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Can Micelles Be Used To Expedite And Enhance Laboratory Qualification Testing?

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The prevention of internal corrosion remains a significant challenge during the production of oil and gas. The use of film forming corrosion inhibitors is an important and cost-effective means of protecting assets from corrosion. These chemicals operate by forming a protective layer between the corrosive species present in the produced fluids and the pipe surface.

Product Number: 51322-17824-SG
Author: Scott Rankin, Andy Osnowski, Emma Perfect
Publication Date: 2022
Industries: Corrosion Monitoring and Control , Coatings and Linings
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$20.00
$20.00

The formation of corrosion inhibitor micelles in produced water can be used as an indicator of optimal dosage in a system. Prior to field use, tests are conducted in the laboratory on the relevant corrosion inhibitor, ideally in the presence of field hydrocarbon and other production chemicals. This ensures that the chemical and system are suitable and gives confidence that micelles will be detected, if present. During this pre-deployment testing, a corrosion inhibitor concentration series is created to determine the critical micelle concentration (CMC), i.e. the concentration at which micelles form for a given system. Other information is also provided, such as partitioning and potential influence of production chemicals on micelle formation.

Lab qualification testing of corrosion inhibitors require significant time, instrumentation, and skilled staff. Work has been conducted to determine if micelles can provide a higher throughput for compatibility testing so that more chemicals can be tested in the same timeframe, for the same cost; initial results are shown. The relationship between CMC and the field dose ultimately chosen is also considered. The usefulness of this approach, as a complementary qualification tool to those already used, is discussed in the context of being one that enables higher throughput testing and allows more chemicals to be screened for a more comprehensive and quicker process.

The formation of corrosion inhibitor micelles in produced water can be used as an indicator of optimal dosage in a system. Prior to field use, tests are conducted in the laboratory on the relevant corrosion inhibitor, ideally in the presence of field hydrocarbon and other production chemicals. This ensures that the chemical and system are suitable and gives confidence that micelles will be detected, if present. During this pre-deployment testing, a corrosion inhibitor concentration series is created to determine the critical micelle concentration (CMC), i.e. the concentration at which micelles form for a given system. Other information is also provided, such as partitioning and potential influence of production chemicals on micelle formation.

Lab qualification testing of corrosion inhibitors require significant time, instrumentation, and skilled staff. Work has been conducted to determine if micelles can provide a higher throughput for compatibility testing so that more chemicals can be tested in the same timeframe, for the same cost; initial results are shown. The relationship between CMC and the field dose ultimately chosen is also considered. The usefulness of this approach, as a complementary qualification tool to those already used, is discussed in the context of being one that enables higher throughput testing and allows more chemicals to be screened for a more comprehensive and quicker process.

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