Acta Metall Sin  1996, Vol. 32 Issue (2): 197-201    DOI:

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HIGH TEMPERATURE HOT CORROSION OF NiAl-20%Fe WITH ITS SURFACE ALUMINIDE COATING

ZENG Chaoliu；WU Weitao(State Key Laboratory of Corrosion and Protection; Institute of Corrosion and Protection of Metals; Chinese Academy of Sciences; Shenyang 110015); GUO jianting(Institute of Metal Research; Chinese Academy of Sciences;Shenyang 110015)(Manuscript received 1995-06-05)

ZENG Chaoliu；WU Weitao(State Key Laboratory of Corrosion and Protection; Institute of Corrosion and Protection of Metals; Chinese Academy of Sciences; Shenyang 110015); GUO jianting(Institute of Metal Research; Chinese Academy of Sciences;Shenyang 110015)(Manuscript received 1995-06-05). HIGH TEMPERATURE HOT CORROSION OF NiAl-20%Fe WITH ITS SURFACE ALUMINIDE COATING. Acta Metall Sin, 1996, 32(2): 197-201.

Abstract References Related Articles Recommended Metrics Download:  PDF(385KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The behaviours of high temperature hot corrosion of NiAl, NiAl-20%Fe (atom fraction) without and with aluminized coating in the presence of Na_2SO_4 film at 950℃in air were conducted. NiAl alloy shows hot corrosion resistance to some extent by the formation of Al_2O_3 scale. But, the cracking and dissolution of Al_2O_3 scale may cause its rapid hot corrosion. Additives of 20%Fe may deteriorate the hot corrosion resistance owing to the absence of an Al_2O_3 scale. Aluminizing treatment may improve corrosion resistance of NiAl-20%Fe by promoting the formation of an Al_2O_3 scale. NiAl-20%Fe with aluminide coating has slower corrosion rate than NiAl alloy, which may be attributed to that the aluminide coating has higher Al content, and the Al_2O_3 scale in coating has better cracking resistance than NiAl alloy.(Correspondent: ZENG Chaoliu, Institute of Corrosion and Protection of Metals, Chinese Academy of Sciences,Shenyang 110015) Key words:  intermetallic compound      NiAl      NiAl-20%Fe      aluminide coating      Na_2SO_4      hot corrosion      Received:  18 February 1996      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/Y1996/V32/I2/197 1 VedulaK,PathaveV,Aslanidis I,TitranRH.MatResSocSympProc,1985;39:4112VedulaK,StephensJR,MatResSocSympProc,1987;81:3813RudyM,SanthoffG.MatResSocSymPProc,1985;39:3274GuhaS,MunroeRP,BakerI．MatResSocSympProc,1989;133:6335RybickiGC,SmialekJL.OxidMet,1989;32:2756GrabkeHJ,SteinhorstM,BrummM,WiemerD．OxidMet,1991;35:1997HindamHM,SmeltzerWW．JElectrochemSoc,1980;127:16308SmialekJL.MetTrans,1987;9A:309 [1] DING Zongye, HU Qiaodan, LU Wenquan, LI Jianguo. 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