Cathodic corrosion Protection on Facade Columns

Building Section B (detention wing) of the Hamm Police Headquarters, a two-story reinforced concrete structure built in 1996, showed advanced corrosion damage on the exposed fair-faced concrete columns. The exposed position of the edge and corner columns, as well as their proximity to paved traffic areas, led to increased chloride contamination in the base zone.

As part of the refurbishment project, 20 exterior facade columns up to a height of 1.1 m above foundation level were equipped with a cathodic corrosion protection (CCP) system. Due to the complex geometry and varying concrete conductivities between the existing structure and potential repair areas, a differentiated current distribution was required.

To address this challenge, the Noxeco system was implemented, enabling precise and individual current control for each anode circuit without additional design effort. This ensured effective protection current distribution between the existing reinforcement and newly installed supplementary steel.

The combination of robust mesh and rod anode technology, together with intelligent control via Noxeco components, guarantees sustainable protection of the load-bearing structural elements with minimal intervention in the building fabric.