NACE 34103

The objective of this report is to provide a document to help predict sulfidation rates and point out areas of vulnerability in the equipment associated with hydroprocessing units. It is intended for use by corrosion engineers and fixed-equipment inspectors. The report summarizes corrosion rate and materials of construction data collected from operating hydroprocessing units and compares them to previously developed corrosion rate curves, based on data from numerous refinery units.

The scope of this report includes:

• Literature Search Results
• Sulfidation in Hydrogen-Free Environments - Mechanism of Sulfidation Corrosion
• Sulfidation in Hydrogen-Hydrogen Sulfide Environments - Mechanism of H2-H2S Corrosion
• Hydroprocessing - Process Overview
• Sulfidation in Distillation and Fractionation Facilities Downstream from Hydroprocessing Units
• Advances in Understanding Since the 2004 Publication of this Technical Committee Report