Hastelloy C276 Coiled Tubing for CCUS

Carbon capture, utilization, and storage (CCUS) is a core technology for achieving industrial decarbonization globally. During the geological storage phase of carbon dioxide, the conditions in injection wells are exceptionally harsh. When supercritical carbon dioxide reacts with formation water, it creates a highly concentrated acidic medium. If the formation contains hydrogen sulfide and chloride ions, this will cause severe corrosion damage to conventional metal tubing.
Faced with these extreme chemical conditions, Hastelloy C276 coiled tubing offers a scientifically sound and reliable solution. C276 is a nickel-chromium-molybdenum alloy fortified with tungsten. Materials engineering tests have demonstrated that this alloy’s pitting resistance equivalent number exceeds 45. Experimental data from the Society of Corrosion Engineers (SCE) indicates that in high-temperature, high-pressure, hydrogen sulfide-containing acidic environments, the annual corrosion rate of C276 remains stable at less than 0.025 millimeters. It effectively resists localized corrosion and stress corrosion cracking.

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