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Evaluation Of Scale And Corrosion Inhibitors Using A Jet Impingement Method

Picture for Evaluation Of Scale And Corrosion Inhibitors Using A Jet Impingement Method
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Product Number: 51321-16698-SG
Author: Hunter Thomson; David Nichols & Gordon M. Graham
Publication Date: 2021
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$20.00
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Scale and corrosion testing under high shear flow conditions, and selection of effective inhibitors, is of
increasing importance in oilfield production. Evaluation of inhibitors using an impinging jet technique to
generate high shear conditions is well-known with regard to corrosion, but has recently been adapted to
apply to inorganic scale processes. This paper demonstrates the utility of the technique in assessing
scale deposition and corrosion in the same system and under the same hydrodynamic conditions, and
the effect of inhibitors on the two processes.
The results illustrate scale and corrosion processes occurring simultaneously in the same system and
how these are affected by the system hydrodynamics. Both scale inhibitor and corrosion inhibitor
performance were found to be affected by the flow conditions with higher concentrations of each being
required as surface shear stress was increased. The impact of both types of inhibitor being present in
the system together was also investigated.
The jet impingement test method therefore provides an additional laboratory technique that can be
used to evaluate both scale deposition and corrosion under very high shear stresses that cannot be
readily achieved by alternative approaches. This work also highlights the importance of testing under
field representative conditions and advances the understanding of inhibitor performance in these
systems

Scale and corrosion testing under high shear flow conditions, and selection of effective inhibitors, is of
increasing importance in oilfield production. Evaluation of inhibitors using an impinging jet technique to
generate high shear conditions is well-known with regard to corrosion, but has recently been adapted to
apply to inorganic scale processes. This paper demonstrates the utility of the technique in assessing
scale deposition and corrosion in the same system and under the same hydrodynamic conditions, and
the effect of inhibitors on the two processes.
The results illustrate scale and corrosion processes occurring simultaneously in the same system and
how these are affected by the system hydrodynamics. Both scale inhibitor and corrosion inhibitor
performance were found to be affected by the flow conditions with higher concentrations of each being
required as surface shear stress was increased. The impact of both types of inhibitor being present in
the system together was also investigated.
The jet impingement test method therefore provides an additional laboratory technique that can be
used to evaluate both scale deposition and corrosion under very high shear stresses that cannot be
readily achieved by alternative approaches. This work also highlights the importance of testing under
field representative conditions and advances the understanding of inhibitor performance in these
systems

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The effect of fluid flow on corrosion, or flow accelerated corrosion, is defined by mass transfer and wall shear stress parameters existing in the water phase contacting the solid wall. Jet impingement offers an experimental method to measure the effect of these parameters on corrosion.
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