Assess Sulfidic Corrosion in WHB

Sulfidic corrosion in the waste heat boiler is an ever-present threat to an SRUs reliability.  SulphurPro® can help to assess sulfidic corrosion rates by predicting the H2S concentrations and the tube-wall temperatures along the length of the tubes and determining possible corrosion rates.   Ceramic ferrules are used to protect the hottest area of the tubes but they can shed eddies and can cause increased tube temperatures at their downstream end.  The result can be increased corrosion there.  Oxygen enrichment can greatly increase tube-wall temperature and cause even faster corrosion.

Ceramic Ferrules Inserted through Tubesheet

Schematic of the Tube-to-tubesheet Joint in WHB

Corrosion Chart from Martens et al. (2011)

Sulfidic Corrosion Rate in a WHB Tube