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THE OXIDATION OF A TWO-PHASE Cu-50Cr ALLOY IN AIR AT 70O ─900℃ |
FU Guannyan;NIU Yan;WU Weitao (State Key Laboratory for Corrosion and Protection; Institute of Corrosion and Protection of Metals; The Chinese Academy of Sciences; Weucui Road 62; Shengyang 110015)(Department of Chemical Engineering and mechinery; Shenyang Institute of Chemical Technology; Shenyang110021) |
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Cite this article:
FU Guannyan;NIU Yan;WU Weitao (State Key Laboratory for Corrosion and Protection; Institute of Corrosion and Protection of Metals; The Chinese Academy of Sciences; Weucui Road 62; Shengyang 110015)(Department of Chemical Engineering and mechinery; Shenyang Institute of Chemical Technology; Shenyang110021). THE OXIDATION OF A TWO-PHASE Cu-50Cr ALLOY IN AIR AT 70O ─900℃. Acta Metall Sin, 1998, 34(2): 159-163.
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Abstract The two-phase Cu-50Cr alloy in air at 70─900℃ was corroded nearly parabolically, except at 900℃ when the instataneous parabolic rate constat decreased with time. The scales were consisted of an outer layer of copper oxide and an inner layer of a copper oxide or double oxide Cu2Cr2O4, in which the particles of chromiumare surrounded by chromia and the double Oxide Cu2Cr2O4. A nearly continuous Cr2O3 layer only appears at interface between the scale and matrix at 900℃. The formation of a continuous outer layer of chromia was more difficult on two-phase M-Cr alloy than single-phase M-Cr alloy.
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Received: 18 February 1998
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1Gesmundo F, Viani F, Niu Y. Oxid Met 1994; 42: 409 2 Gesmundo F, Viani F, Niu Y, Donglass D L. Oxid Met, 1993; 40: 373 3Gesmundo F, Viani F, Niu Y, Donglass D L.Oxid Met, 1994; 42: 465 4Gesmundo F, Vianid F, Niu Y. Oxid Met, 1996; 45: 51 5Kofastad R High Temperature Corrosion ,London and New York: Elsevier Applied Science, 1988: 389 6Chakrabarti D J,Laughlin D E. Bull Alloy Phase Diagrams,1984;5:59 7Gesmundo F, Viani F, Niu Y, Donglass D L. Oxid Met 1993; 39: 197 |
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