Intergranular Corrosion Resistance of Σ3 Grain Boundaries in Alloy 22

被引：30
作者：
Jakupi, P. [1 ]
Noel, J. J. [1 ]
Shoesmith, D. W. [1 ]
机构：
[1] Univ Western Ontario, Dept Chem, London, ON N6A 3K7, Canada
来源：
ELECTROCHEMICAL AND SOLID STATE LETTERS | 2010年 / 13卷 / 03期
关键词：
chromium alloys; corrosion resistance; electrodes; electron backscattering; grain boundaries; molybdenum alloys; nickel alloys; tungsten alloys; CREVICE CORROSION; CHARACTER-DISTRIBUTION; STAINLESS-STEELS; NICKEL; SENSITIZATION; BEHAVIOR; PHASE;
D O I：
10.1149/1.3272851
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Alloy 22 electrodes crevice corroded under constant current conditions in 5 M NaCl at 120 degrees C accumulated damage predominantly in the form of intergranular corrosion. Electron backscatter diffraction was used to determine the relationship between the location of damage and the crystallographic features of the grains and grain boundaries. The alloy possessed an exceptionally high number of "special" (Sigma 3) grain boundaries, and an intergranular attack was observed on random grain boundaries not exhibiting this special grain boundary character. The high percentage of special boundaries offers one reason for the excellent crevice corrosion resistance of this alloy.
引用
收藏
页码：C1 / C3
页数：3
相关论文
共 27 条
[1]   STRUCTURE OF HIGH-ANGLE GRAIN BOUNDARIES [J].
BRANDON, DG .
ACTA METALLURGICA, 1966, 14 (11) :1479-&
[2]  
Chan LH, 2009, CERAM TRANS, V201, P261
[3]   Effect of simulated groundwater chemistry on stress corrosion cracking of alloy 22 [J].
Chiang, K. T. ;
Dunn, D. S. ;
Cragnolino, G. A. .
CORROSION, 2007, 63 (10) :940-950
[4]   Using electrochemical methods to determine alloy 22's crevice corrosion repassivation potential [J].
Evans, KJ ;
Yilmaz, A ;
Day, SD ;
Wong, LL ;
Estill, JC ;
Rebak, RB .
JOM, 2005, 57 (01) :56-61
[5]   F.N. Speller Award Lecture:: Corrosion considerations related to permanent disposal of high-level radioactive waste [J].
Gordon, GM .
CORROSION, 2002, 58 (10) :811-825
[6]   Competitive effects of metal dissolution and passivation modulated by surface structure: An AFM and EBSD study of the corrosion of alloy 22 [J].
Gray, J. J. ;
El Dasher, B. S. ;
Orme, C. A. .
SURFACE SCIENCE, 2006, 600 (12) :2488-2494
[7]   ELECTROCHEMICAL-BEHAVIOR AND ITS RELATION TO COMPOSITION AND SENSITIZATION OF NICRMO ALLOYS IN ASTM G-28 SOLUTION [J].
HEUBNER, UL ;
ALTPETER, E ;
ROCKEL, MB ;
WALLIS, E .
CORROSION, 1989, 45 (03) :249-259
[8]  
JAKUPI P, IN PRESS
[9]  
Jakupi P., 2007, ECS Trans, V3, P259
[10]   Intergranular corrosion of nickel alloys (review) [J].
Kasparova, OV .
PROTECTION OF METALS, 2000, 36 (06) :524-532
123