Offshore platforms are facilities with a constant need to control the integrity of structures. Made of low-carbon steel and partially immersed in seawater, they are prone to corrosion. One of the main ways to preserve such platforms is to use cathodic protection. It can be made in two ways: by the impressed current method and by the sacrificed anode method. Due to the aging of the structures and external influences that cause damage to the coating, the protection of the platform needs to be constantly restored. When restoring protection, the sacrificed anode method is used more often due to lower current requirements and ease of fabrication. For such a performance, a less noble metal, such as zinc, is used, which becomes a sacrificial anode in a galvanic system with a structure. Most offshore platforms have complex geometries due to the required stability under operating conditions. This complex geometry makes it even more difficult to achieve an even distribution of platform potential. In practice, the restoration of protection of complex geometry platform is carried out by grouping and distributing the anodes around the model as needed. However, to optimize the cathodic protection modeling process, it is important to know the impact of anode distribution. To analyze the real case of platform protection renewal, a 120 times smaller model of the actual platform of the geometry complex was made. The model was coated with anti-corrosion coating and damage was inflicted in accordance with actual examples and the age of the platform. 8 positions were selected to observe the influence of complex geometry and potential distribution. Zinc reference electrodes were placed at these 8 positions. 10 sacrificial anodes were made and grouped into two groups. The impact of seawater hydrodynamics was simulated by using a pump. Based on the developed system, the influence of anode distribution, anode distance and electrolyte flow on the potential distribution and cathodic protection current of the platform model was observed. Adequate protection of the complex geometry model was achieved by the sacrificial anode method. A stronger polarization of the midpoints of the model relative to the top and bottom of the model was shown, while the shading of the position did not play a significant role. By moving the anode away from the model, the polarization decreased. Better potential distribution was achieved with one group of anodes. Electrolyte flow caused an increase in protection current, where a greater impact was observed on a system with a single group of anodes. It was concluded that in the conductive electrolyte, the distribution of anodes around the structure is unnecessary.