Corrosion of steel tendons used in prestressed concrete pressure vessels
The corrosion behavior of a high-strength steel (Specifications for Uncoated Seven-Wire-Stress-Relieved Strand for Prestressed Concrete (ASTM A 416-74, Grade 270)), typical of those used as tensioning tendons in prestressed concrete pressure vessels was measured in several corrosive environments. The protection obtained by coating the steel with two commercial petroleum-base greases or with Portland cement grout was evaluated. The few reported incidents of prestressing steel failures in concrete pressure vessels used for containment of nuclear reactors were reviewed. The susceptibility of the steel to stress corrosion cracking and hydrogen embrittlement and its general corrosion rate were determined in several salt solutions. Wires coated with the greases and grout were soaked for long periods in the same solutions and changes in their mechanical properties were subsequently determined. All three coatings appeared to give essentially complete protection; however, flaws in the grease coatings could be detrimental, and flaws or cracks less than 1-mm-wide (0.04 in.) in the grout were without effect.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5366409
- Journal Information:
- Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States), Vol. 713
- Country of Publication:
- United States
- Language:
- English
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22 GENERAL STUDIES OF NUCLEAR REACTORS
CABLES
CORROSION
CORROSION PROTECTION
PRESSURE VESSELS
STEEL-ASTM-A416
AQUEOUS SOLUTIONS
CHEMICAL COATING
CONTAINMENT SYSTEMS
CORROSION INHIBITORS
EXPERIMENTAL DATA
FAILURES
GREASES
GROUTING
HYDROGEN EMBRITTLEMENT
MECHANICAL PROPERTIES
PH VALUE
PRESTRESSED CONCRETE
REINFORCED CONCRETE
SODIUM CHLORIDES
SODIUM NITRATES
SODIUM SULFATES
STRAIN RATE
TIME DEPENDENCE
WATER
WIRES
ALKALI METAL COMPOUNDS
ALLOYS
BUILDING MATERIALS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
CONCRETES
CONTAINERS
CONTAINMENT
DATA
DEPOSITION
DISPERSIONS
EMBRITTLEMENT
ENGINEERED SAFETY SYSTEMS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
LUBRICANTS
MATERIALS
MIXTURES
NITRATES
NITROGEN COMPOUNDS
NUMERICAL DATA
OXYGEN COMPOUNDS
REINFORCED MATERIALS
SODIUM COMPOUNDS
SOLUTIONS
STEELS
SULFATES
SULFUR COMPOUNDS
SURFACE COATING
360103* - Metals & Alloys- Mechanical Properties
220200 - Nuclear Reactor Technology- Components & Accessories