Comparison of the Crevice Corrosion Resistance of Alloys 625 and C22
The effects of electrolyte composition and oxide film age on the crevice corrosion properties of alloys 625 and C22 were studied at 95 C. Critical potentials were determined using conventional current density thresholds. Crevice stabilization potentials are influenced by the bulk electrolyte composition, oxide properties, and alloy dissolution behavior. Repassivation and deactivation potentials are controlled by the chemistry of the crevice solution, mass transport considerations, and the electrochemical properties of the alloys. Critical potential data also showed the large influence of air formed oxide film age on stabilization. Air aged C22 specimens exhibited the highest resistance to crevice corrosion in terms of critical crevice potentials, while freshly polished C22 exhibited the lowest resistance.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Defense Programs (DP) (US)
- DOE Contract Number:
- W-7405-Eng-48
- OSTI ID:
- 792624
- Report Number(s):
- UCRL-JC-135852-Rev-1; TRN: US200302%%87
- Resource Relation:
- Conference: 196th Meeting of the Electrochemical Society, Honolulu, HI (US), 10/17/1999--10/22/1999; Other Information: PBD: 11 Nov 1999
- Country of Publication:
- United States
- Language:
- English
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