Corrosion potential behavior in high temperature water of noble metal-doped alloys coatings deposited by underwater thermal spraying
- GE Corporate Research and Development Center, Schenectady, NY (United States)
- GE Nuclear Energy, San Jose, CA (United States)
The electrochemical corrosion potential of 304 stainless steel coated under water by hyper-velocity oxy-fuel and plasma spray techniques using noble metal doped powders was measured to evaluate the catalytic behavior in high temperature water under various water chemistry conditions. Thermal spray coatings of noble metal doped powders exhibited catalytic behavior for the recombination of oxygen and hydrogen in high temperature water which causes the corrosion potential to decrease well below a critical value of {minus}230 mV{sub she} for the intergranular stress corrosion cracking protection in water. This was observed in water containing various amounts of oxygen and hydrogen peroxide when stoichiometric excess hydrogen was present.
- OSTI ID:
- 203750
- Report Number(s):
- CONF-950816-; ISBN 1-877914-95-9; TRN: 96:009716
- Resource Relation:
- Conference: 7. international symposium on environmental degradation of materials in nuclear power plants: water reactors, Breckenridge, CO (United States), 6-10 Aug 1995; Other Information: PBD: 1995; Related Information: Is Part Of Seventh international symposium on environmental degradation of materials in nuclear power systems -- Water reactors: Proceedings and symposium discussions. Volume 2; Airey, G.; Andresen, P.; Brown, J. [eds.] [and others]; PB: 620 p.
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 NUCLEAR POWER REACTORS AND ASSOCIATED PLANTS
BWR TYPE REACTORS
WATER CHEMISTRY
STAINLESS STEEL-304
PROTECTIVE COATINGS
CORROSION PROTECTION
PERFORMANCE
TRANSITION ELEMENT ALLOYS
CATALYTIC EFFECTS
ELECTROCHEMICAL CORROSION
STRESS CORROSION
INTERGRANULAR CORROSION
CRACK PROPAGATION
EXPERIMENTAL DATA