Characterization of high-temperature oxide films on dysprosium-doped Fe-20Cr alloys by electrochemical techniques

2012 ◽  
Vol 30 (11) ◽  
pp. 1150-1157 ◽  
Author(s):  
Pingyi GUO ◽  
Chaoliu ZENG ◽  
Yong SHAO ◽  
Zeshang QIN
Keyword(s):  
High Temperature ◽  
Electrochemical Techniques ◽  
Oxide Films ◽  
High Temperature Oxide ◽  
Temperature Oxide

EIS Study of High-Temperature Oxide Films on a Stainless Steel (253MA)- Influence of Alloying Elements

1998 ◽  
Vol 289-292 ◽  
pp. 1181-1192 ◽  
Author(s):  
J. Pan ◽  
C. Leygraf ◽  
T. Otsuka ◽  
R.F.A. Jargelius-Pettersson ◽  
Bo Ivarsson ◽  
...  
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Oxide Films ◽  
Alloying Elements ◽  
High Temperature Oxide ◽  
Temperature Oxide

scholarly journals Correlative 3D Characterization of High Temperature Oxide Scales on Co-Base Superalloys Using Nano-CT and FIB/SEM Tomography

2019 ◽  
Vol 25 (S2) ◽  
pp. 390-391
Author(s):  
Janis Wirth ◽  
Malte Lenz ◽  
Silvan Englisch ◽  
Jan Rosiwal ◽  
Nadine Buchinger ◽  
...  
Keyword(s):  
High Temperature ◽  
Oxide Scales ◽  
High Temperature Oxide ◽  
Temperature Oxide

Synthesis and characterization of a high-temperature oxide lubricant

1994 ◽  
Vol 29 (22) ◽  
pp. 5875-5879 ◽  
Author(s):  
J. S. Zabinski ◽  
A. E. Day ◽  
M. S. Donley ◽  
C. Dellacorte ◽  
N. T. McDevitt
Keyword(s):  
High Temperature ◽  
Synthesis And Characterization ◽  
High Temperature Oxide ◽  
Temperature Oxide

Influence of Oxidation Temperature on the High-Temperature Oxide Film Forming Behavior of T22 Heat-Exchange Tubes

2015 ◽  
Vol 1120-1121 ◽  
pp. 723-729
Author(s):  
Bao Shan Gu ◽  
Qiang Lu ◽  
Ji Yi Fu ◽  
Xiao Bao Yuan ◽  
Yan Wang ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
High Temperature ◽  
Heat Exchange ◽  
Oxide Film ◽  
Expansion Coefficient ◽  
Oxide Films ◽  
Forming Process ◽  
Film Forming ◽  
High Temperature Oxide ◽  
Temperature Oxide

In this study, without changing the whole manufacturing process of T22 coiled tubes, high-temperature oxide films are formed through atmosphere adjustment by taking advantages of the cooling process after stress elimination heat treatment. The corrosion resistance of T22 heat-exchange tubes is improved, which are used in the steam generators (SG) of high-temperature gas cooled reactors (HTR). The surface microscopic morphology of the oxide films is observed using a scanning electron microscope, and the structure of these films is characterized using an X-ray diffractometer. The stability of the high-temperature oxide film forming process is investigated using TG-DTG, as well as the thermal expansion coefficient of the films. The results prove that: (1) The oxide film generated at 550 °C is uniform and dense; (2) The oxide films formed at various holding temperatures are mainly consisted by Fe2O3 and Fe3O4. When the holding temperature is 550 °C, the content of Fe3O4 is the highest as 70.1%; (3) The films are stable when placed in inert atmosphere (N2) below 900 °C, and there is not any change in the composition and structure of the films even after reacting with steam at 550 °C for 24 h; (4) The expansion coefficient of high-temperature oxide films is very close to that of the matrix of the heat exchange tube, and the difference between these two thermal expansion coefficients is 5.3×10-9 mm/°C.

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