The influence of Nb on hot corrosion behavior of Ni-based superalloy at 800 °C in a mixture of Na2SO4-NaCl

被引：21
|
作者：
Weng, Fei [1 ]
Yu, Huijun [2 ]
Wan, Kai [1 ]
Chen, Chuanzhong [1 ]
机构：
[1] Shandong Univ, Dept Mat Sci & Engn, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China
[2] Shandong Univ, Sch Mech Engn, Key Lab High efficiency & Clean Mech Manufacture, Minist Educ, Jinan 250061, Shandong, Peoples R China
来源：
JOURNAL OF MATERIALS RESEARCH | 2014年 / 29卷 / 21期
关键词：
HIGH-TEMPERATURE CORROSION; SINGLE-CRYSTAL SUPERALLOYS; FE-BASED SUPERALLOYS; OXIDATION BEHAVIOR; MECHANICAL-PROPERTIES; SO2-O2; ATMOSPHERES; NI-5AL COATINGS; AL-ALLOY; 900-DEGREES-C; RESISTANCE;
D O I：
10.1557/jmr.2014.282
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
New-type Ni-based superalloys with and without Nb were designed in this study. Their hot corrosion behaviors were investigated at 800 degrees C with the deposition of a mixture of Na2SO4 and NaCl. The corrosion kinetics was studied by thermogravimetry. Microstructure of the corrosion scales was studied by SEM and the phase constituent was analyzed by XRD. Results showed that the corrosion kinetics followed approximately parabolic law. The corrosion scales on the two Ni-based alloys were comprised of Cr2O3, Al2O3, TiO2, and NiCr2O4. NiO was only detected in the scale on alloy without Nb. Nb2O5 appeared with the addition of 2.0 wt% Nb. No sulfide emerged in the scales. The corrosion scales both exhibited a layered structure. With Nb addition, the hot corrosion resistance of the alloy was notably improved. The action mechanism of Nb was investigated extensively in this study.
引用
收藏
页码：2596 / 2603
页数：8
相关论文
共 50 条
  • [31] Influence of micro-structure on corrosion behavior of a Ni-based superalloy in 3.5% NaCl
    Liu, Li
    Li, Ying
    Wang, Fuhui
    ELECTROCHIMICA ACTA, 2007, 52 (25) : 7193 - 7202
  • [32] Influence of Nb on the Hot Corrosion Behaviors of a Fe-Cr-Ni Heat-Resistant Steel Weld Metal in the Na2SO4-NaCl Molten Salt at 700?
    Zhang, Xu
    Wan, Jinchu
    Zhu, Liang
    Zhou, Hui
    Yang, Zonghui
    METALS AND MATERIALS INTERNATIONAL, 2023, 29 (12) : 3645 - 3654
  • [33] Comparing the hot corrosion of (100), (210) and (110) Ni-based superalloys exposed to the mixed salt of Na2SO4-NaCl at 750 °C: Experimental study and first-principles calculation
    Wei, Boxin
    Chen, Chunjin
    Xu, Jin
    Yang, Lanlan
    Jia, Yixuan
    Du, Yao
    Guo, Mingxiao
    Sun, Cheng
    Wang, Zhenyao
    Wang, Fuhui
    CORROSION SCIENCE, 2022, 195
  • [34] Effect of pre-oxidation on hot corrosion of Ni-Cr-Al alloy in molten Na2SO4-NaCl
    Hara, M
    Okumura, H
    Nakagawa, T
    Sato, Y
    Shinata, Y
    JOURNAL OF THE JAPAN INSTITUTE OF METALS, 1995, 59 (12) : 1259 - 1265
  • [35] Hot corrosion and electrochemical behavior of NiCrAlY, NiCoCrAlY and NiCoCrAlYTa coatings in molten NaCl-Na2SO4 at 800°C
    Wang, Jiahao
    Li, Dangguo
    Shao, Tianmin
    SURFACE & COATINGS TECHNOLOGY, 2022, 440
  • [36] Effect of pre-oxidation on hot corrosion of Ni-Cr-Al alloy in molten Na2SO4-NaCl
    Hara, Motoi
    Okumura, Hirobumi
    Nakagawa, Tokiko
    Sato, Yoshiyuki
    Shinata, Yutaka
    Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, 1995, 59 (12): : 1259 - 1265
  • [37] Investigation on the hot corrosion behavior of a single crystal Ni-based superalloy in molten Na2SO4+K2SO4 salts improved by different preoxidation treatments
    Yang, Xiaowen
    Yang, Lanlan
    Wang, Jinlong
    Chen, Zehao
    Chen, Minghui
    Zhang, Jianqiang
    Wang, Fuhui
    CORROSION SCIENCE, 2023, 221
  • [38] Performance of cold spray coatings on Fe-based superalloy in Na2SO4-NaCl environment at 900 °C
    Kalsi, Sukhminderbir Singh
    Sidhu, T. S.
    Singh, H.
    SURFACE & COATINGS TECHNOLOGY, 2014, 240 : 456 - 463
  • [39] HOT CORROSION OF MECHANICAL ALLOY MA 754 INDUCED BY Na2SO4-NaCl MIXTURES.
    Nishi, Yoshizumi
    Shinata, Yutaka
    Araki, Yoichi
    Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, 1983, 69 (09): : 1198 - 1205
  • [40] Hot Corrosion Performance of Single-Crystal CMSX-4 and CMSX-486 Superalloys in the Mixture of Na2SO4-NaCl Melts
    Oluwasegun, K. M.
    Ajide, O. O.
    Tanaka, T.
    Zhang, L.
    Ojo, O. A.
    JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 2019, 28 (09) : 5509 - 5520
12345