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08548 Hydrogen Permeation Application to Crude Unit Overhead Corrosion Monitoring

Picture for 08548 Hydrogen Permeation Application to Crude Unit Overhead Corrosion Monitoring
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Product Number: 51300-08548-SG
ISBN: 08548 2008 CP
Author: Fred Addington and Faisal M. Al-Faqeer
Publication Date: 2008
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Crude unit overhead corrosion has been a problem for most refineries worldwide. A number of different corrosion mechanisms can result in damage to the crude unit overhead. These mechanisms include low pH corrosion, under deposit corrosion due to salt formation in the overhead, and velocity accelerated corrosion. Hydrogen permeation has been successfully used to monitor crude unit overhead corrosion. A correlation was developed to calculate the corrosion rate based on the hydrogen monitoring technique readings. This paper will discuss the usefulness of the hydrogen permeation correlation in different crude unit overhead troubleshooting scenarios. The correlation corrosion rate showed very good agreement with corrosion rates calculated from ultrasonic thickness measurement (UT) data. In addition, a case history of using the hydrogen permeation monitoring technique to map salt formation areas in one overhead line is discussed.
Crude unit overhead corrosion has been a problem for most refineries worldwide. A number of different corrosion mechanisms can result in damage to the crude unit overhead. These mechanisms include low pH corrosion, under deposit corrosion due to salt formation in the overhead, and velocity accelerated corrosion. Hydrogen permeation has been successfully used to monitor crude unit overhead corrosion. A correlation was developed to calculate the corrosion rate based on the hydrogen monitoring technique readings. This paper will discuss the usefulness of the hydrogen permeation correlation in different crude unit overhead troubleshooting scenarios. The correlation corrosion rate showed very good agreement with corrosion rates calculated from ultrasonic thickness measurement (UT) data. In addition, a case history of using the hydrogen permeation monitoring technique to map salt formation areas in one overhead line is discussed.
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