Corrosion control at oil refinery units

Abstract

The following methods of corrosion control at oil refineries’ and petrochemical units are described: use of materials compatible with corrosive media (the experience of use of titanium is presented in detail); treatment and change the environment (diminishing the concentration of corrosive substances in streams, e.g., neutralizing of acidic corrosives in overhead; wash by water and soda ash; using of corrosion inhibitors). Corrosion inhibitors in the overhead of crude distillation system and use of polysulfides as corrosion inhibitor at the FCCU are analyzed. Examples of corrosion monitoring at the overhead of the crude distillation system and in the petrochemical plant are given.