2O4組成,靠近外表面存在少量Fe3O4。這層Fe(Cr,Al)2O4膜可以阻礙金屬陽離子和氧離子在氧化膜內(nèi)的擴(kuò)散,進(jìn)而延緩Fe13Cr5Al4Mo合金的進(jìn)一步腐蝕。"/>

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Fe13Cr5Al4Mo合金在360 ℃、18.6 MPa LiOH水溶液中的腐蝕行為
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作者單位:

1.中廣核研究院有限公司 核燃料與材料研究所 深圳;2.上海大學(xué) 材料研究所 上海;3.上海大學(xué) 微結(jié)構(gòu)重點(diǎn)實(shí)驗(yàn)室 上海;4.上海大學(xué)材料研究所

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中圖分類號(hào):

TL341; TG146.4+14

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Corrosion Behavior of Fe13Cr5Al4Mo Alloy in Lithiated Water at 360 ℃、18.6 MPa
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The Key Laboratory for Advance Micro-Analysis,Shanghai University

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    摘要:

    采用靜態(tài)高壓釜研究了Fe13Cr5Al4Mo合金在360 ℃、18.6 MPa 70 μL/L LiOH水溶液中的腐蝕行為,以評(píng)估其在高溫高壓水環(huán)境中的耐腐蝕性能。采用SEM、TEM、EDS等研究了Fe13Cr5Al4Mo合金腐蝕后的氧化膜顯微組織及其演化行為。結(jié)果表明,Fe13Cr5Al4Mo合金在LiOH水溶液中表現(xiàn)為腐蝕失重,這與LiOH影響了Fe的氧化物溶解-再沉積過程有關(guān)。Fe13Cr5Al4Mo合金在LiOH水溶液中長(zhǎng)期腐蝕形成的氧化膜主要由Fe(Cr,Al)2O4組成,靠近外表面存在少量Fe3O4。這層Fe(Cr,Al)2O4膜可以阻礙金屬陽離子和氧離子在氧化膜內(nèi)的擴(kuò)散,進(jìn)而延緩Fe13Cr5Al4Mo合金的進(jìn)一步腐蝕。

    Abstract:

    The corrosion behavior of Fe13Cr5Al4Mo alloy in 70 μL/L LiOH aqueous solution at 360 °C,18.6 MPa was studied using a static autoclave to assess its corrosion resistance. The microstructure of the oxide film on the Fe13Cr5Al4Mo alloy after corrosion was investigated by SEM, TEM and EDS. The results show that the Fe13Cr5Al4Mo alloy exhibits corrosion weight loss in lithiated water, which is related to the dissolution-redeposition process of Fe oxide affected by LiOH. The oxide film formed on the alloy during the long-term corrosion in lithiated water is mainly composed of Fe(Cr,Al)2O4, and a small amount of Fe3O4 present near the outer surface. The Fe(Cr,Al)2O4 layer can hinder the diffusion of metal ions and oxygen ions within the oxide film, which in turn retards further corrosion of the alloy.

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馬海濱,王皓瑜,張文懷,林曉冬,薛佳祥,任啟森,廖業(yè)宏,胡麗娟,孫蓉蓉,梁 雪,李毅豐,姚美意. Fe13Cr5Al4Mo合金在360 ℃、18.6 MPa LiOH水溶液中的腐蝕行為[J].稀有金屬材料與工程,2024,53(7):2018~2024.[Ma HaiBin, Wang Haoyu, Zhang Wenhuai, Lin Xiaodong, Xue Jiaxiang, Ren QIsen, Liao Yehong, Hu Lijuan, Sun Rongrong, Liang Xue, Li Yifeng, YAO Meiyi. Corrosion Behavior of Fe13Cr5Al4Mo Alloy in Lithiated Water at 360 ℃、18.6 MPa[J]. Rare Metal Materials and Engineering,2024,53(7):2018~2024.]
DOI：10.12442/j. issn.1002-185X.20230289

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歷史
  • 收稿日期:2023-05-15
  • 最后修改日期:2023-07-06
  • 錄用日期:2023-07-28
  • 在線發(fā)布日期: 2024-07-22
  • 出版日期: 2024-07-12