Corrosion investigation in supercritical water oxidation process environments

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:435662

Garcia, K M; Mizia, R E ^[1]

---

1. Lockheed Idaho Technologies Co., Idaho Falls, ID (United States). Idaho National Engineering Lab.

A corrosion investigation was done at MODAR, Inc., using a supercritical water oxidation (SCWO) vessel reactor. Several types of multilayered ceramic rings and experimental nickel alloy coupons were exposed to a chlorinated cutting oil, TrimSol, in the SCWO process. A corrosion casing was designed and mounted in the vessel reactor with precautions to minimize chances of degrading the integrity of the pressure vessel. Fifteen of the ceramic coated rings were stacked vertically in the casing at one time for each test. There was a total of 36 rings. The rings were in groupings of three rings that formed five sections. Each section saw a different SCWO environment, ranging from 650 C to 300 C. The metal coupons were mounted on horizontal thread holders welded to a vertical rod attached to the casing cover in order to hand down the middle of the casing. The experimental nickel alloys performed better than the baseline nickel alloys. A titania multilayered ceramic system sprayed onto a titanium ring remained intact after 120--180 hours of exposure. This is the longest time any coating system has withstood such an environment without significant loss.

• DOE Contract Number: AC07-94ID13223
• OSTI ID: 435662
• Report Number(s): CONF-951135--; ISBN 0-7918-1751-2
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
36 MATERIALS SCIENCE
CERAMICS
CHEMICAL REACTORS
CORROSION
CORROSION PROTECTION
MATERIALS TESTING
NICKEL BASE ALLOYS
OXIDATION
PROTECTIVE COATINGS
SUPERCRITICAL GAS EXTRACTION
TITANIUM OXIDES
ZIRCONIUM OXIDES