the characteristic deleterious aging process of the coatings when electrodeposited with LA. Scanning electron microscopy and X-ray diffraction were used to follow surface morphology and crystallographic modifications of the coatings during aging. Faster copper cementation kinetics, zinc whiskers growth, blistering of the coating and N₂, CH₄, CO₂ and H₂ evolution were observed during accelerated aging of the coatings when LA was used. The coatings produced with LU did not show any aging effect. These studies show the strong influence that subtle changes in the chemical structure of the organic additive may have on the performance of zinc coating during storage.
format Articulo
Articulo
author Pary, Paola
Bengoa, José Fernando
Conconi, María Susana
Bruno, S.
Zapponi, M.
Egli, Walter Alfredo
author_facet Pary, Paola
Bengoa, José Fernando
Conconi, María Susana
Bruno, S.
Zapponi, M.
Egli, Walter Alfredo
author_sort Pary, Paola
title Influence of organic additives on the behaviour of zinc electroplating from alkaline cyanidefree electrolyte
title_short Influence of organic additives on the behaviour of zinc electroplating from alkaline cyanidefree electrolyte
title_full Influence of organic additives on the behaviour of zinc electroplating from alkaline cyanidefree electrolyte
title_fullStr Influence of organic additives on the behaviour of zinc electroplating from alkaline cyanidefree electrolyte
title_full_unstemmed Influence of organic additives on the behaviour of zinc electroplating from alkaline cyanidefree electrolyte
title_sort influence of organic additives on the behaviour of zinc electroplating from alkaline cyanidefree electrolyte
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/147812
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