Microelectrode-based studies of interfacial processes related to aqueous corrosion

Metal-electrolyte interfaces usually have multiple processes occurring simultaneously. These include chemical reactions, electrochemical reactions, formation of surface oxides, hydrogen absorption/adsorption and so on. Such processes can influence the environment and lead to variations in ionic concentrations, and pH. Consequently, this can lead to local changes in the electrolyte, which in turn can lead to various ‘second order effects’- affecting chemical and electrochemical reactions at interfaces. This thesis broadly revisits corrosion mechanisms proposed in various alloy systems using modern local/scanning techniques such as scanning electrochemical microscopy (SECM), with the assistance of bulk scale measurements.