Abstract

The present investigation deals with the electrofabrication of nanostructured Ni-Fe alloy coatings on a mild steel using sulfate bath. The electrolytic bath composition and the current density of the coatings were optimized. Composition analysis by energy dispersive X-ray spectroscopy revealed that the Ni–Fe alloy coatings are of anomalous type. Potentiodynamic polarization corrosion test and electrochemical impedance spectroscopy methods in 3.5% NaCl solution direct towards the lowest corrosion rate at 4 A dm^–2. Hardness and roughness of the coatings were evaluated using Vickers hardness test and atomic force microscopy, respectively. The surface morphological analysis of the coatings was characterized by scanning electron microscopy with energy dispersive X-ray spectroscopy. The phase structure, the texture coefficient, and the crystallite grain size of the coatings were calculated and studied using X-ray diffraction.

中文翻译：

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纳米结构镍铁合金涂层的开发；表征和腐蚀分析

摘要

本研究涉及使用硫酸盐浴在低碳钢上电加工纳米结构Ni-Fe合金涂层。优化了电解浴的组成和涂层的电流密度。通过能量色散X射线光谱仪进行的成分分析表明，镍铁合金镀层属于异常类型。在3.5％NaCl溶液中的电位动力学极化腐蚀试验和电化学阻抗谱方法直接在4 A dm ^–2时达到最低腐蚀速率。分别使用维氏硬度测试和原子力显微镜评估涂层的硬度和粗糙度。通过具有能量色散X射线光谱的扫描电子显微镜对涂层的表面形态分析进行表征。使用X射线衍射计算并研究了涂层的相结构，织构系数和微晶粒径。