The aim of this work was to assess the influence of pH and temperature of bath plating on the performance of Ni-Cu/Cr₂O₃ nanocomposite coatings in a corrosive environment. For this purpose, Ni-Cu/Cr₂O₃ nanocomposite coatings were successfully carried out on the carbon steel by co-electrodeposition method from an aqueous composing of H₂O, NiSO₄, NiCl, CuSO₄, Na₃C₆H₅O₇, and H₃BO₃ with and without 6 g/L Cr₂O₃ nanoparticles. The microstructure of samples was studied by x-ray diffraction and scanning electron microscopy, and corrosion behavior of the coatings was assessed by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) in the 3.5% NaCl solution. It was observed that by increasing the bath pH from 3 to 7 the corrosion current density (i_corr) determined by Tafel extrapolation method was changed from 7.4 to 12.5 µA/cm² and that polarization resistance (R_P) obtained from EIS measurements was decreased from 850 to 452 Ω·cm². The values of i_corr and R_P were changed from 11.2 µA/cm² and 514 Ω·cm² to 6.1 µA/cm² and 1265 Ω·cm², respectively, as the bath temperature was varied from 25 to 45 °C. Compared to the Ni-Cu nanocrystalline coating, the value of R_p showed more than 324% improvement when co-electrodeposition of Ni, Cu, and Cr₂O₃ was carried out at a temperature of 45 °C and pH value of 4.5.

这项工作的目的是评估在腐蚀环境下pH和镀液温度对Ni-Cu / Cr ₂ O ₃纳米复合涂层性能的影响。为此，通过共电沉积法成功地在碳钢上由H ₂ O，NiSO ₄，NiCl，CuSO ₄，Na ₃ C ₆ H ₅的水溶液组成了Ni-Cu / Cr ₂ O ₃纳米复合涂层。Ó ₇，和H ₃ BO ₃具有和不6克/ L的Cr ₂ ö ₃纳米粒子。通过X射线衍射和扫描电子显微镜研究了样品的微观结构，并通过在3.5％NaCl溶液中的电位动力学极化和电化学阻抗谱（EIS）评估了涂层的腐蚀行为。观察到，通过将浴液的pH从3增加到7，通过塔菲尔外推法确定的腐蚀电流密度（i _corr）从7.4变为12.5 µA / cm ^2，并且通过EIS测量获得的极化电阻（R _P）降低从850到452Ω·cm ²。i _corr和R _P的值从11.2 µA / cm ²更改当浴温从25℃变化至45℃时，分别为约1μm和514Ω·cm ²至6.1μA/ cm ²和1265Ω·cm ²。与Ni-Cu纳米晶涂层相比，当在45°C的温度和pH值为4.5的条件下进行Ni，Cu和Cr ₂ O _3的共电沉积时，R _p的值提高了324％以上。