Chloride-induced corrosion of steel reinforcement is one of the most critical deterioration that causes durability problems on reinforced concrete (RC) structures. Therefore, extending service life through repairing becomes an important mission in maintenance strategies of RC structures. However, the ability to prolong service life by concrete repair is affected by several factors, such as quality of construction, properties of repairing materials, concrete cover depths, etc. In this paper, different patch repair strategies for RC components exposed to chloride attack are considered. Numerical simulations of chloride penetration in new/repaired materials are developed in FreeFEM++ software, which can then be used to model the maintenance measure by cover rebuilding. By adapting a deterministic analysis, this model allows us to study the influence of some main parameters on increasing the effectiveness of patch repair. Based on the results of this study, a proper repair strategy could be developed to optimize the serviceability and safety of RC structures subjected to chloride penetration.