Effect of P on the hardness temperature resistance of nanostructured Ni-W electrodeposited coatings

M. J. L. GINES; M. J. LOUREIRO; F. J. WILLIAMS

PLATING AND SURFACE FINISHING

National Association of Surface Finishing

Lugar: Washington; Año: 2009 p. 30 - 35

0360-3164

The development of electrodeposited coatings with enhanced properties is nowadays focused on nanotechnology. More specifically, the development of temperature-resistant hard coatings for a wide variety of applications is gaining attention. Hard chromium coatings electrodeposited from hexavalent plating baths are widely used for improving hardness, wear resistance and decorative appearance of engineering tools and components despite the serious health and environmental problems they cause. Therefore, researchers have been looking for adequate replacements of Cr-based coatings. Nanostructured Ni-W coatings are one of the potential replacements that have been extensively studied. In this work, we investigated the mechanical properties temperature dependence of electrodeposited Ni-W and Ni-W-P coatings. Changes in composition were controlled by changing the phosphorus concentration in the plating bath. The presence of P improves the mechanical property temperature resistance of the electrodeposited Ni-W coatings.