Localized corrosion of candidate container materials in ferric chloride solutions

Conference · Thu Oct 01 00:00:00 EDT 1998

OSTI ID:14711

Fleming, D L; Lum, B Y; Roy, A K

Localized corrosion behavior of candidate inner and outer container materials of currently-designed nuclear waste package was evaluated in aqueous solutions of various concentrations of ferric chloride (FeCl{sub 3}) at 30 C, 60 C and 90 C using the electrochemical cyclic potentiodynamic polarization (CPP) technique. Materials tested include A 5 16 carbon steel and high-performance alloys 825, G-3, G-30, C-4, 625. C-22, and Ti Gr-12. A 516 steel suffered from severe general and localized attack including pitting and crevice corrosion. High-nickel alloys 825 and G-3 also became susceptible to severe pitting and crevice corrosion. The extent of localized attack was less pronounced in alloys G-30 and C-4. Alloy 625 experienced severe surface degradation including general corrosion, crevice corrosion and intergranular attack. In contrast, only a slight crevice corrosion tendency was observed with nickel-base alloy C-22 in solutions containing higher concentrations of FeCl{sub 3} at 60 C and 90 C. Ti Gr-12 was immune to localized attack in all tested environments. The test solutions showed significant amount of precipitated particles during and after testing especially at higher temperatures.

• 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: 14711
• Report Number(s): UCRL-JC-132146; TRN: US0106222
• Resource Relation: Conference: Corrosion'99 Conference, San Antonio, TX (US), 04/25/1999--04/30/1999; Other Information: PBD: 1 Oct 1998
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
CORROSION RESISTANT ALLOYS
AQUEOUS SOLUTIONS
IRON CHLORIDES
CONTAINERS
CREVICE CORROSION
NICKEL BASE ALLOYS
POLARIZATION
RADIOACTIVE WASTE DISPOSAL
MATERIALS TESTING
INCOLOY 825
INCONEL 625
STEEL-ASTM-A516
HASTELLOYS
TITANIUM ALLOYS