Bernasconi R, Panzeri G, Firtin G, Kahyaoglu B, Nobili L, Magagnin L
Dipartimento di Chimica, Materiali e Ingegneria Chimica Giulio Natta, Via Mancinelli 7, 20131, Milano, Italy.
J Phys Chem B. 2020 Nov 25;124(47):10739-10751. doi: 10.1021/acs.jpcb.0c04784. Epub 2020 Nov 11.
The present work follows the trend to develop non-aqueous electrolytes for the deposition of corrosion resistant ZnNi alloys. It investigates the use of the choline chloride/ethylene glycol (1:2 molar ratio) eutectic mixture and of pure ethylene glycol as solvents for ZnNi electroplating. The electrochemical behavior of Zn and Ni is investigated via cyclic voltammetry, and potentiostatic ZnNi deposition is performed. Ni content is found to be precisely tunable in the 10-20% wt range, which presents the highest industrial interest for corrosion protection. ZnNi coatings obtained are characterized from the morphological and phase composition point of view. Evidence of the formation of a metastable γ ZnNi phase is observed for both choline chloride/ethylene glycol and pure ethylene glycol. Finally, potentiodynamic corrosion tests are performed to assess their corrosion properties.
目前的工作顺应了开发用于沉积耐腐蚀锌镍合金的非水电解质的趋势。它研究了氯化胆碱/乙二醇（摩尔比1:2）共晶混合物和纯乙二醇作为锌镍电镀溶剂的用途。通过循环伏安法研究了锌和镍的电化学行为，并进行了恒电位锌镍沉积。发现镍含量在10-20%重量范围内可精确调节，这在腐蚀防护方面具有最高的工业应用价值。从形态和相组成的角度对所得的锌镍涂层进行了表征。在氯化胆碱/乙二醇和纯乙二醇中均观察到亚稳γ锌镍相形成的证据。最后，进行了动电位腐蚀试验以评估其腐蚀性能。
