Microbiologically influenced corrosion of stainless steel in a nuclear waste facility
Corrosion in stainless steel cooling water piping in a nuclear waste processing facility occurred during an extended system lay-up. The failure characteristics indicated microbiologically influenced corrosion (MIC). The corrosion occurred at welds as pinhole penetrations in the surfaces, which opened into large subsurface void formations. Corrosive attack started in the heat-affected zones of the assembly welds, usually adjacent to fusion lines. Stepwise grinding, polishing, and etching in the affected areas revealed that voids generally grew in the wrought material as uniform, general corrosion. Tunneling (wormholing) erosion was also present. Selective attack occurred within the two-phase weld filler zone. The result was a void wall that was rough and porous-appearing, a consequence of preferential attack on the austenite. The three-dimensional spongy surface was studied optically and with the scanning electron microscope.
- Research Organization:
- Westinghouse Savannah River Co., Aiken, SC (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC09-89SR18035
- OSTI ID:
- 10125571
- Report Number(s):
- WSRC-MS-92-391; CONF-930318-6; ON: DE93006569
- Resource Relation:
- Conference: CORROSION `93: National Association of Corrosion Engineers (NACE) annual corrosion conference and materials performance and corrosion show,New Orleans, LA (United States),7-12 Mar 1993; Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
59 BASIC BIOLOGICAL SCIENCES
36 MATERIALS SCIENCE
STEELS
BIODEGRADATION
STRUCTURAL CHEMICAL ANALYSIS
SAVANNAH RIVER PLANT
RADIOACTIVE WASTE FACILITIES
COOLING SYSTEMS
CORROSION
RADIOACTIVE WASTE PROCESSING
WELDED JOINTS
EROSION
BACTERIA
LEAKS
PIPES
REMOTE VIEWING EQUIPMENT
METALLURGY
052001
550700
360105
360102
WASTE PROCESSING
MICROBIOLOGY
CORROSION AND EROSION
STRUCTURE AND PHASE STUDIES