Detecting susceptibility to intergranular corrosion of stainless steel weld heat affected zones
A Scanning Reference Electrode Technique (SRET) has been developed to study intergranular corrosion of austenitic stainless steels. The potential variations produced in the electrolyte due to the intergranular corrosion of the sensitized grain boundaries have been measured by scanning a microtip reference electrode across a weld and heat affected zones. The development of a test based on the SRET for determining the degree of sensitization of stainless steels has been explored. The technique is particularly useful in determining the degree of sensitization and the location of the sensitized grain boundaries adjacent to welds. The effect of material and welding variables on the location and degree of sensitization has been studied. The results have been compared with conventional tests for detecting susceptibility to intergranular corrosion.
- Research Organization:
- Brookhaven National Lab., Upton, N.Y. (USA)
- DOE Contract Number:
- EY-76-C-02-0016
- OSTI ID:
- 5349477
- Report Number(s):
- BNL-NUREG-22603; CONF-770524-2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
AUSTENITE
CARBON ADDITIONS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CORROSION
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
GRAIN BOUNDARIES
HEAT AFFECTED ZONE
INTERGRANULAR CORROSION
IRON ALLOYS
IRON BASE ALLOYS
JOINTS
MICROSTRUCTURE
STAINLESS STEELS
STEELS
WELDED JOINTS