Aluminum alloy 2024 is widely applied to aircraft because it has excellent mechanical properties. However, the application requires better properties on the surface. However, in its application, sometimes better properties are needed on the surface. This experiment aimed to evaluate the effect of electroplating time duration (nickel solution: 15 and 20 minutes, and chromium solution: 10, 15, and 20 minutes) on surface roughness. Investigate surface hardness due to variations in electroplating time: 10, 15, 20, 20, 25, 30, and 35 minutes. The results show that the time duration can affect the surface roughness after electroplating coating compared to untreated samples. On the other hand, electroplating on 2024 alloy with time variations, initially the surface hardness value increases with increasing time duration and reaches the highest at 25 minutes (electroplating time), then the hardness value decreases with increasing treatment time duration.

2024铝合金由于具有优良的机械性能而被广泛应用于飞机上。然而，该应用需要更好的表面特性。然而，在其应用中，有时需要更好的表面性能。本实验旨在评估电镀持续时间（镍溶液：15 和 20 分钟，铬溶液：10、15 和 20 分钟）对表面粗糙度的影响。由于电镀时间的变化而调查表面硬度：10、15、20、20、25、30 和 35 分钟。结果表明，与未经处理的样品相比，持续时间会影响电镀涂层后的表面粗糙度。另一方面，电镀2024合金随时间变化，