<strong>Zr-Sn-Nb</strong>包壳管腐蚀吸氢中氢浓度测算的截面金相法

doi:10.11902/1005.4537.2023.008

中国腐蚀与防护学报

2024, Vol. 44

Issue (1): 261-266 CSTR: 32134.14.1005.4537.2023.008 DOI: 10.11902/1005.4537.2023.008

研究报告

本期目录 | 过刊浏览

Zr-Sn-Nb包壳管腐蚀吸氢中氢浓度测算的截面金相法

马雁, 蓝宇宁(

), 陈嘉威

华北电力大学核科学与工程学院北京 102206

A Novel Cross-sectional Metallography Method for Determining Hydrogen Absorption Concentration and Hydrogen Absorption Amount of Zr-Sn-Nb Alloy Cladding Caused by High Temperature Water Corrosion

MA Yan, LAN Yuning(

), CHEN Jiawei

School of Nuclear Science and Engineering, North China Electric Power University, Beijing 102206, China

引用本文:

马雁, 蓝宇宁, 陈嘉威. Zr-Sn-Nb包壳管腐蚀吸氢中氢浓度测算的截面金相法[J]. 中国腐蚀与防护学报, 2024, 44(1): 261-266.
Yan MA, Yuning LAN, Jiawei CHEN. A Novel Cross-sectional Metallography Method for Determining Hydrogen Absorption Concentration and Hydrogen Absorption Amount of Zr-Sn-Nb Alloy Cladding Caused by High Temperature Water Corrosion[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(1): 261-266.

全文: PDF(3396 KB) HTML

摘要:

利用RH600/LECO定氢仪对Zr-Sn-Nb包壳管多个样品获取氢浓度的数据，结合样品横截面显微图像测量获取的氢化物面积分数的数据，推导出一种用于测算Zr-Sn-Nb包壳管中氢浓度的计算公式，即“截面金相法”。通过用文献中大量已知数据对该测算方法进行验证，结果表明，运用“截面金相法”测算出的氢浓度值准确度较高，与标称氢浓度值之间的误差< 6%。

关键词 ： Zr-Sn-Nb, 包壳管, 腐蚀吸氢, 截面金相法

Abstract：

Corrosion and hydrogen absorption of zirconium alloy cladding for PWRs is one of the main causes for cladding embrittlement and breakage failure. Therefore, rapid and accurate determination of hydrogen concentrations in zirconium alloys is of great importance to assess the integrity of the cladding. In this paper, we used the RH600/LECO hydrogen analyzer to measure the hydrogen concentration data for several samples of Zr-Sn-Nb cladding, meanwhile the corresponding data of hydrogenated area fraction were acquired by cross-sectional microscopic image measurements. On the bases of the two group of data, a formula was proposed to figure out the distribution of hydrogen concentrations in Zr-Sn-Nb cladding, namely the so called cross-sectional metallography method. This method was validated by using a large amount of known data from the existing literatures. The results showed that the hydrogen concentration values measured by the cross-sectional metallography method were highly accurate, and the error between the hydrogen concentration value and the nominal value is less than 6%.

Key words： Zr-Sn-Nb cladding hydrogen corrosion transverse metallographical method

收稿日期: 2023-01-13 32134.14.1005.4537.2023.008

ZTFLH:

TG172

基金资助:国家自然科学基金(12275083);国家科技重大专项(2019ZX06004009)

通讯作者: 蓝宇宁，E-mail：19897692662@163.com，研究方向为核反应堆材料

Corresponding author: LAN Yuning, E-mail: 19897692662@163.com

作者简介: 马雁，女，1973年生，博士，副教授

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https://www.jcscp.org/CN/10.11902/1005.4537.2023.008 或 https://www.jcscp.org/CN/Y2024/V44/I1/261

图1 不同氢浓度的Zr-Sn-Nb包壳管吸氢样品的金相组织形貌

图2 高温高压锆水反应腐蚀吸氢后Zr-Sn-Nb包壳管样品的XRD图

图3 高温高压锆水反应腐蚀吸氢后Zr-Sn-Nb包壳管中氢化物的TEM形貌像和选区衍射斑点

图4 氢化物体积分数F与面积分数f的关系

图5 含氢Zr-Sn-Nb合金包壳管的显微照片[8,21~23]

Micrograph	$W t H$ / μg·g^-1	Percentage error between $W t H$ and $W t H'$
Fig.5a	129.85	0.12%
Fig.5b	154.64	3.63%
Fig.5c	253.89	5.79%
Fig.5d	375.07	4.19%
Fig.5e	414.31	1.35%
Fig.5f	489.90	2.02%

表1 氢含量计算值及基于图5的误差分析

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