Over the past several years there has been a siginficant effort to bring corrosion monitoring into the online real-timeworld of process control technology. As part of this new direction in corrosion monitoring corrosion data (e.g. information on corrosion rate actual B value and parameters for pitting and corrosion filming tendencies) has been directed to the process control system so that it can be viewed in real-time by process and corrosionengineers along with key process variables that are used to manage industrial processes. This paper reviews the evolutionof corrosion monitoring from an offline specialist-oriented relm to online real-time world of process control. It will provide indicate howreal-time corrosion data canmore specifically identify periods and causes of corrosion upsets that werepreviously "invisible" and provide quicker resolution and corrosion solutions with greater value than possible with older offline approaches. This presentation will also include information from case studies to help illustrate these benefits.Keywords: Corrosion monitoring Online real-time plant corrosion process control field operations electrochemical monitoring