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Cu對Zr-1Sn-0.35Fe-0.15Cr-0.10Nb合金在400 ℃含氧過熱蒸汽中耐腐蝕性能的影響
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作者單位:

1.上海大學(xué)材料研究所;2.上海大學(xué)微結(jié)構(gòu)重點實驗室

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國家自然科學(xué)基金資助(項目號51871141)


Effect of Cu on Corrosion Resistance of Zr-1Sn-0.35Fe-0.15Cr-0.10Nb Alloy in 400 ℃ Oxygen-Contained Super-heated Steam
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Affiliation:

1.Institute of Materials,Shanghai University;2.Laboratory for Microstructures,Shanghai University

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    摘要:

    為了探究Cu對Zr-1Sn-0.35Fe-0.15Cr-0.10Nb（wt.%，下同）合金在400 ℃/1000 ppb含氧過熱蒸汽中耐腐蝕性能的影響。本文將Zr-1Sn-0.35Fe-0.15Cr-0.10Nb和Zr-1Sn-0.35Fe-0.15Cr-0.10Nb-0.05Cu合金樣品放入動態(tài)高壓釜中進行400 ℃/10.3MPa/1000 ppb含氧過熱蒸汽腐蝕試驗。采用掃描電子顯微鏡、透射電子顯微鏡和X射線光電子能譜儀等表征手段對氧化膜的顯微組織以及氧化膜中各元素的價態(tài)進行分析。結(jié)果表明：微量Cu的添加改善了Zr-1Sn-0.35Fe-0.15Cr-0.10Nb合金的耐腐蝕性能；Cu在氧化膜中主要以Cu和Cu+形式存在；Cu的添加會促進氧化膜中的Sn和Sn2+向Sn4+和Fe2+向Fe3+的轉(zhuǎn)化。從Cu的添加影響氧化膜中合金元素的氧化行為和抑制了氧化膜中孔隙和裂紋生成等角度探討了Cu改善Zr-1Sn-0.35Fe-0.15Cr-0.10Nb合金耐腐蝕性能的原因。

    Abstract:

    In order to explore the effect of Cu on the corrosion resistance of Zr-1Sn-0.35Fe-0.15Cr-0.10Nb (mass fraction, %) alloy in 400 ℃/1000 ppb oxygen-contained super-heated steam, Zr-1Sn-0.35Fe-0.15Cr-0.10Nb and Zr-1Sn-0.35Fe-0.15Cr-0.10Nb-0.05 alloy specimens were corroded in 400 ℃/10.3 MPa/1000 ppb oxygen-contained super-heated steam by a dynamic autoclave. The scanning electron microscope, transmission electron microscope, X-ray photoelectron spectroscope were used to characterize the microstructure of the oxide films and the valence state of the alloying element. The results show that the addition of Cu can improve the corrosion resistance of Zr-1Sn-0.35Fe-0.15Cr-0.10Nb alloy; Cu mainly exists in the form of Cu and Cu+ in the oxide film; Cu can promote the transformation of Sn and Sn2+ to Sn4+ and Fe2+ to Fe3+ in the oxide film; The reasons of Cu improving the corrosion resistance of Zr-1Sn-0.35Fe-0.15Cr-0.10Nb alloy are discussed from the aspects that the addition of Cu affects the oxidation behavior of alloying elements and inhibits the formation of pores and cracks in the oxide film.

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徐詩彤,白勇,姚美意,黃建松,胡麗娟,林曉冬,謝耀平,梁雪,彭劍超,周邦新. Cu對Zr-1Sn-0.35Fe-0.15Cr-0.10Nb合金在400 ℃含氧過熱蒸汽中耐腐蝕性能的影響[J].稀有金屬材料與工程,2023,52(6):2169~2175.[Xu Shitong, Bai Yong, Yao Meiyi, Huang Jiansong, Hu Lijuan, Lin Xiaodong, Xie Yaoping, Liang Xue, Peng Jianchao, Zhou Bangxin. Effect of Cu on Corrosion Resistance of Zr-1Sn-0.35Fe-0.15Cr-0.10Nb Alloy in 400 ℃ Oxygen-Contained Super-heated Steam[J]. Rare Metal Materials and Engineering,2023,52(6):2169~2175.]
DOI：10.12442/j. issn.1002-185X.20220439

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  • 收稿日期:2022-05-18
  • 最后修改日期:2022-06-16
  • 錄用日期:2022-07-12
  • 在線發(fā)布日期: 2023-07-07
  • 出版日期: 2023-06-30