复合夹杂物对铁素体不锈钢腐蚀行为的影响  

Effect of Composite Inclusions on Corrosion Behavior of Ferritic Stainless Steel

作　　者：卢华兴 隗健 李高盛 韩盈 余伟 席烨廷 LU Huaxing;WEI Jian;LI Gaosheng;HAN Ying;YU Wei;XI Yeting(National Power Investment Group Hydrogen Energy Technology Development Co.,Ltd.,Beijing 102209,China;Shandong Advanced Materials Institute Co.,Ltd.,Jinan Shandong 250102,China;National Electric Power Investment Group Science and Technology Research Institute Co.,Ltd.,Beijing 102209,China;Institute of Engineering Technology,Beijing University of Science and Technology,Beijing 102206,China)

机构地区：[1]国家电投集团氢能科技发展有限公司,北京102209 [2]山东产研先进材料院有限公司,山东济南250102 [3]国家电投集团科学技术研究院有限公司,北京102209 [4]北京科技大学工程技术研究院,北京102206

出　　处：《上海金属》2023年第3期75-82,共8页Shanghai Metals

摘　　要：采用电化学测试、热力学计算、光学显微镜、扫描电子显微镜和能谱分析等方法,研究了复合夹杂物对含Zr和含Nb两种铁素体不锈钢腐蚀行为的影响。结果表明:含Zr不锈钢中主要为TiN包裹ZrC的复合夹杂物,含Nb不锈钢中主要为NbC包裹TiN的复合夹杂物,这与Thermo-Calc软件计算的夹杂物析出情况一致。含Nb不锈钢的耐蚀性能明显优于含Zr不锈钢,这主要是由于(Zr/Nb,Ti)(C/N)夹杂物为腐蚀源头,含Zr不锈钢中此类夹杂物的数量明显多于含Nb不锈钢。此外,Cu和Cr含量提升也是含Nb不锈钢的耐蚀性能优于含Zr不锈钢的原因之一。Effects of composite inclusions on the corrosion behavior of two kinds of ferritic stainless steels containing Zr or Nb were studied by electrochemical test,thermodynamic calculation,optical microscope,scanning electron microscope and energy spectrum analysis.The results showed that the composite inclusions of ZrC surrounded by TiN were dominant in Zr-containing stainless steel,and the composite inclusions of TiN surrounded by NbC were dominant in Nb-containing stainless steel,which was consistent with the precipitation of inclusions calculated by Thermo-Calc software.The corrosion resistance of Nb-containing stainless steel was obviously better than that of Zrcontaining stainless steel,which was mainly because the(Zr/Nb,Ti)(C/N)inclusions were the source of corrosion,and the number of such inclusions in Zr-containing stainless steel was significantly more than that in Nb-containing stainless steel.In addition,the increase in contents of Cu and Cr was also one of the reasons why the corrosion resistance of Nb-containing stainless steel was better than that of Zr-containing stainless steel.

关 键 词：铁素体不锈钢 复合夹杂物 电化学 腐蚀行为 

分 类 号：TG172[金属学及工艺—金属表面处理]