The crevice corrosion of cathodically modified titanium in chloride solutions
- Mintek, Randburg (South Africa)
The susceptibility of titanium to crevice corrosion in low-pH chloride solutions at elevated temperatures can result in major practical problems. Although Grade 7 titanium is considered the most crevice-corrosion resistant material available for these environments, the price increase of palladium has limited the utilization of this alloy. A cost-effective titanium alloy, containing 0.2% ruthenium by mass, has been developed for use in environments of increased chloride concentration and temperature. The crevice corrosion resistance of the Ti-0.2% Ru alloy has been evaluated and compared with that of ASTM commercially pure Grade 2 titanium, Grade 7 titanium (Ti-0.12 to 0.25% palladium by mass) and Grade 12 titanium (Ti-0.8% Ni-0.3% Mo). The results indicated that the cathodically modified titanium alloys, Ti-0.2% Ru and Grade 7 titanium, showed similar resistance to crevice corrosion attack in all the solutions tested, and that their behavior was significantly better than that of Grade 2 and Grade 12 titanium.
- OSTI ID:
- 128654
- Report Number(s):
- CONF-950304--
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AQUEOUS SOLUTIONS
CREVICE CORROSION
ELECTRON MICROPROBE ANALYSIS
MAGNESIUM CHLORIDES
MOLYBDENUM ADDITIONS
NICKEL ADDITIONS
PALLADIUM ADDITIONS
PH VALUE
RUTHENIUM ADDITIONS
SAMPLE PREPARATION
SCANNING ELECTRON MICROSCOPY
SODIUM CHLORIDES
SPECTROSCOPY
TEMPERATURE DEPENDENCE
TITANIUM ALLOYS