Advanced Ni–W coatings obtained by the combination of pulse plating and chemometric techniques

Autor:	Naroa Imaz, M. Sarret, M. Ostra, Eva García-Lecina, J. A. Díez
Rok vydání:	2014
Předmět:	Materials science Metallurgy Metals and Alloys chemistry.chemical_element Surfaces and Interfaces Electrolyte Tungsten Condensed Matter Physics Surfaces Coatings and Films Corrosion chemistry Mechanics of Materials Hard chromium Pulse plating Electroplating
Zdroj:	Transactions of the IMF. 92:305-315
ISSN:	1745-9192 0020-2967
DOI:	10.1179/0020296714z.000000000214
Popis:	The electroplating of Ni–W alloys could represent one of the most promising environmentally friendly alternatives to replace hard chromium. However, the Ni–W process and coatings still show some limitations such as lower hardness than hard chromium and limited corrosion resistance that need to be overcome in order to be considered a real solution. In this work, a Ni–W electrolyte was proposed and optimised. A chemometric approach was used in order to design pulse plating experiments and study the effect of experimental parameters on the properties of pulse plated Ni–W coatings. In addition, multivariate analysis was proposed to establish a relation among structural and physical characteristics of Ni–W deposits, and the optimum values of the process parameters required to improve their properties were determined. Results indicate that by the combination of pulse plating and chemometric techniques, Ni–W coatings with improved uniformity, efficiency and hardness compared to those obtained by direct c...
Databáze:	OpenAIRE
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