Acta Metallurgica Sinica (English Letters) ›› 1993, Vol. 6 ›› Issue (7): 11-15.

• Research paper • Previous Articles     Next Articles

HOT CORROSION OF Ni_3Al-0.2B IN MOLTEN NaCl-(Na,K)_2SO_4

WU Weitao ZHANG Jianqing ZENG Chaoliu NIU Yan SHEN Weiliang Corrosion Science Laboratory,Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang,China Professor,Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang 110015,China   

  • Received:1993-07-11 Revised:1993-07-11 Online:1993-07-11 Published:2009-10-10

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Abstract: Hot corrosion of intermetallic compound Ni_3Al-0.2B was studied by electrochemical techniques combined with physical analyses.It was found that hot corrosion resistance of Ni_3Al-0.2B is rather inferior.Sulfidation-oxidation is responsible for the accelerated corrosion.The addition of 6at.-% Cr and 0.5at.-% Zr to Ni_3Al-0.2B may accelerate its corrosion.

Key words: Ni_3Al-0.2B, intermetallic compound, hot corrosion, electrochemistry

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