The development of composite coatings essential to improve the wear and corrosion resistances of the materials employed in numerous applications, such as automobile, chemical, medicine, construction, aerospace, and biomedical industries. In this study, we presented a double-layer coating technique, which consisted of a thermal-sprayed titanium (Ti) layer and a micro-arc oxidation (MAO) film on AISI 1020 steel. The effect of the composite coatings (Ti/MAO) on wear and corrosion resistance was investigated. To obtain a coating thickness from 250 µm to 450 µm, the prepared specimens were coated with Ti (99.9% pure) by arc spraying. Then, the Ti/MAO films were deposited on Ti coatings. The current density of MAO was fixed at 35 A/dm², the voltages were 250, 300, 350, 400, and 450 V, and the duration of the MAO process was 10 min, Measurements of film thickness, microstructure, microhardness, X-ray diffractometry analysis, and scanning electron microscopic observation were performed for determining the characteristics of the composite coatings (Ti/MAO). Potentiodynamic polarization curves were used to compare the corrosion resistance of these composite coatings. A ball-on-disc wear test, using an oscillation friction wear tester, was carried out at room temperature according to the ASTM G99 standard to determine the wear resistance. Among all the specimens, Ti/MAO (400 V) had the greatest hardness, lowest friction coefficient, least weight loss, and longest sliding distance. The sliding distance of Ti/MAO (400 V) was about 1.7 times higher than those of Ti. The open-circuit potential of Ti/MAO (400 V) was about 1.7 times better than those of Ti. The corrosion currents of Ti/MAO (250 V) and Ti/MAO (400 V) were decreased by MAO about 95% and 92%, respectively. Although the corrosion current of Ti/MAO (400 V) was higher than that of Ti/MAO (250 V), Ti/MAO (400 V) had better effects in other tests. According to the results, Ti/MAO (400 V) presented the best performance among all the specimens and provided improved protection to both Ti and substrate.

复合涂层的开发对于提高在许多应用中使用的材料的耐磨性和耐腐蚀性至关重要，例如汽车，化学，医药，建筑，航空航天和生物医学行业。在这项研究中，我们提出了一种双层涂层技术，该技术由AISI 1020钢上的热喷涂钛（Ti）层和微弧氧化（MAO）膜组成。研究了复合涂层（Ti / MAO）对耐磨性和耐腐蚀性的影响。为了获得250 µm至450 µm的涂层厚度，通过电弧喷涂将制备的样品涂上Ti（纯度为99.9％）。然后，将Ti / MAO膜沉积在Ti涂层上。MAO的电流密度固定为35 A / dm ²，电压分别为250、300、350、400和450 V，MAO过程的持续时间为10分钟，测量膜厚，显微组织，显微硬度，X射线衍射分析和扫描电子显微镜观察确定复合涂层（Ti / MAO）的特性。用电位动力学极化曲线比较这些复合涂层的耐腐蚀性。根据ASTM G99标准，在室温下使用振荡摩擦磨损测试仪进行了圆盘磨损试验，以确定耐磨性。在所有样品中，Ti / MAO（400 V）具有最高的硬度，最低的摩擦系数，最小的重量损失和最长的滑动距离。Ti / MAO（400 V）的滑动距离约为Ti的1.7倍。Ti / MAO（400 V）的开路电势是Ti的1.7倍。Ti / MAO（250 V）和Ti / MAO（400 V）的腐蚀电流分别被MAO降低了约95％和92％。尽管Ti / MAO（400 V）的腐蚀电流高于Ti / MAO（250 V），但在其他测试中Ti / MAO（400 V）的腐蚀效果更好。根据结果​​，Ti / MAO（400 V）在所有样品中表现出最佳性能，并为Ti和基材提供了更好的保护。