Abstract
The effect of a surface deposit of NaCl on the oxidation characteristics of a high-temperature titanium alloy was studied in the temperature range of 400–600°C. The influence of the water vapor content in the oxidizing environment was examined in the light of an existing electrochemical mechanism proposed for the hot-salt stress-corrosion-cracking phenomenon found in titanium alloys. It was established that the NaCl deposit increased the oxidation rate by a factor of 100 for hygrometry levels of 10 ppm or higher. Further, there exists a hygrometry threshold between 10 and 5×10−3 ppm below which the NaCl-induced accelerated oxidation decreases with decreasing hygrometry level. Electron microprobe analysis suggests that the titanium matrix reacts with chlorine before forming rutile.
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References
V. C. Petersen,J. Met. 40 (Apr. 1971).
R. Garfinkle,Met. Trans. 4, 1477 (1973).
P. Kofstad,High Temperature Oxidation of Metals (John Wiley & Sons; New York, 1966), p. 170.
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The authors are indebted to the Société Nationale d'Etudes et de Construction de Moteurs d'Aviation (S.N.E.C.M.A.) for its financial support of this study.
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Dumas, P., John, C.S. NaCl-induced accelerated oxidation of a titanium alloy. Oxid Met 10, 127–134 (1976). https://doi.org/10.1007/BF00614242
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DOI: https://doi.org/10.1007/BF00614242