Corrosion Behavior of Titanium Grade 7 in Fluoride-Containing NaCl Brines
The effects of fluoride on the corrosion behavior of Titanium Grade 7 (0.12-0.25% Pd) have been investigated. Up to 0.1 mol/L fluoride was added to the NaCl brines at 95 C, and three pH values of 4, 8, and 11 were selected for studying pH dependence of fluoride effects. It was observed that fluoride significantly altered the anodic polarization behavior, at all three pH values of 4, 8, and 11. Under acidic condition fluoride caused active corrosion. The corrosion of Titanium grade 7 was increased by three orders of magnitude when a 0.1 mol/L fluoride was added to the NaCl brines at pH 4, and the Pd ennoblement effect was not observed in acidic fluoride-containing environments. The effects of fluoride were reduced significantly when pH was increased to 8 and above.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 15014824
- Report Number(s):
- UCRL-CONF-207609; TRN: US0800873
- Resource Relation:
- Conference: Presented at: 206th Electrochemical Society Fall Meeting Symposium Proceedings, Honolulu, HI, United States, Oct 03 - Oct 08, 2004
- Country of Publication:
- United States
- Language:
- English
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