Galvanic Cathodic Protection: A Sustainable Solution for Concrete Structure Rehabilitation

When – Thursday 18th September 2025

Where – Room 470, Building 405, University of Auckland - 20 Symonds Street, Auckland Central, Auckland.

Agenda –
17:30 pre-presentation refreshments
18:00 presentation

Please register for this presentation below:

Abstract

This presentation explores advanced methods for the corrosion protection of reinforced concrete structures, focusing on two key strategies: cathodic protection using sacrificial zinc anodes, and the application of surface impregnators. The discussion will include both external and internal deployment of zinc anodes, highlighting their effectiveness in mitigating steel reinforcement corrosion through galvanic action. Emphasis is placed on design considerations, installation techniques, and long-term performance monitoring. Additionally, the presentation examines the role of hydrophobic impregnators — such as silanes and siloxanes — in reducing moisture and chloride ingress, thereby enhancing the durability of concrete. A design example will be included. By integrating electrochemical and barrier protection methods, the presentation aims to provide a comprehensive approach to extending the service life of reinforced concrete infrastructure.

Biography

Umberto Rico

Umberto Rico holds a Master’s degree in Civil Engineering from Politecnico di Milano. He began his career in consulting before joining Mapei in 2018 as a Product Engineer, where he specialized in structural strengthening systems, seismic retrofitting, product development, and technical training. He has also provided global consultancy and site support for cathodic protection systems in civil and marine environments. Currently, Umberto serves as APAC Regional Product Manager – Building Line at Mapei.

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