Acta Metall Sin  1997, Vol. 33 Issue (10): 1035-1039    DOI:

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EFFECT OF NANOCRYSTALLIZATION ON THE CORROSION RESISTANCE OF K38G SUPERALLOY IN CO ATMOSPHERE

WANG Fuhui (Institute of Corrosion and Protection of Metals; Chinese academy of Sciences; Shenyang 110015) D.J.Young (School of Materials Science and Engineering; University of New South Wales; Sydney 2052; australia)

WANG Fuhui (Institute of Corrosion and Protection of Metals; Chinese academy of Sciences; Shenyang 110015) D.J.Young (School of Materials Science and Engineering; University of New South Wales; Sydney 2052; australia). EFFECT OF NANOCRYSTALLIZATION ON THE CORROSION RESISTANCE OF K38G SUPERALLOY IN CO ATMOSPHERE. Acta Metall Sin, 1997, 33(10): 1035-1039.

Abstract References Related Articles Recommended Metrics Download:  PDF(1824KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Corrosion resistance of the cast superalloy K38G and its sputtered nanocrystalline coating was investigated in CO in the temperature range 850-1000℃. The methods included thermogravimetric measurements, X-ray diffraction, and SEM with EDaX.The results indicated that the cast K38G alloy formed Cr2O3 and TiO2 scales, which followed parabolic rate law at any temperature in CO. The sputtered K38G nanocrystalline coating, however, formed al2O3 scale as a result of the enhancement of the selective oxidation of aluminium by nanocrystallization. The weight gain of the nanocrystalline coating is about 3-5 times Smaller than that of the cast alloy. Therefore nanocrystallization significantly improves the corrosion resistance of K38G superalloy. Key words:  corrosion      CO atmosphere      K38G alloy      nanocrystallization      Received:  18 October 1997      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/Y1997/V33/I10/1035 1 Wagner C. Z Elektrochem. 1959; 63: 772 2 Giggens C S ,Pettit F S. Trans Metall aIME 1969;245:2509 3 Yurek G J ,Eisen D,Garratt-Reed a.Metall Trans,1982;a13:473 4 Merz M D. 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