Lifetime Extension of Thermally Sprayed Zinc Anodes for Corrosion Protection of Reinforced Concrete Structures by Using Organic Top-coatings

摘要

Structural damage in concrete structures caused by corrosion is widespread and demands comprehensive repair work. The additional installation of an active corrosion protective systems for reinforced concrete structures that are located in unfavourable conditions is imperative. Thermally sprayed coatings serving as anodes have been adapted from cathodic protection of steel. These systems have gained attention as they offer advantages in efficiency and lower cost. Thermally sprayed zinc coatings are applied to new steel reinforced concrete structures or those which are subject to rehabilitation. In this contribution, the capability of various systems is examined in field tests in a marine structure in the Arabian Gulf and in different laboratory tests under natural and accelerated conditions.