Development of a silicate-nitrite-borate corrosion inhibitor
Technical Report
·
OSTI ID:6680737
A corrosion inhibitor consisting of 1000 mg/L nitrite (NO/sub 2//sup -/), 500 mg/L silicate (SiO/sub 2/), 300 mg/L boron as a pH buffer, 50 mg/L of a biocide, and 5 mg/L tolyltriazole in deionized water was developed for use in the machine-cooling water system of the Department of Energy's Gas Centrifuge Enrichment Plant (GCEP) at Portsmouth, Ohio. Corrosion tests in this solution using six different types of metals, including 6061 aluminum, have failed to show any corrosion at the 0.05-..mu../y (0.002-mil/y) detection limit. The use of deionized water for this inhibitor solution is strongly recommended for any system containing aluminum because the presence of 30 mg/L of chloride ions is known to cause pitting in 6061 aluminum. The purity of the corrosion inhibitor can be maintained by using a small mixed-bed demineralizer in the water system. The demineralizer originally loads up with sodium and silicate ions, which then exchange for any contaminating ions-such as calcium, magnesium, or chromate-that might enter the corrosion-inhibitor solution.
- Research Organization:
- Oak Ridge Y-12 Plant, TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6680737
- Report Number(s):
- Y-2283; ON: DE83003297
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
050502* -- Nuclear Fuels-- Uranium Enrichment-- Centrifugation-- (-1989)
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ALUMINIUM
BORON
BRONZE
CENTRIFUGATION
CENTRIFUGE ENRICHMENT PLANTS
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
COOLING SYSTEMS
COPPER
COPPER ALLOYS
COPPER BASE ALLOYS
CORROSION INHIBITORS
CORROSION PROTECTION
CORROSION RESISTANT ALLOYS
ELEMENTS
ENERGY SYSTEMS
GAS CENTRIFUGATION
INDUSTRIAL PLANTS
IRON ALLOYS
IRON BASE ALLOYS
ISOTOPE SEPARATION
ISOTOPE SEPARATION PLANTS
METALS
MUNTZ METAL
NITRITES
NITROGEN COMPOUNDS
NUCLEAR FACILITIES
OXYGEN COMPOUNDS
SEMIMETALS
SEPARATION PROCESSES
SILICATES
SILICON COMPOUNDS
STAINLESS STEELS
STEELS
TESTING
TIN ALLOYS
TRANSITION ELEMENTS
ZINC ALLOYS
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ALUMINIUM
BORON
BRONZE
CENTRIFUGATION
CENTRIFUGE ENRICHMENT PLANTS
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
COOLING SYSTEMS
COPPER
COPPER ALLOYS
COPPER BASE ALLOYS
CORROSION INHIBITORS
CORROSION PROTECTION
CORROSION RESISTANT ALLOYS
ELEMENTS
ENERGY SYSTEMS
GAS CENTRIFUGATION
INDUSTRIAL PLANTS
IRON ALLOYS
IRON BASE ALLOYS
ISOTOPE SEPARATION
ISOTOPE SEPARATION PLANTS
METALS
MUNTZ METAL
NITRITES
NITROGEN COMPOUNDS
NUCLEAR FACILITIES
OXYGEN COMPOUNDS
SEMIMETALS
SEPARATION PROCESSES
SILICATES
SILICON COMPOUNDS
STAINLESS STEELS
STEELS
TESTING
TIN ALLOYS
TRANSITION ELEMENTS
ZINC ALLOYS