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Corrosion In Dense Slurry And Models Performance

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Slurry pipeline systems are used for the extraction of bitumen from mined ore in the oil sands industry in Alberta, Canada. Most of these extraction processes are open to atmosphere resulting in significant air ingress and entrainment within the slurry pipelines used to transport mined ore and tailings. In addition, for short hydrotransport slurry pipelines, the slurry is conditioned by air to create bubbles coated with a bitumen film called “air-sacks”.

Product Number: 51322-17743-SG
Author: Kofi Freeman Adane, Aaron Fuhr
Publication Date: 2022
Industries: Corrosion Monitoring and Control , Coatings and Linings , Coatings
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A linear polarization resistance probe was used to study corrosion rates in oil sands dense slurries. The study was conducted in a pilot-scale horizontal slurry flow loop with nine test conditions evaluated. Slurry consisted of a bimodal (sand and rocks) particle distribution mixed with municipal water. The sand had a median size, d50 of approximately 0.776 mm and spread (d90 / d10) ratios in the range of 2.5 to 3.5. The rocks ranged in size from 6 to 12 mm (0.25 to 0.5 inches). The study was done in a 193.7 mm (7.625 inch) carbon steel pipe flow loop with mixture velocity and solids concentration of 4.5-7.0 m/s and 19.3-29.1 v/v%, respectively. The oxygen was injected to achieve a dissolved oxygen concentration of 1.0 ppm to 11.7 ppm. The measured corrosion rates were used to validate five existing corrosion rate models. The interaction of slurry flow characteristics and corrosion is a complex phenomenon and poses a significant challenge for any modeling attempts. Nonetheless, several findings in this work can be leveraged for corrosion predictions. The slurry effect on corrosion was not linear but depended highly on slurry flow regime, fines content, dissolved oxygen concentration, and local solids concentration and velocity distributions. In general, most existing models either overestimated or underestimated corrosion rates, with a couple showing some promise for further evaluation.

A linear polarization resistance probe was used to study corrosion rates in oil sands dense slurries. The study was conducted in a pilot-scale horizontal slurry flow loop with nine test conditions evaluated. Slurry consisted of a bimodal (sand and rocks) particle distribution mixed with municipal water. The sand had a median size, d50 of approximately 0.776 mm and spread (d90 / d10) ratios in the range of 2.5 to 3.5. The rocks ranged in size from 6 to 12 mm (0.25 to 0.5 inches). The study was done in a 193.7 mm (7.625 inch) carbon steel pipe flow loop with mixture velocity and solids concentration of 4.5-7.0 m/s and 19.3-29.1 v/v%, respectively. The oxygen was injected to achieve a dissolved oxygen concentration of 1.0 ppm to 11.7 ppm. The measured corrosion rates were used to validate five existing corrosion rate models. The interaction of slurry flow characteristics and corrosion is a complex phenomenon and poses a significant challenge for any modeling attempts. Nonetheless, several findings in this work can be leveraged for corrosion predictions. The slurry effect on corrosion was not linear but depended highly on slurry flow regime, fines content, dissolved oxygen concentration, and local solids concentration and velocity distributions. In general, most existing models either overestimated or underestimated corrosion rates, with a couple showing some promise for further evaluation.

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Corrosion Inhibitor Encapsulation For Enhanced Chemical Efficiency And Performance

Product Number: 51322-17548-SG
Author: Fang Cao, James Oxley, Yao Xiong, Satish Bodige, Dennis Schmatz
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Corrosion Inhibition Of Carbon Steel In Carbonate Acidizing At Elevated Temperature

Product Number: 51322-17562-SG
Author: Limin Xu, Tao Chen, Ming Han, Mohammed Bataweel
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A suitable acid package in matrix acidizing application is very important to the stimulation employed to improve the productivity of carbonate reservoirs. Typically, concentrated acids between 5 and 28 wt% are used and the most used mineral acid for carbonate acidizing treatment is hydrochloric acid (HCl) 1,2. A significant challenge of acidizing treatment is corrosion loss of metal tubulars due to the high reactivity of acid and metal, especially at high temperatures. Corrosion inhibitors are needed to reduce the corrosion loss of steel surface of facilities exposed in acidic environment.
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Corrosion Inhibition Of Automotive Parts In Water-Ethylene Glycol Solutions

Product Number: 51322-17593-SG
Author: Behzad Bavarian, Koushik Kosanam, Lisa Reiner
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The efforts to lower automotive component weight to make cars more fuel efficient has increased the demand for aluminum alloys. In these applications, substantial amounts of heat are generated due to engine combustion, making it necessary to cool the engine systems. Metals in an engine application will rely on coolant to transfer heat. Corrosion behavior is another consideration for metals. Aluminum alloys, similar to the metals they are replacing, are sensitive to corrosion, especially in an aqueous alkaline environment.
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