Tribological and corrosion behaviour of electroless Ni-B coating possessing a blackberry like structure |
| |
Authors: | Ferhat Bülbül Hikmet Altun ?zkan Kü?ük Vefa Ezirmik |
| |
Affiliation: | 1. Mechanical Engineering Department, Ataturk University, Erzurum, Turkey 2. Chemical Engineering Department, Ataturk University, Erzurum, Turkey 3. Material and Metallurgy Engineering Department, Ataturk University, Erzurum, Turkey
|
| |
Abstract: | This study aims to evaluate the tribological and corrosion properties of the electroless Ni-B coating deposited on AISI 304 stainless steels. The microstructure of the coating was characterized using x-ray diffraction (XRD) and scanning electron microscopy-energy dispersive spectrometry (SEM-EDS). XRD analysis revealed that the prepared coating possessed an amorphous character. SEM-EDS investigation also indicated that a non-stoichiometric Ni-B coating was deposited with a columnar growth mechanism on the stainless steel substrate and the morphology of the growth surface was blackberry-like. The hardness and tribological properties were characterized by microhardness and a pin-on-disc wear test. The electroless Ni-B coated sample had a higher degree of hardness, a lower friction coefficient and a lower wear rate than the uncoated substrate. The electrochemical potentiodynamic polarization method was used to evaluate the corrosion resistance of the coating. The electroless Ni-B coating offered cathodic protection on the substrate by acting as a sacrificial anode although it was electrochemically more reactive than the stainless steel substrate. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|