Acta Metall Sin  1994, Vol. 30 Issue (18): 247-253    DOI:

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ELECTROCHEMICAL IMPEDANCE OF HOT CORROSION OF SPUTTERED CoCrAlY COATING ON Ni_3Al And Ni_3Al－Fe INTERMETALLICS

ZENG Chaoliu; ZHANG Jianqing;WU Weitao; NIU Yan(Corrosion Science Lab Oratory; Institute of Corrosion and Protection of Metals; Chinese Academy of Sciences; Shenyang)

ZENG Chaoliu; ZHANG Jianqing;WU Weitao; NIU Yan(Corrosion Science Lab Oratory; Institute of Corrosion and Protection of Metals; Chinese Academy of Sciences; Shenyang). ELECTROCHEMICAL IMPEDANCE OF HOT CORROSION OF SPUTTERED CoCrAlY COATING ON Ni_3Al And Ni_3Al－Fe INTERMETALLICS. Acta Metall Sin, 1994, 30(18): 247-253.

Abstract References Related Articles Recommended Metrics Download:  PDF(500KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The electrochemical impedance combined with physical analysis techniques was employed to study the effect of sputtered CoCrAlY coating on hot corrosion of Ni3Al and Ni3Al-Fe intermetallics. It is shown that Ni3Al and Ni3Al-Fe suffer severe hot corrosion, and their Nyquist diagrams are composed of a semicircle at high frequency portion and a line at low frequency portion, which means the diffusion-controlled reaction.The Nyquist plots of sputtered CoCrAlY coating are composed of two capacitive loops, which means the pitting corrosion. Equivalent circuits to interprete the features of the impedance are proposed, and the parameters in the equivalent circuits are also calculated. Key words:  AC impedance      hot corrosion      Ni_3Al intermetallic compound      CoCrAlY coating      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1994/V30/I18/247 1MansfeldF,KendigM,TsaiS．Corrosion,1982;38:4782武成详,西方笃,水流切,武井厚．日本金属学会志,1992;56:11613LiuCT,DevereuxOF．JElectrochemSoc,1991;138:3864WuYM,RappRA．JElectrochemSoc,1991;138:26835张鉴清,曾潮流,牛焱,吴维．中国腐蚀与防护学报,1993;13:2746曾潮流,张鉴清,牛焱,吴维．腐蚀科学与防护技术,1993;5:2297牛焱,张鉴清,吴维．中国腐蚀与防护学报,1990;10:2218王佳,施存余,宋诗哲．中国腐蚀与防护学报,1989;9:129吴维,曾潮流,张鉴清．金属学报,1992;28:B298h [1] WANG Di, WANG Dong, XIE Guang, WANG Li, DONG Jiasheng, CHEN Lijia. Influence of Pt-Al Coating on Hot Corrosion Resistance Behaviors of a Ni-Based Single-Crystal Superalloy[J]. 金属学报, 2021, 57(6): 780-790. [2] Yimin LIAO, Min FENG, Minghui CHEN, Zhe GENG, Yang LIU, Fuhui WANG, Shenglong ZHU. Comparative Study of Hot Corrosion Behavior of theEnamel Based Composite Coatings and the ArcIon Plating NiCrAlY on TiAl Alloy[J]. 金属学报, 2019, 55(2): 229-237. [3] GAO Bo, WANG Lei, SONG Xiu, LIU Yang, YANG Shuyu, CHIBA Akihiko. Effect of Pre-Oxidation on High Temperature Oxidation and Corrosion Behavior of Co-Al-W-Based Superalloy[J]. 金属学报, 2019, 55(10): 1273-1281. [4] Chengyang JIANG, Yingfei YANG, Zhengyi ZHANG, Zebin BAO, Shenglong ZHU, Fuhui WANG. Preparation and Enhanced Hot Corrosion Resistance of aZr-Doped PtAl2+(Ni, Pt)Al Dual-Phase Coating[J]. 金属学报, 2018, 54(4): 581-590. [5] Xin PENG, Sumeng JIANG, Xudong SUN, Jun GONG, Chao SUN. CYCLIC OXIDATION AND HOT CORROSION BEHAVIORS OF A GRADIENT NiCoCrAlYSi COATING[J]. 金属学报, 2016, 52(5): 625-631. [6] JING Yanhong, LIU Enze, ZHENG Zhi, TONG Jian, Ning Likui, HE Ping. HOT CORROSION RESISTANCE OF FILLER ALLOY BCo46[J]. 金属学报, 2014, 50(1): 79-87. [7] QIN Lei, PENG Hui, GUO Hongbo, GONG Shengkai, XU Huibin. INTER-DIFFUSION BEHAVIOR OF RECOATED CoCrAlY COATING/DZ125 DIRECTIONALLY SOLIDIFIED SUPERALLOY[J]. 金属学报, 2013, 49(2): 229-235. [8] LU Xuyang, YU Daqian, JIANG Sumeng, LIU Shanchuan, GONG Jun, SUN Chao. HOT CORROSION BEHAVIOR OF A (NiCoCrAlYSiB+AlSiY) COMPOSITE COATING[J]. 金属学报, 2012, 48(4): 461-468. [9] ZHU Xiaoxi ZHANG Tianli JIANG Chengbao. ELECTROMECHANICAL COUPLING COEFFICIENT (K33) OF Fe72.5Ga27.5 MAGNETOSTRICTIVE ALLOY[J]. 金属学报, 2009, 45(4): 455-459. [10] LV Jiaxin; ZHENG Lei; ZHANG Maicang; DONG Jianxin. CORROSION BEHAVIOR OF NICKEL BASE ALLOY FGH95 IN MOLTEN NaCl–Na2SO4[J]. 金属学报, 2009, 45(2): 204-210. [11] NING Likui ZHENG Zhi TAN Yi LIU Enze TONG Jian YU Yongsi WANG Hua. STUDY ON HOT CORROSION RESISTANCE OF A NEW DIRECTIONAL SOLIDIFICATION Ni–BASED SUPERALLOY[J]. 金属学报, 2009, 45(2): 161-166. [12] YAN Wei SUN Fengjiu WANG Qingjiang LIU Jianrong CHEN Zhiyong LI Shaoqiang. HOT CORROSION BEHAVIOR OF ARC-ION PLATING Ti-Al-Cr(Si, Y) COATINGS ON Ti60 ALLOY[J]. 金属学报, 2009, 45(10): 1171-1178. [13] LIU Enze SUN Shunchen TU Ganfeng ZHENG Zhi NING Likui ZHANG Lingfeng . STUDY OF A NEW-TYPE HIGH STRENGTH Ni--BASED SUPERALLOY DZ68 WITH GOOD HOT CORROSION RESISTANCE[J]. 金属学报, 2009, 45(10): 1217-1224. [14] . Preparation Of High Temperature Proton Conductor Tube CaZr0.9In0.1O3-α And Its Properties[J]. 金属学报, 2008, 44(2): 177-182 . [15] . DEVELOPMENT OF A NEW HIGH STRENGTH AND GOOD HOT CORROSION RESISTANCE FOR LOW SEGREGATION SUPERALLOY DZ68[J]. 金属学报, 2007, 43(4): 422-426 . No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed