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| CORROSION BEHAVIOUR OF Ni-13Cr-O.SCe ALLOY IN Cl_2-H_2O GASEOUS MIXTURE AT 575℃ |
| Tu Jiangping; Li Zhizhang; Mao Zhiyuan(Zhejiang University) |
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Abstract This paper describes the chlorination of Ni-13Cr-0.5Ce alloy in Cl2-H2O gaseous mixture at 575℃.The reaction product films were examined by SEM, XRD and XPS. There were Cl2, HCI, H2O, O2 and HOCl in the gaseous environment. The corrosion products consisted of volatile chlorides, oxychloride and oxides. Addition of Ce tO Ni-Cr alloy improved the overall corrosion resistance because of the formation of stable oxides but increased the depths of internal chlorination. The reaction rate followed approximately the parabolic law until the product film reached a steady thickness after which there was a linear decrease in weight change with time. The corrosion rate of Ni-Cr-Ce alloy in the ined Cl2-H2O(g) atmosphere was greater than that in dry chlorine.
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Received: 25 February 1995
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| 1LeeSY,MaNallanMJ．Corrosion,1991;47:8682JacobsonNS．Oxid．Metals;1986,26:1573涂江平,毛志远,李志章·中国腐蚀与防护学报,1994,14(1):874ThesslerRE,StachJIMetzDM．JElectrochem．Soc,1977,124:6075FortⅢWC．Corrosion//85,Boston:NACE,1985,PaperNo．126SmialekJL．Metall．Thans,1987,18A:1647TedthomonCS．J．Elertrochem．Soc,1966,113:7668MoonDF．Oxid．Metals,1989,32:47 |
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