High temperature corrosion and electrochemical behavior of INCONEL 625 weld overlay in PbSO4–Pb3O4–PbCl2–CdO–ZnO molten salt medium

2014 ◽  
Vol 85 ◽  
pp. 60-76 ◽  
Author(s):  
E. Mohammadi Zahrani ◽  
A.M. Alfantazi
Keyword(s):  
High Temperature ◽  
Molten Salt ◽  
Electrochemical Behavior ◽  
High Temperature Corrosion ◽  
Inconel 625 ◽  
Salt Medium ◽  
Weld Overlay

Electrochemical Studies on High-Temperature Corrosion of Silicon-Iron Coatings and Iron Aluminide Intermetallic Alloys by Molten Salts

CORROSION ◽  
2001 ◽  
Vol 57 (6) ◽  
pp. 489-496 ◽  
Author(s):  
M. Amaya ◽  
J. Porcayo-Calderon ◽  
L. Martinez
Keyword(s):  
High Temperature ◽  
Molten Salt ◽  
Electric Power ◽  
Molten Salts ◽  
Corrosion Current ◽  
High Temperature Corrosion ◽  
Iron Aluminide ◽  
Fuel Oil ◽  
Silicon Iron ◽  
Salt Corrosion

Abstract The performance of Fe-Si coatings and an iron aluminide (FeAl) intermetallic alloy (FeAl40at%+0.1at%B+10vol%Al2O3) in molten salts containing vanadium pentoxide (V2O5) and sodium sulfate (Na2SO4) is reported. Corrosion and fouling by ash deposits containing V2O5 and Na2SO4 are typical corrosion problems in fuel oil-fired electric power units. High-temperature corrosion tests were performed using both electrochemical polarization and immersion techniques. The temperature interval of this study was 600°C to 900°C, and the molten salts were 80wt%V2O5-20wt%Na2SO4. Curves of corrosion current density vs temperature obtained by the potentiodynamic studies are reported, as well as the weight loss vs temperature curves from molten salt immersion tests. Both Fe-Si coatings and FeAl40at%+0.1at%B+10vol%Al2O3 showed good behavior against molten salt corrosion. The final results show the potential of these coatings and alloys to solve the high-temperature corrosion in fuel oil-fired electric power units.

High Temperature Corrosion Studies in Molten Salt Using Salt Purification and Alloy Coating

2016 ◽  
Vol 59 (3) ◽  
pp. 242-257 ◽  
Author(s):  
S.S. Sawant ◽  
B.D. Gajbhiye ◽  
S. Tyagi ◽  
C.S. Sona ◽  
R. Divya ◽  
...  
Keyword(s):  
High Temperature ◽  
Molten Salt ◽  
Alloy Coating ◽  
High Temperature Corrosion ◽  
Corrosion Studies

High temperature corrosion studies in molten salt-FLiNaK

2013 ◽  
Vol 49 (4) ◽  
pp. 287-295 ◽  
Author(s):  
C. S. Sona ◽  
B. D. Gajbhiye ◽  
P. V. Hule ◽  
A. W. Patwardhan ◽  
C. S. Mathpati ◽  
...  
Keyword(s):  
High Temperature ◽  
Molten Salt ◽  
High Temperature Corrosion ◽  
Corrosion Studies

Effects of bubbles on high-temperature corrosion of helium ion-irradiated Ni-based alloy in fluoride molten salt

2017 ◽  
Vol 125 ◽  
pp. 184-193 ◽  
Author(s):  
Hanliang Zhu ◽  
Rohan Holmes ◽  
Tracey Hanley ◽  
Joel Davis ◽  
Ken Short ◽  
...  
Keyword(s):  
High Temperature ◽  
Molten Salt ◽  
High Temperature Corrosion ◽  
Helium Ion

High Temperature Corrosion of Spray-Atomized FeAl (40at.%) Based Alloys:Immersed in a Molten Salt Mixture of V2O5-Na2SO4

1998 ◽  
Vol 552 ◽  
Author(s):  
M. Amaya ◽  
E. J. Lavernia ◽  
L. Martinez
Keyword(s):  
Weight Loss ◽  
High Temperature ◽  
Molten Salt ◽  
Passive Layer ◽  
High Temperature Corrosion ◽  
Electrochemical Technique ◽  
Salt Mixture ◽  
Protective Oxide ◽  
Metal Base ◽  
Temperature Range

ABSTRACTWe studied the high temperature corrosion of spray atomized and deposited FeAl40at% based intermetallic alloys immersed in a molten salt mixture of 80%V2O 5+20%Na2SO4 (wt%) over the temperature range of 600–900°C. Experiments were realized by the weight loss method and the potentiodynamic polarization electrochemical technique in three different samples: FeA140at%, FeA140+0.lat%B and FeA140+0.lat%B+10at%A12O3. Measurements of weight loss and corrosion current density as a function of the molten salts temperature were obtained and discussed in terms of the passive layer morphology and corrosion products formed during the tests. It was found that the iron aluminide doped with boron and reinforced with alumina particulate was more corrosion resistant in the test temperature range. The weight loss experiments revealed that at 700°C all alloys developed maximum corrosion rate. This behavior was related with the dissolution of protective oxide layer on metal base due the formation of vanadate phases which are highly corrosive at this temperature.

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