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Oligomeric Type Inhibitors Meeting a BroadSpectrum of Oilfield Corrosion Challenges

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The standard type of chemicals long used as oilfield corrosion inhibitors are so-called filmforming molecules carrying a positive net charge. More specifically, these additives belong to e.g. the classes fatty amines, alkoxylated fatty amines, amidoamines, imidazolines, pyridinium quats, and quarternary ammonium compounds like alkyl benzyl quats. Anionic molecules, predominantly phosphate esters, may sometimes also be used as stand-alone inhibitors or as enhancers in formulations with a base inhibitor of the abovementioned type.

Product Number: MECC23-19970-SG
Author: Per-Erik Hellberg
Publication Date: 2023
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Since some years back a new class of Oilfield corrosion inhibitors have been available on the market, oligomeric film-forming inhibitors. In contrast to the standard cationic surfactant type, these chemistries contain multiple positively charged hydrophilic headgroups. These aminebased inhibitors have proven to be broadly applicable, and compatibility studies have shown some of these active bases to be extremely flexible in formulation, allowing a wide range of corrosion inhibition solutions. Further, some of these novel products also fulfill North Sea environmental criteria for offshore application allowing use globally in environmentally restricted areas. The purpose of this paper is to outline and summarize the performance of this inhibitor class under different conditions and how these materials are meeting the diverse challenges connected to use in the oilfield area. This includes e.g. sweet and sour corrosion, severe brines and various compatibility issues.
Since some years back a new class of Oilfield corrosion inhibitors have been available on the market, oligomeric film-forming inhibitors. In contrast to the standard cationic surfactant type, these chemistries contain multiple positively charged hydrophilic headgroups. These aminebased inhibitors have proven to be broadly applicable, and compatibility studies have shown some of these active bases to be extremely flexible in formulation, allowing a wide range of corrosion inhibition solutions. Further, some of these novel products also fulfill North Sea environmental criteria for offshore application allowing use globally in environmentally restricted areas. The purpose of this paper is to outline and summarize the performance of this inhibitor class under different conditions and how these materials are meeting the diverse challenges connected to use in the oilfield area. This includes e.g. sweet and sour corrosion, severe brines and various compatibility issues.
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