Preliminary Investigation of Effect of Environmental Factors on Salt Stress Corrosion Cracking of Ti8A1-1Mo-1V
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CENTER
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A preliminary experimental investigation was made on the effect of oxygen, moisture, pressure, surface condition, and salt composition on the salt stress corrosion cracking of Ti-8A1-lMo-lV titanium-alloy sheet duplex annealed at 550o F 56lo K and 600o F 589o K. The results showed that both a reduction in the oxygen content and pressure reduced stress corrosion cracking. Thin surface oxide films and moisture in the ranges investigated had little or no effect on the amount of stress corrosion damage. NaCl caused more damage than ASTM salt six parts NaCI to one part MgCl2, by weight. Moist chlorine produced severe stress corrosion cracking. TiCl2 appeared to be one of the main corrosion products.
- Hydrology, Limnology and Potamology
- Properties of Metals and Alloys