Cathodic protection of reinforcement in concrete – experience and development over 30 years

Abstract

This paper presents developments over 30 years in the field of cathodic protection of steel reinforcement in concrete in The Netherlands and elsewhere. From the late 1980s major developments have been: application to large numbers of precast elements corroding due to mixed-in chloride with drilled in titanium anodes and conductive coatings; analysis of working life of systems and components and end-of-life considerations; application to prestressed structures; new anode types including galvanic systems with associated life and design considerations; numerical modelling and preventative applications. Presently, CP has become a fully accepted method of securing safety and serviceability of buildings and infrastructure. Major successes and lessons learned will be presented. Technical and non-technical developments are highlighted and some recent innovative CP systems are discussed.

Assessment of the Impressed Current Cathodic Protection System after 4 Years Operation: Evolution Over Temperature and Time of the Applied Current and Tension on Anodic Zones of the Saint-Cloud Viaduct (France)

“…Exposure to rain and solar radiation have an effect on resistivity (Polder & Peelen, 2019). But in the present case, with a functioning draining system, repaired since the notification of its deterioration, and the global overview of data collected from an entire semester, the influence of precipitation and the water content should be similar between the four types of zones.…”

“…The anodic zones should regroup areas with homogeneous conditions. A heterogenous current distribution inside an anodic zone could lead to overprotection or, on the contrary, to insufficient protection of isolated parts of the anode system (Hunkeler, 1992;Polder & Peelen, 2019). The vertical division "top outside", "top inside", "central" and "bottom", should have reduced heterogeneity.…”

Cathodic Protection Of Reinforcement In Concrete – Overview And Experience Over 30+ Years

“…ICCP was installed in Tilburg on two identical 17-story apartment buildings in 1990 [24]. These systems were the seventh and eighth concrete CP systems installed in The Netherlands, which made them pioneering in several respects.…”