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Ni-P based coatings preparation on wrought magnesium alloys

By Martin Buchtík


The aim of this diploma thesis was summary of all steps and knowledge necessary to deposition of quality Ni-P coatings deposited on wrought magnesium alloys AZ31 and AZ61. There is the treatise about wrought magnesium alloys AZ31 and AZ61. Thesis includes its phase composition in the theoretical part. There are given its possible processing methods too. Next, there is desribed the mechanism of deposition of Ni-P coatings, components required to electroless deposition and factors affecting the quality and properties of these coatings. The theoretical part is ended by serie of reviews. Authors of these reviews deal with pretreatment of substrates, preparation, characterization and measuring of mechanical, structure and corrosion properties of deposited coatings. The optimalization of pretreatment, parametres and composition of nickel bath suitable for magnesium alloys is described in experimental part. The microstructure, present interlayer between substrate and Ni-P coating and chemical composition of deposited coatings was observed and measured by optical and electron microscopy. The mechanical characterization of Ni-P coatings was performed by microhardness tester

Topics: Bezproudé niklování; AZ61; pretreatment; Ni-P coatings; AZ31; microhardness.; Electroless nickel deposition; hořčíková slitina; Ni-P povlaky; mikrotvrdost.; předúprava; magnesium alloy
Publisher: Vysoké učení technické v Brně. Fakulta chemická
Year: 2016
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