Application of Cathodic Protection for Prestressed-Concrete Structure

Abstract

Cathodic protection has been expected to be one of the most useful methods in corrosion protection for reinforcement of concrete structure. On prestressed-concrete (PC) structure, however, there are only a few special examples for the adoption of the cathodic protection because of a serious problem that must be resolved. That is, hydrogen embrittlement of PC tendons due to hydrogen evolution around the tendon in the over-protected condition. This report will present the applicable range of cathodic protection to chloride attacked PC structures.