Cataphoresis, also known as e-coating, electrocoating, or electrophoretic coating, is the process of applying a concentration of high-quality epoxy resins and pigments to electrically conductive surfaces to increase the corrosion resistance of the materials by electrochemical principles. For this reason, when it comes to creating an anti-corrosion coating on metal surfaces with complex shapes, electrolytic deposition is the most suitable method. By using this method, it is possible to ensure the uniformity and smoothness of the anti-corrosion coating, regardless of the shape and complexity of the metal surfaces. Analysing the influence of more critical factors on the crack length found was the objective of this research. The samples used in the planned experiment were made from steel of the type VDA 239-100 CR4, CR5. A total of 88 individual specimens were made according to the design of experiments methodology. A central composite design was used. For sample 83, the technological operation of chemical degreasing was omitted, and for sample 84, in addition to degreasing, activation, and phosphating were also carried out. The concentration factors of the degreasing solution and the residence time in the degreasing solution were monitored during the bending test. The results were presented in a graphical dependency plot.