Corrosion behavior of low-alloy steel containing 1% chromium in CO2 environments |
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Affiliation: | 1. School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia;2. State Key Lab for Corrosion and Protection, Institute of Metal Research, Shenyang, China |
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Abstract: | Corrosion behavior of low-alloy steel containing 1% Cr (1Cr) with normalized (ferritic–pearlitic) and quenched-and-tempered (tempered martensitic) microstructures was investigated in CO2 environments at 60 °C. The severe localized corrosion which was observed in N80 carbon steel, did not exist for 1Cr steel due to the formation of a compact and self-repairable Cr-rich scale. For 1Cr steel, the corrosion resistance with ferritic–pearlitic microstructure was better than that with tempered martensitic microstructure. An apparent corrosion scale spallation was observed on the surface of quenched-and-tempered 1Cr steel, while only slight scale spallation was seen for normalized 1Cr steel. |
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Keywords: | A Low alloy steel B Weight loss B SEM C Pitting corrosion |
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