Laser nanocrystallisation and corrosion behaviour of electroless Ni–W–P coating with high phosphorus content
| Autor: | George Thompson, Zhan-Guo Liu, H. L. Yao, Gary Harrison, Fernando Viejo, H. Liu |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Scanning electron microscope Metallurgy Metals and Alloys Surfaces and Interfaces engineering.material Condensed Matter Physics Laser Surfaces Coatings and Films law.invention Corrosion Dielectric spectroscopy Coating Mechanics of Materials law Volume fraction engineering Crystallite Composite material Spectroscopy |
| Zdroj: | Transactions of the IMF. 92:212-217 |
| ISSN: | 1745-9192 0020-2967 |
| DOI: | 10.1179/0020296714z.000000000171 |
| Popis: | This paper reports an investigation of microstructural characteristics in electroless Ni–3·9W–13·4P (wt.%) coating by laser nanocrystallisation using a quantitative X–ray diffraction (XRD) method and scanning electron microscopy (SEM) with energy dispersive X–ray spectroscopy (EDX). The corrosion resistance of the coatings before and after laser treatment has been evaluated in 0·5 M H2SO4 solution by potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) techniques. The results show that the laser treatment improves the corrosion resistance of the coatings. The corrosion mechanism has been studied and correlated to the microstructural characteristics including volume fraction of INi3P/Itotal, microstrain, and the crystallite size of the Ni and Ni3P phases. |
| Databáze: | OpenAIRE |
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