ABSTRACT Composite ternary zinc-based alloys Zn-Ni-P and Zn-Fe-P containing embedded multi-walled carbon nanotubes (CNT) were obtained electrochemically. They were treated additionally in an environmentally friendly chemical conversion solution for passivation based on Cr3+-compound. The surface morphology, chemical and phase composition of the coatings after their treatment in the passivating solution were determined by SEM, EDS and XRD analysis respectively. The corrosion behaviour of composite alloy deposits both with or without additional conversion film (CF) was investigated in a model corrosion medium of 5% NaCl using selected methods such as potentodynamic polarisation (PD) curves, electrochemical impedance spectroscopy (EIS) and polarisation resistance (Rp) measurements. The changes in the surface morphology and phase composition of the corrosion tested samples were determined by SEM and XRD analysis. The corrosion studies indicated that the presence of a CF leads to a delay in the anodic dissolution process during the polarisation.

中文翻译：

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Cr3+-基转化膜对电沉积碳纳米管复合三元锌合金腐蚀行为的影响

摘要 电化学获得了包含嵌入的多壁碳纳米管 (CNT) 的复合三元锌基合金 Zn-Ni-P 和 Zn-Fe-P。它们在基于 Cr3+ 化合物的环保化学转化溶液中进行了额外的钝化处理。通过SEM、EDS和XRD分析分别测定钝化液中处理后涂层的表面形貌、化学成分和相组成。采用动电位极化 (PD) 曲线、电化学阻抗谱 (EIS) 和极化电阻等选定方法，在 5% NaCl 的模型腐蚀介质中研究了具有或不具有附加转化膜 (CF) 的复合合金沉积物的腐蚀行为。 Rp) 测量。通过SEM和XRD分析确定腐蚀测试样品的表面形貌和相组成的变化。腐蚀研究表明，CF 的存在导致极化过程中阳极溶解过程的延迟。