Abstract Ni-W alloys with 16–28 at% tungsten (W) content were electrodeposited from citrate bath utilizing various pulse parameters. The influence of pulse parameters on microstructure, composition and mechanical properties was systematically studied. The corrosion behavior was analyzed in 1 M H2SO4 using potentiodynamic polarization and electrochemical impedance spectroscopy. Nanocrystalline Ni-W coatings were found to have superior corrosion resistance compared to their duplex nanocrystalline-amorphous counterpart. The corrosion behavior was rationalized based on semiconducting properties of oxide film using Mott–Schottky analysis and depth wise composition analysis utilizing X-ray Photoelectron Spectroscopy. An attempt is made to correlate corrosion current with intercrystalline defects.

中文翻译：

---

脉冲参数对高钨含量电沉积Ni-W合金涂层力学性能和电化学腐蚀行为的影响

摘要 利用各种脉冲参数从柠檬酸盐浴中电沉积钨 (W) 含量为 16–28 at% 的 Ni-W 合金。系统地研究了脉冲参数对组织、成分和力学性能的影响。使用动电位极化和电化学阻抗谱在 1 M H2SO4 中分析腐蚀行为。发现纳米晶 Ni-W 涂层与其双相纳米晶非晶对应物相比具有优异的耐腐蚀性。使用莫特-肖特基分析和利用 X 射线光电子能谱分析的深度成分分析，基于氧化膜的半导体特性合理化了腐蚀行为。尝试将腐蚀电流与晶间缺陷相关联。