Insitu electrochemical impedance spectroscopy of PT-7 M and Fe-Ni-Cr alloys in chloride containing ammonia medium at high temperatures
Source abstract
Abstract
Corrosion of Titanium-based PT-7 M and Fe-Ni-Cr-alloy was investigated in chloride-containing ammonia at 288 °C at pH 288 °C7.23 and pH 288 °C 7.75. Oxide on Fe-Ni-Cr-alloy was compact compared to PT-7 M. EIS at 288 °C indicated lower metal loss for Fe-Ni-Cr -alloy. At lower pH, Fe-Ni-Cr exhibited an incubation period that is attributed to the adsorption of Cr-species. At lower pH, the metal loss was linear for PT-7 M, but repassivation occurred at higher pH. Pitting was not observed and the point defect-densities decreased at higher pH for both supporting a lower metal loss. Corrosion resistance of Fe-Ni-Cr-alloy matched that of the PT-7 M under the given conditions.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Corrosion Behavior and Inhibition · Hydrogen embrittlement and corrosion behaviors in metals · High-Temperature Coating Behaviors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (41)
Show source-provided references
1. Small Power and Heat Generation Systems on the Basis of Propulsion and Innovative Reactor Technologies, International Atomic Energy Agency, Vienna, 2000. 〈https://www.iaea.org/publications/6012/small-power-and-heat-generation-systems-on-the-basis-of-propulsion-and-innovative-reactor-technologies〉.
2. Control of spring back for helically coiled steam generator tube10.1016/j.nucengdes.2004.07.005 ↗
3. Influence of ammonia on the corrosion behavior of Ti−Al−Zr alloy in 360°C water10.1007/BF03027822 ↗
4. Corrosion of titanium alloys in pressurised water at 300 °C: Kinetics and modelling10.1016/j.corsci.2021.109646 ↗
5. Corrosion of titanium alloys in pressurised water at 350 °C and 17.5 MPa10.1016/j.corsci.2022.110268 ↗
6. Oxide formation on titanium alloys in primary water of nuclear pressurised water reactor10.1016/j.corsci.2019.01.020 ↗
7. B.K. Choi, T.K. Kim, Y.H. Jeong, D.J. Lee, M.H. Chang, Corrosion characteristics of PT-7M and PT-3V titanium alloys in ammonia water chemistry, 2001. 〈https://inis.iaea.org/search/search.aspx?orig_q=RN:33040390〉 (accessed May 25, 2022).
8. B.K. Choi, T.K. Kim, Y.H. Jeong, D.J. Lee, M.H. Chang, Corrosion characteristics of PT-7M and PT-3V titanium alloys in ammonia water chemistry, in: Proc. Korean Nucl. Soc. Spring Meet., KNS, Korea, Republic of, 2001: p. ONECDROM. 〈http://inis.iaea.org/search/search.aspx?orig_q=RN:33040390〉.
9. Experience with desalination plants containing titanium heat exchange tubing10.1016/S0011-9164(00)88391-5 ↗
10. R.W. Schutz, Utilizing titanium to successfully handle chloride process environments, in: 2002.
11. Corrosion of Titanium: Part 1: Aggressive Environments and Main Forms of Degradation
12. Corrosion of titanium and its alloys
13. Temperature dependence of crevice corrosion initiation on titanium grade-210.1149/1.1499501 ↗
14. Influence of ethanolamine on corrosion of alloy 690 in simulated secondary water10.1016/j.jmst.2014.09.022 ↗
15. Corrosion behavior for Alloy 690 and Alloy 800 tubes in simulated primary water10.1016/j.corsci.2012.10.018 ↗
16. Oxidation kinetics and mechanisms of Ni-base alloys in pressurised water reactor primary conditions: Influence of subsurface defects10.1016/j.corsci.2011.07.024 ↗
17. Pitting resistance of alloy 800 as a function of temperature and prefilming in high-temperature water10.5006/1.3280440 ↗
18. Pitting corrosion mechanism of alloy 800 in simulated crevice chemistries containing thiosulfate10.5796/electrochemistry.84.585 ↗
19. Cormet Testing Systems: Ag/AgCl electrode instruction manual., 2006.
20. External reference electrodes for use in high temperature aqueous systems10.1149/1.2129192 ↗
21. K.W. Sung, J.W. Na, Y.H. Cho, K.R. Kim, J.H. Ku, Basic research for nuclear energy Water chemistry technology development using advanced amines, Korea, Republic of, 1998.
22. J. Cobble & P. Turner, PWR advanced all-volatile treatment additives, by-products, and boric acid.EPRI Report, TR-100755, Palo Alto, CA., 1992.
23. Technical note: high-temperature ph of dilute ammonia and ammonium chloride solutions and mixtures with strong alkali10.5006/1.3583067 ↗
24. Electrochemistry of semiconductors
25. Electrochemical corrosion behavior of nanocrystallized bulk 304 stainless steel10.1016/j.electacta.2006.06.023 ↗
26. On the determination of the flat-band potential of a semiconductor in contact with a metal or an electrolyte from the Mott-Schottky plot10.1088/0022-3727/11/4/003 ↗
27. The passivity of titanium—part III: characterization of the anodic oxide film10.1007/s10008-019-04255-z ↗
28. A detailed TEM and SEM study of Ni-base alloys oxide scales formed in primary conditions of pressurized water reactor10.1016/j.jnucmat.2010.05.010 ↗
29. Photoelectrochemical study of nickel base alloys oxide films formed at high temperature and high pressure water10.1016/j.electacta.2010.04.063 ↗
30. Photoluminescence in TiO2 anatase single crystals10.1016/0038-1098(93)90427-O ↗
31. Note on the defect structure of rutile (TiO2)10.1016/0022-5088(67)90111-7 ↗
32. Electrical properties and defect chemistry of anatase (TiO210.1016/j.ssi.2005.11.002 ↗
33. Iron Passivity in Borate Buffer: Formation of a Deposit Layer and Its Influence on the Semiconducting Properties10.1149/1.1838311 ↗
34. Influence of the temperature of film formation on the electronic structure of oxide films formed on 304 stainless steel10.1016/S0013-4686(01)00658-2 ↗
35. Synthesis of Hydroxyl-Rich Anatase Nanocrystallites, Their Characterization and Performance as Photoanode in Dye-Sensitized Solar Cells10.1149/1.3271672 ↗
36. Growth and Raman spectroscopic characterization of TiO2 anatase single crystals10.1016/0022-0248(93)90842-K ↗
37. Interaction of magnesium ions in high temperature aqueous solution with Incoloy-800
38. Cation distribution in nanocrystalline cobalt substituted nickel ferrites: X-ray diffraction and Raman spectroscopic investigations10.1016/j.jpcs.2019.01.017 ↗
39. Pourbaix diagrams for the ternary system of iron-chromium-nickel10.5006/1.3283945 ↗
40. Elevated Temperature Potential-pH Diagrams for the Cr-H2O, Ti-H2O, Mo-H2O, and Pt-H2O Systems10.5006/1.3585993 ↗
41. Solubility behavior of titanium(IV) oxide in alkaline media at elevated temperatures10.1007/BF00646781 ↗