CORROSION STUDIES FOR THE HRT CHEMICAL PROCESSING PLANT
The corrosion resistance of a number of materials considered for use in the HRT Chemical Processing Plant was determined in H/sub 2/SO/sub 4/ solutions. Ta was found to be fully resistant to boiling 4 M and l0.8 M H/sub 2/SO/sub 4/ solutions used for the dissolution of corrosion and fission products removed from the homogeneous-reactor fuel solution. Ta was immune to H/sub 2/ embrittlement in these solutions. Crystal-bar Zr and Zircaloy-2 were fully resistant to attuck by boiling 4 M H/sub 2/SO/sub 4/ solution but were attacked at rates of 5 to l0 mpy in boiling l0.8 M H/sub 2/SO/sub 4/ solution. Carpenter 20-Cb stainless steel was completely resistant to 4 M H/sub 2/SO/sub 4/ solutions at 38 deg C, the temperature in the decay storage vessels of the chemical proces sing plant, and generally was resistant to similar H/sub 2/SO/sub 4/ solutions at atmospheric boiling temperatures ~ ll0 deg C. In a few isolated cases, however, the alloy was prone to stress-corrosion cracking and to knife-line attack in several of the boiling 4 M H/sub 2/SO/sub 4/ environments. Corrosion rates of types 347 and 3l6 stainless steel in boiling 4 M H/sub 2/SO/sub 4/ solution were in excess of 75,000 mpy; however, in the presence of synthetic corrosion and fission products, corrosion attack was reduced to l0 mpy or less. A similar, but less drastic, reduction in the rate of attack on Carpenter 20-Cb stainless steel was experienced with additives present in the boiling 4 M H/sub 2/SOs/bu 4/ solution. The corrosion rate of the latter alloy in boiling and helium-aerated 4 M H/sub 2/ SO/sub 4/ solution was accelerated by Rus a fission-product element. (auth)
- Research Organization:
- Oak Ridge National Lab., Tenn.
- DOE Contract Number:
- W-7405-ENG-26
- NSA Number:
- NSA-13-017314
- OSTI ID:
- 4225266
- Report Number(s):
- ORNL-2735
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BOILING-- BRITTLENESS-- CHEMICAL REACTIONS-- CORROSION- - FISSION PRODUCTS-- FUEL SOLUTIONS-- HOMOGENEOUS REACTORS-- HRT-- HYDROGEN-- MATERIALS TESTING-- MINERAL ACIDS-- QUANTITATIVE ANALYSIS-- REACTORS-- REPROCESSING-- SOLUTIONS-- SULFURIC ACID-- TANTALUM-- WASTE PROCESSING
BOILING-- CARPENTER-- CORROSION-- CRACKS-- FISSION PRODUCTS-- HELIUM-- MATERIALS TESTING-- MIXING-- RUTHENIUM-- STAINLESS STEELS-- STRESSES-- SULFURIC ACID
BOILING-- CARPENTER-- CORROSION-- DECAY-- MATERIALS TESTING-- STAINLESS STEELS-- STORAGE-- SULFURIC ACID-- TEMPERATURE-- VESSELS
BOILING-- CHEMICAL REACTIONS-- CORROSION-- CRYSTALS-- MATERIALS TESTING-- SOLUTIONS--
REACTORS
BOILING-- CARPENTER-- CORROSION-- CRACKS-- FISSION PRODUCTS-- HELIUM-- MATERIALS TESTING-- MIXING-- RUTHENIUM-- STAINLESS STEELS-- STRESSES-- SULFURIC ACID
BOILING-- CARPENTER-- CORROSION-- DECAY-- MATERIALS TESTING-- STAINLESS STEELS-- STORAGE-- SULFURIC ACID-- TEMPERATURE-- VESSELS
BOILING-- CHEMICAL REACTIONS-- CORROSION-- CRYSTALS-- MATERIALS TESTING-- SOLUTIONS--
REACTORS