Edge corrosion

Edge corrosion is a major problem in the field of corrosion protection, especially for metallic components with complex geometries. The protective coating applied to edges and sharp transitions is often thinner than on flat surfaces. As a result, the protective effect is reduced at these points and corrosion is more likely to form there. The different layer thicknesses are caused by the coating process, during which the coating material adheres less well to edges or runs off.

Effective surface protection must therefore be designed in such a way that it also provides sufficient protection in critical areas such as edges. The choice of coating process, suitable pre-treatment and material selection play a key role here. Uniform corrosion protection can only be ensured through targeted adaptation of all process steps.

Edge corrosion can weaken the component structure in the long term and lead to considerable consequential damage. It is therefore crucial to take it into account at an early stage in the design and surface treatment process. Modern processes and materials offer improved options for permanently protecting even exposed areas.