Amide is a common intermediate used in the formulation of corrosion inhibitors for various applications in oil and gas production fields. In many cases, due to its oil solubility nature of the amide, it is often used to form a film on metal surfaces to mitigate corrosion. In this work, ethoxylated amides with varying moles of Ethylene Oxide (EO) were synthesized to study the impact of ethoxylation on water solubility, water partitioning as well as corrosion inhibition performance under specific test conditions. The laboratory test results showed an improvement on water solubility and water partitioning of the amides after ethoxylation. From both the corrosion performance tests and secondary property assessments it was found that there was an optimized degree of ethoxylation, dependent on application and physicochemical property requirements. Additionally, the chemical properties, including an increased molecular weight, of certain type of ethoxylated amides demonstrated an enhanced bioaccumulation profile of the intermediate.

Subject
Water, Corrosion rate, Metal surfaces, Autoclaves, Adsorption, Solubility, Partitioning, Bubbling, Amide, Corrosion inhibitors, Brines, Corrosion protection, Corrosion coupons
Keywords:
Amide ethoxylation, corrosion inhibitor intermediate, water solubility, water partitioning
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2025
Association for Materials Protection and Performance (AMPP)
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