Different types of electrochemical corrosion protection systems such as cathodic protection (CP), corrosion inhibitors (CI), and electrochemical chloride extraction (ECE), are currently available for prolonging the service life of reinforced concrete structures, particularly bridges and parking garages. All these protection systems have been utilized on
numerous structures in many parts of the world. The present paper focuses on the above methods of corrosion protection with emphasis on the basic principles of application, test methods and criteria to evaluate their performance. Well-established test techniques that are used to evaluate the corrosion condition of reinforced concrete structures can be utilized to assess the performance of these protection techniques. However, some of the test techniques have shortcomings that can lead to erroneous conclusions. Key issues in properly using some of these test techniques and interpreting the data are discussed. Key words: Corrosion Protection, Reinforced Concrete, Cathodic Protection, Electrochemical Chloride Extraction, Corrosion Inhibitors, Test Methods, Evaluation