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Cr對(duì)Zr-0.3Cu合金在360 ℃/18.6 MPa/0.01 M LiOH水溶液中腐蝕行為的影響
作者:
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(diǎn)實(shí)驗(yàn)室

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基金項(xiàng)目:

國家自然科學(xué)基金資助(項(xiàng)目號(hào)No.52001192和51901123)


Effect of Cr on corrosion behavior of Zr-0.3Cu alloy in 360 °C/18.6 MPa/ 0.01 M LiOH aqueous solution
Author:
Affiliation:

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

Fund Project:

The National Natural Science Foundation of China

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    摘要:

    通過制備Zr-0.3Cu-xCr（x=0.2，0.5，1.0，wt.%）合金，并在360 ℃/18.6 MPa/0.01 M LiOH水溶液中進(jìn)行高壓釜腐蝕實(shí)驗(yàn)，研究了Cr對(duì)Zr-0.3Cu合金腐蝕行為的影響。結(jié)果表明，隨Cr含量增加，Zr-0.3Cu-xCr中的ZrCr2第二相數(shù)量增多，而Zr2Cu第二相數(shù)量無明顯變化。在360 ℃/18.6 MPa/0.01 M LiOH水溶液中，Zr-0.3Cu-0.2Cr合金的耐腐蝕性能較好，可能與氧化膜/基體界面較厚的ZrO過渡層和基體內(nèi)較少的第二相有關(guān)。然而，當(dāng)Cr含量超過0.5 wt.%時(shí)，由于合金中第二相數(shù)量增多，氧化時(shí)產(chǎn)生的缺陷較多，Zr-0.3Cu-xCr合金腐蝕加劇。

    Abstract:

    Zr-0.3Cu-xCr (x=0.2, 0.5, 1.0, wt.%) alloys were prepared to investigate the effect of Cr on the corrosion behavior of Zr-0.3Cu alloy in 360 ℃/18.6 MPa/0.01 M LiOH aqueous solution. The results showed that with the increase of Cr content, the number of ZrCr2 secondary phase particles (SPPs) increased, while the number of Zr2Cu SPPs were nearly unchanged. After exposure to the aqueous solution, the corrosion resistance of Zr-0.3Cu-0.2Cr alloy was relatively high compared to other alloys probably due to the thick ZrO transition layer at the oxide/matrix interface. When the Cr content was higher than 0.5 wt.%, the number of SPPs increased, which can generate more defects like micropores and microcracks during oxidation, and consequently, accelerate the corrosion of Zr-0.3Cu-xCr alloys.

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范周洋,林曉冬,張革,張弛,李毅豐,梁雪,彭劍超,李強(qiáng). Cr對(duì)Zr-0.3Cu合金在360 ℃/18.6 MPa/0.01 M LiOH水溶液中腐蝕行為的影響[J].稀有金屬材料與工程,2023,52(1):167~178.[FAN Zhouyang, LIN Xiaodong, ZHANG Ge, ZHANG Chi, LI Yifeng, LIANG Xue, PENG Jianchao, LI Qiang. Effect of Cr on corrosion behavior of Zr-0.3Cu alloy in 360 °C/18.6 MPa/ 0.01 M LiOH aqueous solution[J]. Rare Metal Materials and Engineering,2023,52(1):167~178.]
DOI：10.12442/j. issn.1002-185X.20211104

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  • 收稿日期:2021-12-11
  • 最后修改日期:2022-02-17
  • 錄用日期:2022-03-07
  • 在線發(fā)布日期: 2023-02-13
  • 出版日期: 2023-02-08