Ni–W alloy coatings have various applications because they are capable of replacing hard chromium coatings due to their corrosion, oxidation, wear, and hardness properties. Moreover, these alloys demonstrate excellent mechanical and thermal stability at high temperatures leading to possible specialized applications of such coatings. In this study, the effect of pulse frequency and current density on the structure and properties of electrodeposited Ni–W coating were investigated. Pulse electro-co-deposition technique was employed to synthesize Ni–W alloy coatings by varying pulse frequency and current density. The deposition process was performed in the newly established deposition bath that does not contain surfactants and stress-relieving agents. The Ni–W-coated samples were evaluated to determine surface mechanical (microhardness and wear) and electrochemical properties. Phase formation, microstructure, and compositional analysis of Ni–W alloy coatings were examined by XRD, SEM, and EDS, respectively. Microstructure examination revealed that morphology of the coating varied with pulsed frequency and current density. An increase in the current density at fixed pulse frequency improved the surface mechanical properties (hardness and wear properties) owing to higher W content, fine, and dense structure of the coating. The maximum hardness (920 HV) and wear resistance were observed in the Ni–W coating that was obtained at the current density of 60 mA cm⁻² and frequency of 2 kHz. Electrochemical polarization test and EIS study carried out in 3.5 wt pct NaCl solution reveal that a decrease in corrosion resistance of the coating is due to finer morphology or strained matrix whereas higher W content improves the corrosion resistance.

Ni-W合金涂层具有多种应用，因为它们具有腐蚀，氧化，磨损和硬度特性，能够代替硬铬涂层。而且，这些合金在高温下表现出优异的机械和热稳定性，从而导致此类涂层的可能专门应用。在这项研究中，研究了脉冲频率和电流密度对电沉积Ni-W涂层结构和性能的影响。脉冲电共沉积技术用于通过改变脉冲频率和电流密度来合成Ni-W合金涂层。在新建立的不包含表面活性剂和应力消除剂的沉积浴中进行沉积过程。对Ni-W涂层样品进行了评估，以确定其表面机械性能（显微硬度和磨损）和电化学性能。通过XRD，SEM和EDS分别检查了Ni-W合金镀层的相形成，显微组织和成分分析。显微组织检查表明，涂层的形貌随脉冲频率和电流密度而变化。由于较高的钨含量，涂层的细致密结构，固定脉冲频率下电流密度的增加改善了表面机械性能（硬度和磨损性能）。在电流密度为60 mA cm的Ni–W涂层中观察到最大硬度（920 HV）和耐磨性 和EDS分别。显微组织检查表明，涂层的形貌随脉冲频率和电流密度而变化。由于较高的钨含量，涂层的细致密结构，固定脉冲频率下电流密度的增加改善了表面机械性能（硬度和磨损性能）。在电流密度为60 mA cm的Ni–W涂层中观察到最大硬度（920 HV）和耐磨性 和EDS分别。显微组织检查表明，涂层的形貌随脉冲频率和电流密度而变化。由于较高的钨含量，涂层的细致密结构，固定脉冲频率下电流密度的增加改善了表面机械性能（硬度和磨损性能）。在电流密度为60 mA cm的Ni–W涂层中观察到最大硬度（920 HV）和耐磨性^-2和2 kHz的频率。在3.5 wt％的NaCl溶液中进行的电化学极化测试和EIS研究表明，涂层的耐蚀性降低是由于更精细的形貌或应变基体，而较高的W含量则提高了耐蚀性。