Stress corrosion of high-chromium nickel-base weld metals and AISI 316 nuclear grade stainless steel in simulated boiling water reactor environments
The stress corrosion cracking (SCC) susceptibility of AlSl 316 NG (nuclear grade) stainless steel (SS), which has been welded with three high-chromium nickel-base weld metals (l-72, R-127, and R-135), was investigated by means of a series of slow strain rate tests (SSRTs) at a strain rate of 2 x 10/sup -7/ s/sup -1/. Tests were conducted in simulated boiling water reactor (BWR) environments at 288 C, which simulated either the normal BWR primary coolant chemistry or the impure (SO/sub 4//sup 2-/) chemistry that results from the intrusion of resin from the demineralizer system. The results indicated that all of the materials were immune to SCC in the normal BWR environment. In the resin intrusion environment, both the l-72 and R-135 weld metals were immune to SCC, but the R-127 material exhibited intergranular stress corrosion cracking. The AlSl 316 NG SS was susceptible to transgranular stress corrosion cracking in the resin intrusion environment, except when welded with l-72, in which case it was immune to SCC.
- Research Organization:
- Southwest Research Institute, 6220 Culebra Road, San Antonio, TX 78284
- OSTI ID:
- 6543803
- Journal Information:
- Corrosion (Houston); (United States), Vol. 42:11
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
BWR TYPE REACTORS
PRIMARY COOLANT CIRCUITS
CHROMIUM ALLOYS
STRESS CORROSION
NICKEL ALLOYS
STAINLESS STEEL-316
COOLANTS
CORROSION RESISTANCE
CRACKS
DEMINERALIZATION
HIGH TEMPERATURE
RESINS
SIMULATION
STRAIN RATE
WELDED JOINTS
WELDING
ALLOYS
CHEMICAL REACTIONS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
COOLING SYSTEMS
CORROSION
CORROSION RESISTANT ALLOYS
ENERGY SYSTEMS
FABRICATION
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
MATERIALS
MOLYBDENUM ALLOYS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTORS
SEPARATION PROCESSES
STAINLESS STEELS
STEELS
WATER COOLED REACTORS
WATER MODERATED REACTORS
210100* - Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
360105 - Metals & Alloys- Corrosion & Erosion