Abstract
Material characterization and electrochemical performance of the pulse plated Ni-W alloy coatings were assessed by varying duty cycles (0–50%) and pulse frequencies (10–500 Hz) under relatively low applied current density (0.1 mA·cm−2). Compared to DC electroplating, the pulse plating process exhibited lower cathodic current efficiency, and the obtained coatings displayed slightly lower W content. However, the surface roughness, hardness, and anti-corrosion properties of the coatings were improved due to common characteristics, such as grain refinement, fewer defects, and enhanced surface uniformity, associated with the pulse plating process. The Ni-W alloy coating produced at a medium pulse frequency of 100 Hz with duty cycles of 10% and 50% exhibited the highest hardness (5.34±0.33 GPa) and the best corrosion resistance (corrosion current density Ic: 9.62 μA·cm−2), respectively. These properties were significantly improved compared to those for the counterparts prepared by DC electroplating (hardness: 3.13±0.58 GPa; Ic: 10.89 μA·cm−2).
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
