Inhibitors composition

Ammonium salts of alkenyl succinic half-amides have teen described for use as corrosion inhibitors in oil and gas production technology to combat corrosion by media containing CO2, H2S, and elemental sulfur [1366]. The inhibitor composition may contain a dispersing agent, such as a low molecular weight or polymeric anionic surfactant like an alkylsulfonic acid or an alkyl-aryl sulfonic acid. 

G. C. Fischer. Corrosion inhibitor compositions containing inhibitor prepared from amino substituted pyrazines and epoxy compounds. Patent US 4895702, 1990. 

Wilson, D.A. and Crump, D.K., Alkylene Phosphonic Acid Scale Inhibitor Compositions, U.S. Patent 4,540,508, 1985. 

Kramer, M. Corrosion inhibitor compositions for aqueous cooling systems of combustion engines. Ger. Offen. DE 2046791, 1971 Chem. Abstr. 1972, 76, 6013. 

If the pipelines are located in deep water or inaccessible places, maintenance and/or replacement of pipes and clean-up of oil spills is difficult and expensive. The use of expensive stainless steel or other alloys is not a viable solution due to the required capital costs, which are not economically feasible in many cases. Hence the strategy to combat corrosion problems is to use carbon steel pipes, but reduce and, if possible, prevent the rate of material losses. An important method of corrosion reduction practiced in the oil and gas industry is the use of corrosion inhibitors. The inhibitors act by bonding to the metal surface and forming a protective film. The performance of the inhibitor depends on the metal surface, the inhibitor composition, and fluid flow conditions. Some of the inhibitors are not effective because of the multiphase flow conditions in the pipelines. When selecting an inhibitor, it is essential to know its effectiveness in the specific service environment. Detailed knowledge of the metal surface conditions, the operating temperature and pressure, the fluid properties, the solution pH, and the multiphase flow conditions is essential. 

The effect of complex-forming reagents on the corrosion of metals was discussed in detail by Kuznetsov (1996). Complex formation plays an important role in the elementary act of metal dissolution. Thus metal cations passing into an electrolyte are always associated with solvent molecules, counter ions, or other components having free electron pairs. Many complexing agents, such as phosphonates, being easily soluble, can form complexes of various composition and may be not only mono- but also polynuclear. The latter are usually of low solubility and their formation can inhibit metal dissolution. Therefore adequate interpretation of the inhibition properties of phosphonates requires the study of the influence of complex formation on the inhibition effect of phosphonate based inhibitor compositions. 

Stamford AW, Gilbert EJ, Gumming JN (2012) Pyrrolidine-fused thiadiazine dioxide compounds as bace inhibitors, compositions, and their use. WO2012138590... 

Sinko, J., Hybrid pigment grade corrosion inhibitor compositions and procedures. 1999, WAYNE Pigment Corp. 

CookR. L. (TDA Research, Inc., Wheat Ridge, CO) (2005). Releasable corrosion inhibitor compositions. US patent application 6933046, 2005-Aug-23. 

R. L. Cook, Releasable corrosion inhibitor compositions . United States Patent 6,933,046,2005. 

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