SULFIDATION BEHAVIOR OF FE-CO-CR-AL-Y ALLOYS CONTAINING REFRACTORY-METALS

被引：10
作者：
DU, HL
DATTA, PK
GRAY, JS
STRAFFORD, KN
机构：
[1] Surface Engineering Research Group, University of Northumbria at Newcastle, Newcastle upon Tyne
[2] Department of Metallurgy, University of South Australia
来源：
CORROSION SCIENCE | 1994年 / 36卷 / 01期
关键词：
D O I：
10.1016/0010-938X(94)90112-0
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The corrosion behaviour of three Fe-Co-Cr-Al-Y-X (where X = V and Nb)-type alloys has been studied in a sulphur-bearing atmosphere (pS2 approximately 10(-1) Pa and pO2 approximately 10(-18) Pa) at 750-degrees-C. Weight change data revealed protective kinetics and followed a parabolic rate law. The alloys containing higher levels of V and Nb showed better corrosion resistance. Replacement of Co by Fe improved the sulphidation behaviour. Analysis of the exposed specimens by means of SEM, EDAX and XRD demonstrated that the scales formed were duplex in nature. The outer layer of the scale mainly consisted of sulphides of Fe and Cr(Fe3S4, Co9S8 and Cr3S4). The inner layer principally containing sulphides of V, Nb and Cr was compact, adherent and protective, and substantially resisted the outward diffusion of the base alloying elements.
引用
收藏
页码：99 / 112
页数：14
相关论文
共 15 条
[1]  
BIEGUN T, 1981, B ACAD POL SCI-CHIM, V29, P69
[2]   HIGH-TEMPERATURE SULFIDATION BEHAVIOR OF NI-NB ALLOYS [J].
CHEN, MF ;
DOUGLASS, DL ;
GESMUNDO, F .
OXIDATION OF METALS, 1989, 31 (3-4) :237-263
[3]  
DATTA PK, 1991, IN PRESS 1ST AUSTR I
[4]   SULFIDATION OF SOME MCRALYX-TYPE ALLOYS [J].
DU, HL ;
DATTA, PK ;
GRAY, JS ;
STRAFFORD, KN .
OXIDATION OF METALS, 1993, 39 (1-2) :107-135
[5]  
DU HL, 1991, THESIS NEWCASTLE POL
[6]   EFFECT OF NB ON THE HIGH-TEMPERATURE SULFIDATION BEHAVIOR OF COBALT [J].
GLEESON, B ;
DOUGLASS, DL ;
GESMUNDO, F .
OXIDATION OF METALS, 1989, 31 (3-4) :209-236
[7]  
JENKINSON D, 1983, THESIS NEWCASTLE POL
[8]   KINETICS AND MECHANISM OF HIGH-TEMPERATURE SULFUR CORROSION OF FE-CR-AL ALLOYS [J].
MROWEC, S ;
WEDRYCHOWSKA, M .
OXIDATION OF METALS, 1979, 13 (06) :481-504
[9]   SULFIDATION PROPERTIES OF FE-CR ALLOYS AT 1073 K IN H2S-H2 ATMOSPHERES OF SULFUR PRESSURES 10(-2) AND 10(-5) PA [J].
NARITA, T ;
SMELTZER, WW ;
NISHIDA, K .
OXIDATION OF METALS, 1982, 17 (5-6) :299-314
[10]   SULFIDATION PROPERTIES OF AN FE-23.4CR-18.6AL ALLOY AT TEMPERATURES 1073-K AND 1173-K IN H2S-H2 ATMOSPHERES OF SULFUR AT PRESSURES 10(4)-10(-5)PA [J].
NARITA, T ;
PRZYBYLSKI, K ;
SMELTZER, WW .
OXIDATION OF METALS, 1984, 22 (3-4) :181-200
12