Abstract: Currently, the increasing trend of crude oil deterioration poses greater challenges to corrosion control management, making it imperative to establish a scientific and standardized corrosion control workflow. A certain refinery has compiled a corrosion control manual for its crude distillation unit (CDU) based on identify-ing corrosion mechanisms and classifying corrosion circuits. This paper elaborates on the unit′s corrosion risk identification process for indivi-dual circuits using the corrosion control manual in conjunction with the operational process parameters, inspection of identified high-risk areas and subsequent internal examination verification during shutdown maintenance of the unit. It also expounds the critical significance of the corrosion control manual in corrosion management and formulates a PDCA closed-loop corrosion management workflow centered on this manual.

Key words: corrosion control manuallcorrosion circuitlcorrosion managementlcrude distillation unit