A STUDY Of ACTUAL CRUDE UNIT SULFIDATION CORROSION COMPARED WITH MODEL PREDICTION

Category: Refinery Process Corrosion
Title:               A STUDY OF ACTUAL CRUDE UNIT SULFIDATION CORROSION
                        EXPERIENCE COMPARED WITH MODEL PREDICTION
Authors: Lionel Roberts ,Irving Oil Ltd and Doug Farrell, Nalco Chemical Co
Abstract: In recent years, the Modified McConomy curve has been used to predict corrosion rates in sour processing operation. The McConomy calculation utilizes, sulphur concentration, temperature, metallurgical resistance and velocity to estimate a maximum anticipated corrosion rate for a given data set and process location.
Irving Oil Ltd has been running sweet and sour crude slates in alternating blocks. Irving is well positioned with Electrical Resistance Probes and weight loss coupons to measure corrosion rates over a range of sulphur and temperature combinations.  In addition, there is extensive pre and post sour operation history in the form of RT and UT monitoring.
Our study will look at corrosion from field data from ER Probes and compare to those predicted for specific operating conditions and locations.