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      SCI SCIE SCOPUS

      Effect of pressure on the corrosion and carburization behavior of chromia-forming heat-resistant alloys in high-temperature carbon dioxide environments

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      https://www.riss.kr/link?id=A107442967

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      Chromia-forming heat-resistant alloys were corroded in atmospheric CO<SUB>2</SUB> (0.1MPa) and supercritical-CO<SUB>2</SUB> (S-CO<SUB>2</SUB>, 10 and 20MPa) at 550-650<SUP>o</SUP>C for 1000h. The weight gain and the extent of an amorphous C layer at the oxide/matrix interface increased with increasing CO<SUB>2</SUB> pressure from 0.1MPa to 20MPa, but the increase was mostly less than a factor of 2. Despite the huge difference in the test pressure, the depth of the carburized region with Cr-rich carbides was rarely affected for Alloy 800HT, resulting in similar tensile properties after corrosion in CO<SUB>2</SUB> and S-CO<SUB>2</SUB>.
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      Chromia-forming heat-resistant alloys were corroded in atmospheric CO<SUB>2</SUB> (0.1MPa) and supercritical-CO<SUB>2</SUB> (S-CO<SUB>2</SUB>, 10 and 20MPa) at 550-650<SUP>o</SUP>C for 1000h. The weight ...

      Chromia-forming heat-resistant alloys were corroded in atmospheric CO<SUB>2</SUB> (0.1MPa) and supercritical-CO<SUB>2</SUB> (S-CO<SUB>2</SUB>, 10 and 20MPa) at 550-650<SUP>o</SUP>C for 1000h. The weight gain and the extent of an amorphous C layer at the oxide/matrix interface increased with increasing CO<SUB>2</SUB> pressure from 0.1MPa to 20MPa, but the increase was mostly less than a factor of 2. Despite the huge difference in the test pressure, the depth of the carburized region with Cr-rich carbides was rarely affected for Alloy 800HT, resulting in similar tensile properties after corrosion in CO<SUB>2</SUB> and S-CO<SUB>2</SUB>.

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