Currently, many reinforced concrete structures are designed for a service life of more than 100 years. Coated steel reinforcement have been widely used in anticipation of enhanced corrosion resistance and service life. Two types of coatings (fusion-bonded-epoxy (FBE) and cement-polymer-composite (CPC) coatings) are generally used. However, in most cases, the FBE coating is applied before the bending/cutting of rebars and severely damaged during transport/handling/storage at construction sites. Also, at many construction sites, it has been observed that the CPC coating is applied without adequate preparation of the surface of steel rebars.) These can adversely affect the electrochemical corrosion and bond characteristics of steel reinforcement; and hence, the service life of such steel-coating-concrete (S-C-C) systems. This thesis focuses on these aspects. First, the feasibility of various electrochemical techniques (such as macrocell corrosion current [MCC], half‑cell potential [HCP], linear polarization resistance [LPR], and electrochemical impedance spectroscopy [EIS]) in detecting the initiation of corrosion in S-C-C systems is evaluated. Then, an existing EIS-based test method is refined for electrochemical assessment of S-C-C systems and the chloride thresholds of S-C-C systems with various damage types and quality levels are determined. Findings indicate that the service life of most S-C-C systems in use today would be much shorter than that of the uncoated systems. Then, pull-out tests were conducted on CPC coated rebars embedded in chloride-contaminated and uncontaminated concretes. Negligible corrosion could lead to significant coating disbondment and significant reduction in bond strength of CPC coated systems - much poor performance than that in the uncoated steel rebar systems. Finally, a framework to estimate the service life of coated steel rebars using both the corrosion initiation criterion and bond degradation criterion is proposed. The results on the above will be presented.