Extensive testing has been performed at the Lawrence Livermore National Laboratory (LLNL)
to determine the corrosion characteristics of nickel (Ni)-based alloys such as Alloy 22 (N06022) and
three titanium alloys. The studies focused in three major areas: (a) Immersion tests at the long-term corrosion
test facility (LTCTF), (b) the determination of the corrosion potential (Ecorr), and (c) the measurement
of the repassivation potential. A review summary of the previously published results from
LLNL in the three mentioned areas is presented. Examination of specimens removed from the LTCTF
yielded significant information regarding the general, localized and stress corrosion cracking resistance
of Alloy 22, four other nickel-based and three titanium alloys. Results from the Ecorr studies were significant
but not conclusive. Current Ecorr results mainly opened areas for future research. Repassivation
potential studies helped understanding the role of temperature, chloride concentration and inhibitive
effect of nitrate but other areas such as fabrication effects still need to be investigated in more detail. A
list of suggested future studies in the three areas mentioned above is also offered.