Abstract: As an important secondary processing unit, the safe and stable operation of catalytic cracking is directly related to the full utilization of heavy oil and the improvement of enterprise economic efficiency. This paper systematically analyzes the main corrosion damage mechanisms and corresponding countermeasures for various systems in the catalytic cracking unit during operation, and proposes corrosion control strategies cove-ring material selection for high-temperature areas, corrosion control circuitry for low-temperature areas, equipment design and pipeline layout. By implementing these corrosion control strategies industrially, the corrosion issues in the catalytic cracking unit have been effectively improved, and the service life of equipment and pipelines have been significantly extended. This study can provide a basis and reference for anti-corrosion work in catalytic cracking units, which can help enterprises improve the operating cycle of the units.

Key words: catalytic crackinglcorrosion mechanismlmaterial selectionlprocess anti-corrosionlcorrosion control circuitry