Influence of the Tungsten Content on Surface Properties of Electroless Ni-W-P Coatings

Ternary Ni-W-P films were produced by electroless deposition using baths with different tungsten concentrations. After deposition, the coated surfaces were annealed at 400°C for 1h. Surface morphology and film composition in the as-plated condition were assessed by SEM and EDS analyses, respectively. The crystalline phases after annealing were investigated by X-ray diffraction (XRD). Nanoindentation tests were performed to assess the mechanical properties of the deposited films. Surface roughness was determined by confocal laser scanning microscopy (CLSM). Friction coefficient was evaluated by reciprocating were tests in a nanotribometer. The corrosion behavior was evaluated by potentiodynamic polarization curves. The results showed that the surface morphology, crystallization behavior and corrosion resistance were affected by the tungsten content in the film. The best corrosion performance was obtained for the ternary films after annealing. Hardness, surface roughness and friction coefficient were dependent of the tungsten concentration in the film.

本数据集通过化学镀法制备了不同钨浓度镀液对应的三元镍-钨-磷（Ni-W-P）薄膜。镀膜完成后，将涂层表面置于400℃环境中退火1小时。分别采用扫描电子显微镜（SEM）与能量色散X射线能谱（EDS）分析，表征了镀态样品的表面形貌与薄膜成分。通过X射线衍射（XRD）研究了退火后的晶相组成。采用纳米压痕测试评估了沉积薄膜的力学性能。通过共聚焦激光扫描显微镜（CLSM）测定了表面粗糙度。利用纳米摩擦测试仪开展往复摩擦测试，以评估摩擦系数。通过动电位极化曲线评价了薄膜的腐蚀行为。结果表明，薄膜中的钨含量会对表面形貌、结晶行为及耐蚀性产生显著影响。经退火处理的三元薄膜展现出最优的耐腐蚀性能。薄膜的硬度、表面粗糙度与摩擦系数均随镀液中的钨浓度变化而改变。