High Temperature Corrosion

Corrosion damages that occur above 200-260°C (392-500°F) are commonly classified as high-temperature corrosion mechanisms. High-temperature corrosion reactions typically involve direct interaction with oxygen (oxidation), molecular hydrogen (HT Hydrogen Attack), or species such as sulfur (sulfidation, high-temperature H2-H2S corrosion).

Sulfidation (w/o H2)

Processing crude slates with an escalating concentration of sulfur species amplifies sulfidation processes within the high-temperature sections of Atmospheric and Vacuum Distillation Units (CDU/VDU). This chapter aims to offer a comprehensive understanding of the sulfidation mechanism, coupled with the relationships between process variables and corrosion. Following this, we will delve into general guidelines for material selection in the context of sulfidation.