Abstract
In this study, Cu-Ni-Si alloy was subjected to corrosion resistance tests under simulated high-temperature, high-pressure H2S and Cl− environments. The corrosion rates, electrochemical performance, surface morphologies, and chemical compositions of the Cu-Ni-Si alloy after corrosion were analyzed by the mass loss method, electrochemical impedance spectroscopy, scanning electron microscopy, energy-dispersive x-ray spectrometry, and x-ray diffraction. The results showed that, at the initial stage of corrosion, because of the loose corrosion product layer initially formed on the surface, a high corrosion rate was observed for the Cu-Ni-Si alloy under high-temperature, high-pressure environments. With the progress of corrosion, the corrosion rate gradually decreased and reached a steady state. Because at the later stage, a passive film was formed on the alloy surface, further inhibiting the corrosion of the alloy and improved its corrosion resistance. The Cu-Ni-Si alloy exhibited good corrosion resistance under high-temperature, high-pressure H2S and Cl− environments.
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The authors acknowledge the financial support of the National Key Research and Development Program (No. 2016YFB0300700); National Natural Science Foundation (Nos. 51609133 and 5162195); and the China Postdoctoral Science Foundation (No. 2017M620153).
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Shen, Y., Dong, Y., Li, H. et al. Corrosion Resistance of Cu-Ni-Si Alloy Under High-Temperature, High-Pressure H2S and Cl− Environments. J. of Materi Eng and Perform 28, 1040–1048 (2019). https://doi.org/10.1007/s11665-018-3663-5
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DOI: https://doi.org/10.1007/s11665-018-3663-5