Nickel electrodeposition from all-sulphate and all-chloride baths. Texture and microhardness

Argyriou, A; Spyrellis, N

dc.contributor.author	Argyriou, A	en
dc.contributor.author	Spyrellis, N	en
dc.date.accessioned	2014-03-01T01:41:53Z
dc.date.available	2014-03-01T01:41:53Z
dc.date.issued	1993	en
dc.identifier.issn	00202967	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/23663
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0027644839&partnerID=40&md5=40304e1009bca453b8f38f654a19767e	en
dc.subject.other	Chlorine compounds	en
dc.subject.other	Crystal growth	en
dc.subject.other	Crystal lattices	en
dc.subject.other	Crystal microstructure	en
dc.subject.other	Crystal orientation	en
dc.subject.other	Electrodeposition	en
dc.subject.other	Electrolysis	en
dc.subject.other	Hardness	en
dc.subject.other	pH effects	en
dc.subject.other	Sulfur compounds	en
dc.subject.other	Textures	en
dc.subject.other	X ray analysis	en
dc.subject.other	All chloride bath	en
dc.subject.other	All sulphate bath	en
dc.subject.other	Cathodic current density	en
dc.subject.other	Electrolytic nickel deposits	en
dc.subject.other	Vickers method	en
dc.subject.other	Nickel plating	en
dc.title	Nickel electrodeposition from all-sulphate and all-chloride baths. Texture and microhardness	en
heal.type	journalArticle	en
heal.publicationDate	1993	en
heal.abstract	In the nickel electrocrystallization process there appears a strong specific inhibition of crystal growth. Various chemical species, such as Ni(OH)2 gaseous H2 or Hads which exist or are formed in the metal-electrolyte interface according to the electrolysis conditions, are selectively adsorbed in the continually regenerated metallic surface and determine the texture of the electrodeposits. The aim of this work is to study the correlation between the texture and the microhardness of nickel deposits. The preferred orientation of the deposits, prepared from all sulphate and all chloride baths, was studied by X-ray diffractometry and the corresponding texture diagrams were traced as a function of the solution pH and the cathodic current density. The microhardness of the deposits was determined by the Vickers method. It is shown that the textures and the microhardness of the deposits depend on the electrolysis conditions, but the hardness seems to be independent of the crystallite orientation, in spite of the related bibliographic references. The preferred orientations and the microhardness of the nickel deposits are produced by the same cause: the specific inhibition of the cathodic surface during the electrodeposition determines the orientation of the crystallites, produces deformation of the crystal lattice and increases the hardness of the deposits.	en
heal.journalName	Transactions of the Institute of Metal Finishing	en
dc.identifier.volume	71	en
dc.identifier.issue	pt 3	en
dc.identifier.spage	83	en
dc.identifier.epage	84	en