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Calcium Carbonate Scale Deposition And Inhibition: Effects Of Corrosion Inhibitors

Product Number: 51321-16736-SG
Author: Qiwei Wang; Tawfiq Al-Shafai; Tao Chen; Sultan Alsubaie
Publication Date: 2021
$20.00
$20.00
$20.00

Scale and corrosion inhibitors are often applied simultaneously in order to prevent inorganic deposition and protect system integrity of oilfield facilities. The compatibility between these chemicals is a major concern during chemical selection. Corrosion inhibitor compounds may form complex with scale inhibitor molecules and interfere with the interactions of scale inhibitor and scaling crystal, and consequently, affect the scale inhibitor performance. Understanding their interplay is of importance for the development of cost effective treatment programs.
In this work, the impacts of corrosion inhibitors on calcium carbonate deposition and inhibition were investigated. Experiments were carried out using the dynamic tube blocking method at 85oC and 350 psi. Three scale inhibitors tested were, respectively, based on tri-phosphonate, penta-phosphonate, and polyacrylate; whilst three corrosion inhibitors were blend products of different active ingredients. Results attained in this study suggested that at 50 ppm of corrosion inhibitor concentration, its impact on the scale inhibitor performance was minimal. Test data also showed that, in the absence of scale inhibitor, the influence of corrosion inhibitors on the kinetics of calcium carbonate scale deposition was insignificant under the test conditions.

Scale and corrosion inhibitors are often applied simultaneously in order to prevent inorganic deposition and protect system integrity of oilfield facilities. The compatibility between these chemicals is a major concern during chemical selection. Corrosion inhibitor compounds may form complex with scale inhibitor molecules and interfere with the interactions of scale inhibitor and scaling crystal, and consequently, affect the scale inhibitor performance. Understanding their interplay is of importance for the development of cost effective treatment programs.
In this work, the impacts of corrosion inhibitors on calcium carbonate deposition and inhibition were investigated. Experiments were carried out using the dynamic tube blocking method at 85oC and 350 psi. Three scale inhibitors tested were, respectively, based on tri-phosphonate, penta-phosphonate, and polyacrylate; whilst three corrosion inhibitors were blend products of different active ingredients. Results attained in this study suggested that at 50 ppm of corrosion inhibitor concentration, its impact on the scale inhibitor performance was minimal. Test data also showed that, in the absence of scale inhibitor, the influence of corrosion inhibitors on the kinetics of calcium carbonate scale deposition was insignificant under the test conditions.

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