无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ
环境∙健康∙安全

含硼水溶液上方蒸汽对奥氏体不锈钢的腐蚀行为

  • 魏丁丁 ,
  • 仲剑初 ,
  • 宁桂玲
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  • 1.大连理工大学精细化工国家重点实验室,辽宁大连116024
    2.辽宁省硼镁特种功能材料制备与应用技术工程实验室
魏丁丁(1993— ),女,硕士研究生,主要从事资源化工研究;Email: 2540829787@qq.com

收稿日期: 2021-04-06

  网络出版日期: 2022-03-14

基金资助

国家自然科学基金辽宁联合基金项目(U1808210)

Corrosion behavior of austenitic stainless steel exposed to the vapor above boron-containing solution

  • Dingding WEI ,
  • Jianchu ZHONG ,
  • Guiling NING
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  • 1. State Key Laboratory of Fine Chemicals,Dalian University of Technology,Dalian 116024,China
    2. Engineering Laboratory of Boric and Magnesic Functional Material Preparative and Applied Technology

Received date: 2021-04-06

  Online published: 2022-03-14

摘要

硼酸应用广泛,其对设备腐蚀不容忽视。针对核电站含硼水溶液循环体系中设备顶端腐蚀的实际情况,取304奥氏体不锈钢为研究对象,研究了在给定温度和一定硼浓度水溶液存在下,溶液上方含硼水蒸气对奥氏体不锈钢的腐蚀行为,并将其与相应的溶液腐蚀对比。采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)和X射线光电子能谱仪(XPS)分析了试样表面氧化膜。结果表明:在180 ℃下腐蚀1 200 h后,304不锈钢在含硼水蒸气中的腐蚀程度高于相应含硼水溶液的腐蚀程度;尽管两种环境中的试样表面均形成了双层氧化膜,但在含硼水蒸气中形成的氧化膜表层富铁镍,而在含硼水溶液中形成的氧化膜表层富铬,并用氧化膜形成机理解释了此现象。

本文引用格式

魏丁丁 , 仲剑初 , 宁桂玲 . 含硼水溶液上方蒸汽对奥氏体不锈钢的腐蚀行为[J]. 无机盐工业, 2022 , 54(2) : 85 -89 . DOI: 10.19964/j.issn.1006-4990.2021-0225

Abstract

With the widespread use of boric acid,the corrosion problem of equipments exposed to boric acid-containing medi-um cannot be ignored.Based on the actual situation of the equipment tip corrosion in the boron-containing solution circulating system of nuclear power plant,the corrosion behavior of 304 austenitic stainless steel exposed to the vapor above boron-con-taining solution at a given temperature and a certain boron concentration was studied,and contrasting the vapor phase corro-sion with the corresponding solution corrosion was also discussed.The oxide films formed on the surface of specimens were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS).The result indicated that the corrosion of 304 stainless steel exposed to boron-containing vapor was more serious than that exposed to boron-containing solution at 180 ℃ when the corrosion test was carried out for 1 200 h.In spite of forming double-layer oxide films on the samples in both boron-containing vapor and solution,it was noted that the surface layer of the oxide film formed in boron-containing vapor was rich in Fe and Ni,while the surface layer of the oxide film formed in boron-containing solution was rich in Cr.This phenomenon was elucidated by the formation mechanism of oxide film.

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