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07678 Erosion-Corrosion of Cast White Irons for Application in the Oilsands Industry

Picture for 07678 Erosion-Corrosion of Cast White Irons for Application in the Oilsands Industry
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Product Number: 51300-07678-SG
ISBN: 07678 2007 CP
Author: Anne Neville and Faisal Reza
Publication Date: 2007
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Erosion-corrosion is an important aspect of durability for materials used in the oilsands industry. The combination of a corrosive fluid and high volume of sand means that erosion, corrosion and their synergistic interactions all act to accelerate material damage. Material degradation rates are typically controlled by use of surface engineering or by use of hard alloys such as those studied in this paper. The high chromium Cast White Irons (CWIs) are an important class of material for components used for slurry handing apparatus in the oilsands process. In this paper results from an evaluation of corrosion and combined erosion-corrosion are reported. Erosion processes accelerate corrosion and the extent of the acceleration is dependent on the alloying of the CWI. However, it is found that the ranking of the three CWIs tested was common when assessing corrosion and combined erosion-corrosion degradation. The degradation in erosion-corrosion is primarily by matrix extrusion from a mechanical point of view. Corrosion processes act to accentuate that mechanism of damage.
Erosion-corrosion is an important aspect of durability for materials used in the oilsands industry. The combination of a corrosive fluid and high volume of sand means that erosion, corrosion and their synergistic interactions all act to accelerate material damage. Material degradation rates are typically controlled by use of surface engineering or by use of hard alloys such as those studied in this paper. The high chromium Cast White Irons (CWIs) are an important class of material for components used for slurry handing apparatus in the oilsands process. In this paper results from an evaluation of corrosion and combined erosion-corrosion are reported. Erosion processes accelerate corrosion and the extent of the acceleration is dependent on the alloying of the CWI. However, it is found that the ranking of the three CWIs tested was common when assessing corrosion and combined erosion-corrosion degradation. The degradation in erosion-corrosion is primarily by matrix extrusion from a mechanical point of view. Corrosion processes act to accentuate that mechanism of damage.
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The objective of this study is to develop predictive wear model for dense slurry flow to narrow the gap left by extrapolation from models meant for more dilute sand conditions.

 
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