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 |
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Rok vydání: | 2014 |
Předmět: | |
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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