Corrosion Inhibitors for Reinforced Concrete: A Review

Abstract

The objective of the topic is to review the recent trends in corrosion inhibitors for rein- forced concrete and their application in the laboratory and field conditions. Inhibitors are chemical substances which when added to the concrete in small concentrations will inhibit or prolong the time to initiation of corrosion in concrete structures. This chapter focuses on the type of inhibitors used in concrete based upon their mode of action and the way of application. The section deals with anodic, cathodic, mixed inhibitors; perfor- mance of admixed inhibitor vs. migrating/surface applied inhibitor and their evaluation studies; and electrochemical injection of corrosion inhibitor (EICI) in concrete and elec- trochemical chloride extraction techniques has been reviewed.