Abstract: The hybrid uses of fiber-reinforced polymer (FRP) and steel bars can effectively mitigate the performance limitations of using a single type of reinforcement in concrete structures. However, the durability of hybrid-reinforced concrete columns (hybrid-RC) remains unclear. To address this, accelerated aging tests were conducted on hybrid-RC columns with basalt fiber-reinforced polymer (BFRP) and steel bars under simulated marine conditions. The eccentric compressive performance of corroded hybrid-RC columns was compared with that of steel-reinforced concrete columns through loading tests. The parameters included longitudinal reinforcement type, reinforcement spacing, BFRP bar surface treatment, concrete cover thickness, and exposure duration (0/120/240/360 days). The experimental results demonstrate that the use of sand-coated BFRP bars benefits durability, with significantly slower degradation rates in axial load capacity, stiffness, and ductility for the corresponding specimens. In contrast, increased stress levels in BFRP bars accelerate material corrosion, exacerbating structural performance deterioration. At the initial corrosion stage (120 days), all specimens show an increase in axial load capacity, which declines with increased exposure duration. The pre-yield stiffness continuously improves with exposure duration, while the post-yield stiffness (except for specimens with sand-coated BFRP bars) decreases. A computational model for the axial load capacity of corroded hybrid-RC columns was established, incorporating material performance degradation, and the calculated results agreed well with experimental data.