Effect of cerium addition on the corrosion behaviour of carbon-alloyed iron aluminides
Source abstract
Abstract
Abstract The effect of Ce addition on the microstructure and corrosion behavior of carbon-alloyed iron aluminides Fe–20.0Al–2.0C, Fe–18.5Al–3.6C and Fe–19.2Al–3.3C–0.07Ce (in at.%) has been studied. The potentiodynamic polarization behaviour of the alloys was evaluated in freely aerated 0.25 mol/l H 2 SO 4 . A 0.05% C steel was used for comparison purposes. All the alloys exhibited active–passive behaviour in the acidic solution. The addition of Ce destroyed passivity as indicated by lower breakdown potentials in polarization studies. This has been related to the finer distribution of the carbides in the microstructure. Corrosion rates were evaluated by immersion testing. The iron aluminide with Ce addition exhibited a lower corrosion rate compared to the aluminides without Ce addition. This has been attributed to modifications in surface film with Ce addition. Scanning electron microscopy of corroded surfaces indicated that the carbon-alloyed intermetallics were susceptible to localized galvanic corrosion due to the presence of carbides in the microstructure.
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Research context
OpenAlex topics: Intermetallics and Advanced Alloy Properties · High Temperature Alloys and Creep · High-Temperature Coating Behaviors
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References (29)
Show source-provided references
1. Ordered intermetallics
2. Ordered intermetallic alloys, part 1, nickel and iron aluminides
3. Environmental effects on room temperature ductility and fracture mode in Fe3Al alloys10.1016/0956-716X(90)90275-L ↗
4. An environmental effect as the major cause room temperature embrittlement in FeAl10.1016/0036-9748(89)90263-9 ↗
5. Direct evidence of hydrogen generation from the reaction of water with FeAl10.1016/S1359-6462(96)00316-8 ↗
6. Chromium addition and environmental embrittlement Fe3Al10.1016/0956-716X(90)90496-4 ↗
7. On the role of chromium in minimizing room temperature hydrogen embrittlement in iron aluminides10.1016/1359-6462(95)00495-5 ↗
8. Alloy development to minimize room temperature hydrogen embrittlement in iron aluminides10.1016/S0925-8388(96)02940-4 ↗
9. Ductility improvement of Fe3Al based alloys with surface coating10.1016/1359-6462(96)00252-7 ↗
10. Effect of recrystallisation on room temperature tensile properties of Fe3Al based alloy10.1016/0956-716X(93)90449-3 ↗
11. Superplasticity in Fe3Al–Ti alloy with large grains10.1016/0956-716X(94)90055-8 ↗
12. Effect of thermomechanical treatment on the room temperature mechanical behaviour of iron aluminide
13. Effect of alloying on aqueous corrosion and mechanical behaviour of iron aluminide Fe3Al10.1007/BF00355926 ↗
14. Mechanical behaviour of chromium and titanium alloyed iron aluminides with mischmetal addition10.1016/S1359-6462(97)00577-0 ↗
15. Effect of carbides on embrittlement of Fe3Al based intermetallic alloys10.1016/S1359-6462(96)00441-1 ↗
16. Effect of carbon contents on high temperature tensile properties of Fe3Al based intermetallic alloy10.1016/S1359-6462(96)00340-5 ↗
17. Effect of alloying on structure and mechanical properties of high carbon Fe–16wt.% Al alloy10.1016/S0921-5093(00)00832-7 ↗
18. Hydrogen trapping at carbide–matrix interfaces in Fe3Al–C intermetallics10.1016/S1359-6462(00)00602-3 ↗
19. Machinable iron aluminides containing carbon10.1016/S1359-6462(00)00583-2 ↗
20. Effect of carbon addition on hydrogen permeation in an Fe3Al-based intermetallic alloy10.1016/S0966-9795(01)00140-6 ↗
21. Mechanical properties of Fe3Al based alloys with Ce addition10.1016/0956-716X(95)00282-Z ↗
22. Kofstad · 1998
23. Electroslag remelting of Fe–28at.% Al intermetallic alloy
24. Rare earth–oxygen–sulfur reactions in molten steel
25. Effect of carbon on corrosion behaviour of Fe3Al intermetallics in 0.5N sulphuric acid10.1016/S0010-938X(01)00084-1 ↗
26. Corrosion of carbon-alloyed iron aluminides10.1007/BF02708390 ↗
27. Microstructural evolution in iron aluminide Fe–28Al–2C after high temperature hydrogen treatment10.1007/s11661-004-0087-7 ↗
28. The galvanic corrosion of SiC monofilament/ZE41 Mg metal–matrix composite in 0.5M NaNO310.1016/0010-938X(93)90014-8 ↗
29. A.K. Nigam, R. Balasubramaniam, S. Bhargava, R.G. Baligidad, Electrochemical impedance spectroscopy and cyclic voltammetry study of carbon-alloyed iron aluminides in sulfuric acid, Corros. Sci., 2005, accepted for publication.10.1016/j.corsci.2005.06.011 ↗