Control Criteria and Materials Performance Studies for Cathodic Protection ofReinforced Concrete

摘要

The objective of the work was to investigate the feasibility of improved andsimplified control criteria for cathodic protection of concrete structures. Corrosion rates of steel were established in a simulated concrete environment as a function of chloride contamination, pH, temperature and cathodic protection current. Mathematical models were developed to establish concentration profiles which develop as a result of cathodic protection current, and to study current distributions which result from geometric factors. These studies are combined to develop improved and simplified current-based control criteria. Long-term effects of cathodic protection current on concrete and aggregate near the steel and the anode were also investigated. (Copyright (c) 1993 National Academy of Sciences.)