Zn–Ni–TiO₂ composite coating was developed through response surface methodology. The current density and concentration of TiO₂ were optimized to obtain a minimum corrosion rate. The optimized condition obtained from the central composite design achieved a minimum experimental corrosion rate of 0.122 mm/year as a response for the Zn–Ni–TiO₂ composite coating with a current density of 2.91 A/dm² and concentration of TiO₂ 4.9 g/L. The potentiodynamic polarization and electrochemical impedance spectroscopic method was used to measure the corrosion resistance. The antimicrobial activity of the composite coating was assessed. Growth of Gram-negative and -positive microbes was observed on the polished mild steel. However, the composite coating exhibited resistance to Gram-negative microorganisms. Surface characterization was carried out using scanning electron microscopy (SEM) along with energy-dispersive X-ray spectroscopy depicting the presence of Zn, Ni, Ti, and O elements in the composite coating. Atomic force microscopy confirmed the surface roughness and heterogeneous distribution of crystal grain.

Zn-Ni-TiO ₂复合涂层是通过响应面方法开发的。优化电流密度和TiO ₂浓度以获得最小腐蚀速率。从中心复合设计获得的优化条件实现了 0.122 毫米/年的最小实验腐蚀速率，作为对电流密度为 2.91 A/dm ²和 TiO ₂浓度的 Zn-Ni-TiO ₂复合涂层的响应4.9 克/升。动电位极化和电化学阻抗光谱法用于测量耐腐蚀性。评估复合涂层的抗菌活性。在抛光的低碳钢上观察到革兰氏阴性和阳性微生物的生长。然而，复合涂层表现出对革兰氏阴性微生物的抗性。使用扫描电子显微镜 (SEM) 以及描述复合涂层中存在的 Zn、Ni、Ti 和 O 元素的能量色散 X 射线光谱仪进行表面表征。原子力显微镜证实了晶粒的表面粗糙度和不均匀分布。