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利用EBSD技術(shù)研究690合金在高溫高壓水環(huán)境中腐蝕行為
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北京科技大學(xué) 新材料技術(shù)研究院,蘇州熱工研究院電站壽命管理研究中心,北京科技大學(xué) 新材料技術(shù)研究院,北京科技大學(xué) 新材料技術(shù)研究院,北京科技大學(xué) 新材料技術(shù)研究院,陽江核電有限公司 儀控部

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TG172.82

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國家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）


Research on corrosion behavior of 690 alloy in high temperature and high pressure water environment using EBSD technology
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Institute for Advanced Materials and Technology，University of Science and Technology Beijing,Plant Life Management Research Center,Suzhou Nuclear Power Research Institute,Institute for Advanced Materials and Technology，University of Science and Technology Beijing,Institute for Advanced Materials and Technology，University of Science and Technology Beijing,Institute for Advanced Materials and Technology，University of Science and Technology Beijing,Maintenance Instrumentation Control Department，Yangjiang Nuclear Power Co.，Ltd

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    摘要:

    采用掃描Kelvin探針（SKP）和電子背散射衍射（EBSD）技術(shù)結(jié)合高溫高壓浸泡實(shí)驗(yàn)研究了兩種不同變形量的690合金的C型環(huán)樣品在浸泡后的電化學(xué)行為。結(jié)果表明：690合金在高溫高壓浸泡實(shí)驗(yàn)中生成Fe、Ni、Cr的腐蝕產(chǎn)物；EBSD檢測統(tǒng)計(jì)分析得25%變形量的690合金樣品Σ3晶界所占比例比50%變形量的690合金樣品所占比例多10%，均有輕微不同種類的織構(gòu)；掃描Kelvin探針測得浸泡后Ekp都有明顯的升高，25%變形量的690合金C型環(huán)樣品Ekp升高到-3.5 mV，而50%變形量的690合金C型環(huán)樣品Ekp升高到-29.2 mV，說明25%變形量的690合金表面生成的腐蝕產(chǎn)物膜保護(hù)性能更好。

    Abstract:

    Scanning Kelvin probe (SKP) and electron backscatter diffraction（EBSD）testing techniques, combined with high temperature and pressure immersion test were used to investigate the electrochemical corrosion behavior of C-type ring made by 690 alloy with different degrees of deformation. The results show that the corrosion products on the 690 alloy are composed of oxide particles which are rich in Fe、Ni and Cr. EBSD test statistics analysis shows that the proportion of Σ3 grain boundaries in 690 alloy with 25% deformation is 10% more than that of 690 alloy with 50% deformation, and both kinds of 690 alloy have mild but different texture. The SKP measurement results display that Ekp of C-type ring samples after immersion has a significant rise, reaching -3.5mV for 690 alloy with 25% deformation and -29.2mV for 690 alloy with 50% deformation respectively, which also indicates the corrosion products film on 690 alloy with 25% deformation plays a better protective role as it results in a higher Ekp (26mV higher than that of 690 alloy with 50% deformation).

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趙瑞濤,李成濤,李曉剛,程學(xué)群,張凱,袁佳梅.利用EBSD技術(shù)研究690合金在高溫高壓水環(huán)境中腐蝕行為[J].稀有金屬材料與工程,2016,45(11):2867~2872.[Zhao Ruitao, LI Chengtao, Li Xiaogang, Cheng Xuequn, Zhang Kai, Yuan Jiamei. Research on corrosion behavior of 690 alloy in high temperature and high pressure water environment using EBSD technology[J]. Rare Metal Materials and Engineering,2016,45(11):2867~2872.]
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  • 收稿日期:2014-08-26
  • 最后修改日期:2014-09-25
  • 錄用日期:2014-10-30
  • 在線發(fā)布日期: 2016-12-08
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