In this work, composite Ni–P-multiwalled carbon nanotube films were produced by electroless deposition. The main goal was to investigate the influence of multiwalled carbon nanotube loading on the local electrochemical behavior of the composite films, as probed by scanning electrochemical microscopy (SECM). The coatings were also characterized with respect to their crystalline structure, surface, and cross-section morphologies. Adhesion strength was examined by scratch tests. The global electrochemical behavior was evaluated by potentiodynamic polarization. The local electrochemical activity was investigated by probing the Fe²⁺ oxidation in the surface generation/tip collection mode of the SECM. The results revealed that multiwalled carbon nanotubes increased the adhesion strength and reduced the electrochemical activity on the surface of the coated samples.

中文翻译：

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管道钢上化学镀镍磷多壁碳纳米管复合涂层的结构表征、全局和局部电化学活性

在这项工作中，复合镍磷多壁碳纳米管薄膜是通过化学沉积制备的。主要目标是通过扫描电化学显微镜 (SECM) 探测多壁碳纳米管负载对复合膜局部电化学行为的影响。还对涂层的晶体结构、表面和横截面形态进行了表征。通过划痕测试检查粘合强度。通过动电位极化评估整体电化学行为。通过探测 Fe ^{2+ 来}研究局部电化学活性SECM 的表面生成/尖端收集模式中的氧化。结果表明，多壁碳纳米管增加了涂层样品的粘附强度并降低了其表面的电化学活性。