ABSTRACT Zn–Ni alloys were electrodeposited on stainless steel from a sulphate bath in the presence of EDTA (ethylenediaminetetraacetic acid) as a complexing agent. The electrochemical behaviour of the bath was studied by cyclic voltammetry (CV), chronoamperometry (CA). Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis showed a change in surface morphology; the phase structure corresponds to the face centre cubic (fcc) structure attributed to the γ phase (Ni5Zn21). The corrosion measurements of the obtained deposits with various EDTA concentrations were studied using potentiodynamic polarisation. Results showed that the deposit obtained in the presence of a low EDTA concentration (0.25 g L−1) exhibits better corrosion resistance.

中文翻译：

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含络合剂硫酸盐浴制备锌镍合金的形貌和成分

摘要 在 EDTA（乙二胺四乙酸）作为络合剂存在的情况下，Zn-Ni 合金从硫酸盐浴中电沉积在不锈钢上。通过循环伏安法 (CV)、计时电流法 (CA) 研究了电解液的电化学行为。扫描电子显微镜 (SEM) 和 X 射线衍射 (XRD) 分析显示表面形态发生变化；相结构对应于归因于 γ 相 (Ni5Zn21) 的面心立方 (fcc) 结构。使用动电位极化研究了具有各种 EDTA 浓度的所得沉积物的腐蚀测量值。结果表明，在低 EDTA 浓度（0.25 g L-1）存在下获得的沉积物表现出更好的耐腐蚀性。