Electrodeposition of Zinc-nickel Alloy Coatings PDF Download

Author: J. W. Dini
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Abner Brenner
Publisher: Elsevier
ISBN: 1483223116
Category : Technology & Engineering
Languages : en
Pages : 735

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Book Description
Electrodeposition of Alloys: Principles and Practice, Volume I covers the general and theoretical aspects of the electrodeposition of alloy containing silver and/or copper. This book is organized into three parts encompassing 21 chapters. The first part considers first the history of electrodeposition, the applications of electrodeposited alloys, and the practical considerations involved in electrodeposition. This part also deals with the effect of operating variables on composition of electrodeposited alloys, and the physico-chemical properties of the alloy. The second part focuses on the theoretical aspects of alloy electrodeposition. This part includes discussions on the role of cathode diffusion layer, the effects of complexing agents, and the concept of alloy plating. The third part discusses the practical aspects of the electrodeposition of alloys, focusing primarily on the electrodeposition of alloys from aqueous solutions. This part examines first brass and bronze plating, followed by the electrodeposition of copper-tin, silver, and iron containing alloys. This book is directed toward electrochemists and researchers.

Author: Parijat Bhatnagar
Publisher:
ISBN:
Category : Alloy plating
Languages : en
Pages : 234

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Author: AMS B Finishes Processes and Fluids Committee
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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This SAE Standard specifies the guidance and the requirements for the electrodeposition of zinc-nickel alloy coatings on a range of metallic substrates for the provision of corrosion resistance to steel components and galvanic compatibility between some bi-metallic contacting surfaces. AMS03-040A stabilizes this document because this document contains mature technology that is not expected to change and thus no further revisions are anticipated.

Author:
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ISBN:
Category :
Languages : en
Pages :

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One possible substitute for cadmium in some applications is a zinc--nickel alloy deposit. Previous work by others showed that electrodeposited zinc--nickel coatings containing about 85 percent zinc and 15 percent nickel provided noticeably better corrosion resistance than pure zinc. Present work which supports this finding also shows that the corrosion resistance of the alloy deposit compares favorably with cadmium.

Author: Nasser Kanani
Publisher: Elsevier
ISBN: 0080505392
Category : Technology & Engineering
Languages : en
Pages : 367

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Book Description
Electroplating: Basic Principles, Processes and Practice offers an understanding of the theoretical background to electroplating, which is essential if the practical results are to be as required. This book is different in that it explains HOW the electrodeposition processes work, covering such topics as the elctrodeposition of composites, multilayers, whisker formation and giant magnetoresistive effects. The section on R & D approaches will be especially useful for organisations in the field. This is the first English language version of a well-known German language book from a prestigious author of international repute.'Electroplating' is an invaluable resource for manufacturers of coatings, electrochemists, metal finishers and their customers and academics in surface engineering.·Offers an understanding of the theoretical background to electroplating·Explains how the electrodeposition processes work·Prestigious author of international repute

Author: Lei Chen
Publisher:
ISBN:
Category : Alloy plating
Languages : en
Pages : 204

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Author: Mark Fischer Mathias
Publisher:
ISBN:
Category :
Languages : en
Pages : 476

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Author: Herb Geduld
Publisher: Hyperion Books
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 380

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Author: Sriraman Kankoduthavanitham Rajagopalan
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
"Sacrificial metallic coatings, such as those based on Zn and Cd are used to protect steel components against corrosion. Growing environmental and health concerns have limited the use of Cd in any form since Cd plating bath is cyanide based and Cd compounds are carcinogenic. This thesis investigates Zn-Ni as a potential replacement for Cd and Cd based alloy coatings used in aerospace industries and Zn in automotive industries with respect to their tribological, corrosion and tribocorrosion resistance and hydrogen embrittlement susceptibility. In situ tribometry and additional ex situ analyses revealed that Zn-Ni coatings had superior resistance to adhesive wear compared to cadmium coatings. The microhardness of Zn-Ni coatings was higher than Zn and Cd coatings. Hardness on the wear track of Zn-Ni coatings showed the formation of strain hardened tribo layer. Zn-Ni coatings had higher polarization resistance after wear testing as compared to zinc and cadmium coatings. The mass loss due to wear enhanced corrosion was less with Zn-Ni than with Zn and Cd coatings. Zn-Ni coatings are a suitable replacement to Cd coatings when the surfaces are subjected to simultaneous wear and corrosion. Zn-Ni coatings had higher polarization resistance after the 24 hour immersion tests compared to zinc and cadmium coatings. Zn-Ni coatings offer better sacrificial corrosion protection because of low corrosion rates, and are a suitable replacement for Cd coatings. The Passivated Zn-Ni coatings showed lower corrosion resistance when heat treated due to localized damage of passive films while there was no effect of heat treatment on corrosion resistance of as plated Zn-Ni coatings. During the electrodeposition of metals, hydrogen is evolved due to electrolysis. The evolved hydrogen may diffuse outward and become trapped in the substrate/coating interface or migrate inward into the steel lattice causing delayed embrittlement when the component is subjected to stress. This study reports two principal variables for Zn, Zn-Ni, and Cd coatings: (i) quantity of hydrogen absorbed by the coating and substrate, by vacuum thermal desorption (ii) permeability of the coating material to hydrogen, by electrochemical permeation. The findings were analyzed in correlation with microstructural characteristics of both the coating material and the coating/substrate interface. With Zn-Ni, both coating process and coating material combined to significantly reduce the risk of internal hydrogen embrittlement by: (i) introducing the least amount hydrogen during the electrodeposition process, and (ii) by the ease with which hydrogen can be extracted by baking due to the presence of cracks in the coating.Keywords: Zn-Ni, Cd, Cd-Ti, Zn, EIS, insitu tribology, tribocorrosion, hydrogen permeation, TDS" --