High Temperature Corrosion of Al3Ti-Cr Intermetallics in an Ar-1 %SO2 Gas Atmosphere

2008 ◽  
Vol 14 (3) ◽  
pp. 335-340 ◽  
Author(s):  
Dong-Bok Lee
Keyword(s):  
High Temperature ◽  
High Temperature Corrosion ◽  
Gas Atmosphere ◽  
So2 Gas

High Temperature Corrosion of Ti3AlC2 in Ar-1%SO2 Atmosphere

2007 ◽  
Vol 544-545 ◽  
pp. 343-346 ◽  
Author(s):  
Dong Bok Lee ◽  
Jee Hoon Choi
Keyword(s):  
High Temperature ◽  
Ternary Compound ◽  
Mixed Layer ◽  
High Temperature Corrosion ◽  
Tio2 Layer ◽  
Gas Atmosphere ◽  
Α Al2o3 ◽  
So2 Gas

The layered, machinable ternary compound, Ti3AlC2, was corrosion-tested at 800, 900, and 1000oC under an Ar-1% SO2 gas atmosphere. The scale formed consisted primarily of TiO2 and α-Al2O3. As the corrosion progressed, the scale became thicker and developed into an outer TiO2 layer and an inner (TiO2,Al2O3)-mixed layer.

Effect of Cr on the High Temperature Corrosion of Al3Ti-Cr Alloys in SO2 Atmosphere

2007 ◽  
Vol 544-545 ◽  
pp. 247-250
Author(s):  
Jee Hoon Choi ◽  
Dong Bok Lee
Keyword(s):  
High Temperature ◽  
Oxide Scale ◽  
Barrier Layer ◽  
High Temperature Corrosion ◽  
Atomic Percent ◽  
Alloy Surface ◽  
Al Content ◽  
Gas Atmosphere ◽  
High Al Content ◽  
So2 Gas

Three types of L12-type Al3Ti-Cr alloys, of compositions 67Al-25Ti-8Cr, 66Al-24Ti- 10Cr, and 59Al-26Ti-15Cr in atomic percent, were corrosion tested at 900, 1000, and 1100oC in an Ar-1% SO2 gas atmosphere for up to 150 h. The alloys were resistant to corrosion because a thin Al2O3 barrier layer was formed on the alloy surface due to the high Al content in the alloys. Due to the very strong Al affinity for oxygen, virtually no sulfur was detected inside the oxide scale.

scholarly journals The Influence of CoNiCrAlY Addition on the High Temperature Corrosion Behavior of CrSi2 Alloy in an Air–Na2SO4–NaCl Gas Atmosphere

2012 ◽  
Vol 53 (9) ◽  
pp. 1627-1632 ◽  
Author(s):  
Toto Sudiro ◽  
Tomonori Sano ◽  
Shoji Kyo ◽  
Osamu Ishibashi ◽  
Masaharu Nakamori ◽  
...  
Keyword(s):  
High Temperature ◽  
Corrosion Behavior ◽  
High Temperature Corrosion ◽  
Gas Atmosphere

scholarly journals Microstructure and Chemical Composition of Fe-Cr Alloy Tempered in High Temperature and Atmosphere Containing Ar-SO2

2016 ◽  
Vol 61 (3) ◽  
pp. 1607-1612 ◽  
Author(s):  
A. Radziszewska ◽  
A. Kranzmann ◽  
I. Dörfel ◽  
M. Mosquera Feijoo ◽  
M. Solecka
Keyword(s):  
Stainless Steel ◽  
Phase Composition ◽  
High Temperature ◽  
Chemical Composition ◽  
Steel Surface ◽  
High Temperature Corrosion ◽  
Corrosion Process ◽  
Gas Atmosphere ◽  
Amorphous Zone ◽  
Scale Surface

AbstractThe paper presents the microstructure, chemical and phase composition of thin scale, obtained as a result of high-temperature corrosion of X20Cr13 stainless steel. Samples were exposed to gas atmosphere of the following composition: 0.25 vol.% of SO2and 99.75 vol.% of Ar at 600 °C for 5 h. As a consequence, thin compact scale was formed on steel surface. This scale consisted of three different zones. An amorphous zone was formed close to steel surface. Then, nanocrystalline zone could be observed. Finally, larger grains were formed during the corrosion process. The analysis of the chemical composition revealed higher concentration of chromium near steel surface. In contrast, to chromium, the content of iron, increased near the scale surface. It was found out that the (Cr, Mn, Fe)5O12phase appeared in the thin scale.

scholarly journals High-Temperature Corrosion of AlCrSiN Film in Ar-1%SO2 Gas

Coatings ◽  
2017 ◽  
Vol 7 (3) ◽  
pp. 44 ◽  
Author(s):  
Poonam Yadav ◽  
Dong Lee ◽  
Yue Lin ◽  
Shihong Zhang ◽  
Sik Kwon
Keyword(s):  
High Temperature ◽  
High Temperature Corrosion ◽  
So2 Gas

High Temperature SO2-Gas Corrosion of Ni-Cr-Co Base Superalloy between 800 and 1000°C

2011 ◽  
Vol 312-315 ◽  
pp. 451-454 ◽  
Author(s):  
Sang Hwan Bak ◽  
Dong Bok Lee
Keyword(s):  
High Temperature ◽  
Thermodynamic Stability ◽  
Oxidation Reaction ◽  
Scale Spallation ◽  
Entire Surface ◽  
Gas Atmosphere ◽  
Massive Scale ◽  
Gas Corrosion ◽  
So2 Gas ◽  
Base Superalloy

The Ni-base superalloy, INCONEL740, whose major alloying elements are 24.31 wt.%Cr-20 wt.%Co, was corroded in an Ar-0.2%SO2-gas atmosphere between 800 and 1000oC for 50, and 100 hr in an electric furnace. The scales formed after SO2-gas corrosion tests were generally adherent at 800 and 900oC. At 1000oC, massive scale spallation however occurred over the entire surface. The scales consisted of Cr2O3, (Ni,Co)Cr2O4, and TiO2, indicating that not sulfidation but an oxidation reaction prevailed owing to the thermodynamic stability of concerning oxides.

Experimental Study on Gas Atmosphere near Side Walls of Swirl Opposed Supercritical Boiler

2013 ◽  
Vol 732-733 ◽  
pp. 116-119
Author(s):  
Xing Sen Yang ◽  
Xin Gang Zhou
Keyword(s):  
High Temperature ◽  
Corrosion Test ◽  
Side Wall ◽  
Experimental System ◽  
High Temperature Corrosion ◽  
Test Area ◽  
Reducing Atmosphere ◽  
Gas Atmosphere ◽  
Co Concentration ◽  
Side Walls

High temperature corrosion of metal material was found on the side water-walls of a swirl-opposed firing supercritical boiler. The gas atmosphere near the side wall has great relationship with the high temperature corrosion. Test holes were installed on the side walls to form an experimental system. The gas compositions near the side walls were analyzed under different combustion conditions. High CO concentration is detected near the side walls. The effects of the operation states of burners on the CO concentration near side walls were tested. High over-fire air quantity results in strong reducing atmosphere of the test area. The adjusting method to control the atmosphere is suggested.

High-Temperature Corrosion of Ti-46Al-6Nb-0.5 W-0.5Cr-0.3Si-0.1C Alloy in Ar/0.2%SO2 Gas

2020 ◽  
Vol 94 (1-2) ◽  
pp. 113-125
Author(s):  
Junhee Hahn ◽  
Shi Yuke ◽  
Seong Woong Kim ◽  
Seung Eon Kim ◽  
Xiao Xiao ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Corrosion ◽  
So2 Gas
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