A novel additive sodium diisopropylnaphthalene sulfonate (SDIPNS) was investigated in Zn-Mn electrodeposition on steel from chloride bath. To this end, cyclic voltammetry was performed in absence and presence of SDIPNS to study different electrochemical systems. Electrochemical data showed that SDIPNS increases Zn deposition overpotential, resulting from strong adsorption of SDIPNS molecules on the cathode surface. The effects of scan rate, switching potentials on the electrochemical behavior of Zn-Mn co-deposition were investigated. The variation of scan rate reveals that the Zn-Mn co-deposition is associated with charge transfer coupled with the mass transfer. SDIPNS concentration was investigated with regard to the Mn content in the final coatings. The chemical composition result showed that Mn-rich deposits, containing 20 wt.% of Mn, are successfully deposited under low cathodic potential (E = − 1.52 V vs. Ag/AgCl). The surface characterization of Zn-Mn coatings was explored by scanning electron microscopy (SEM). The presence of SDIPNS in the electrolytic bath permits to obtain compact, well adherent, and fined grain Mn-rich alloys.

研究了一种新型的添加剂二异丙基萘磺酸钠（SDIPNS）在氯化物浴中在钢上进行Zn-Mn电沉积的过程。为此，在不存在和存在SDIPNS的情况下进行循环伏安法以研究不同的电化学系统。电化学数据表明，SDIPNS增加了Zn沉积的超电势，这是由于SDIPNS分子在阴极表面上的强烈吸附所致。研究了扫描速率，开关电位对Zn-Mn共沉积电化学行为的影响。扫描速率的变化表明，Zn-Mn共沉积与电荷转移和质量转移有关。关于最终涂层中的Mn含量，研究了SDIPNS浓度。化学成分结果表明，富含Mn的沉积物含有20 wt。％的Mn，E  = − 1.52 V vs.Ag/AgCl）。Zn-Mn涂层的表面表征通过扫描电子显微镜（SEM）探索。电解槽中SDIPNS的存在可以得到致密，附着力强和细晶粒的富锰合金。