Effects of DBU, morpholine, and DMA on corrosion of low carbon steel exposed to steam
Source abstract
Abstract
Abstract Effects of morpholine, 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), and dimethylamine (DMA) on oxidation kinetics and oxide phase formation/transformation of AISI 1018 steel at 120 °C were evaluated. Low carbon steel samples were exposed to steam in an autoclave containing amine added aqueous solution at pH of 9.5 for 1, 2, 4, 6, 8, and 12 h. Control samples exposed to plain steam and amines showed the highest and lowest weight loss respectively. Fourier Transform Infrared Spectrophotometry (FTIR) showed that DBU containing steam favored formation of magnetite (Fe3O4) while steam with DMA formed more α and γ-FeOOH. Transformation of magnetite to hematite (α-Fe2O3) was fastest for morpholine. Analysis of oxides morphology was done utilizing Scanning Electron Microscopy (SEM). Oxides formed in plain or DMA containing steam exhibited acicular particles of goethite/hematite (α-FeOOH/α-Fe2O3) compared to DBU containing steam that showed equiaxed particles of magnetite/maghemite (Fe3O4/γ-Fe2O3). Morpholine containing steam promoted agglomeration of thin sharp platelets into coarse flakes of hematite.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Corrosion Behavior and Inhibition · Petroleum Processing and Analysis · Hydrogen embrittlement and corrosion behaviors in metals
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (23)
Show source-provided references
1. Advanced amines cut condensate corrosion
2. E. Klechka, Use of corrosion inhibitors on the trans Alaska pipeline, Materials Performance, January 2001.
3. S. Klimas, K. Fruzzetti, C. Turner, P. Balakrishnan, G. Strati , R. Tapping, Identification and testing of amines for steam generator corrosion and fouling control, in: ECI Conference on Heat Exchanger Fouling and Cleaning, Fundamentals and Applications, Santa Fe, NM, USA, 2003.
4. Thinking about heat exchanger fouling: a 5×5 matrix10.1080/01457638108939594 ↗
5. Crystallization mechanisms in solution10.1016/0022-0248(88)90294-1 ↗
6. Use of organic amines in water chemistry control for pressurized water reactor secondary systems10.1016/0149-1970(87)90007-2 ↗
7. C. Turner, S. Klimas, The effect of alternative amines on the rate of boiler tube fouling, EPRI report TR-108004, 1997.
8. Strategies in optimizing condensate return
9. B. Fellers, J. Stevens, G. Nichols, Strategic Elements of Steam Cycle Chemistry Control Practices at TXU’s Comanche Peak Steam Electric Station, CPSES, June 2001.
10. The application of infrared spectroscopy to a study of phosphoric and tannic acids interactions with magnetite (Fe3O4), goethite (α-FeOOH) and lepidocrocite (γ-FeOOH)10.1016/S0010-938X(97)00060-7 ↗
11. Passivation of iron and its cathodic reduction studied with a rotating ring-disk electrode10.1016/0010-938X(90)90176-6 ↗
12. Thermodynamic and kinetic causes of passivity10.1016/0013-4686(65)87029-3 ↗
13. Application of IR spectroscopy to study the rust systems10.1016/0010-938X(93)90092-U ↗
14. Formation of magnetite in the presence of ferric oxyhydroxides10.1016/S0010-938X(98)00045-6 ↗
15. Effects of amines on the formation of β-ferric oxide hydroxide10.1007/BF00541590 ↗
16. Morphology of rust phases formed on weathering steels during outdoor atmospheric in open, bold locations
17. Morphology of rust phases formed on weathering steels during outdoor atmospheric in sheltered locations
18. Morphology of oxide phases in the scales formed on steels
19. Bernal · Clay Mineral Bulletin · 1959 · 4 · 1510.1180/claymin.1959.004.21.02 ↗
20. C. Turner, C. Guzonas, and S. Kilmas, Identification and testing of amine for steam generator deposit control, EPRI report 1002773, 2002.
21. Influence of amine on formation and texture of uniform hematite particles10.1006/jcis.1996.0324 ↗
22. R. VarrinJr., Characterization of PWR steam generator deposits, EPRI report TR-106048, 1996.
23. S. Sagochka, Corrosion product transport, in: EPRI SGPM 2003 Steam Generator Secondary Side Management Conference, Savannah, GA, USA, (2003).