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Review of Biotreatment, Water Recovery, and Brine Reduction Systems for the Pueblo Chemical Agent Destruction Pilot Plant (2013) / Chapter Skim
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4 Materials of Construction Review
Pages 33-38

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From page 33...
... include a large number of different ing methods and filler metals for austenitic stainless steels items that are constructed from a wide spectrum of materials, (the 300-series stainless steels) are very different from those including carbon steel, high nickel alloys, fiber-reinforced used for duplex stainless steels.
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From page 34...
... Moisture separator 304 Stainless steel None Undiluted hydrolysate piping Carbon steel Exterior painta Diluted hydrolysate piping PVC Schedule 80b None Biologically treated hydrolysate piping PVC Schedule 80b None Process water piping PVC Schedule 80b None Reverse osmosis reject piping CPVC Schedule 80b None Nitrogen nutrient piping CPVC Schedule 80b None Phosphate nutrient piping CPVC Schedule 80b None Off-gas treatment system piping prior to CPVC Schedule 80 b/carbon steel None moisture separator Off-Gas Treatment System (OTS) Carbon filter (granulated activated carbon)
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From page 35...
... Even a small pinhole leak added time and expense incurred in performing corrosion in one of these heat exchangers would shut down the system. monitoring to be accounted for in the rewards system under As a minimum, the heat transfer surfaces should be inspected which the site operations contractor works.
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From page 36...
... These probes are specially Increases in the corrosion potential toward the transpassive designed corrosion coupons. The corrosion rate is calculated region are an indication of possible breakdown of the passive from the change in electrical resistance rather than from mass layer on stainless steels or nickel alloys.
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From page 37...
... FIGURE 4-2  Three-electrode polarization resistance probe (a) and schematics of installation of the probe in pipe fitting (b)
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From page 38...
... These records, provide information on the corrosion process (type of cor- along with the results of the corrosion-monitoring program, rosion, time of corrosion initiation, and, in some instances, provide information critical to decisions about equipment corrosion rate)
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Key Terms

  • corrosion rate
  • electrical resistance
  • electrochemical noise
  • corrosion monitoring
  • transfer surfaces

  • heat transfer
  • exterior painta
  • polarization resistance
  • water recovery
  • visual inspection

  • stainless steels
  • brine reduction
  • localized corrosion
  • pcapp biotreatment
  • cpvc schedule

  • vendor standard
  • stress corrosion
  • corrosion cracking
  • corrosion testing
  • crevice corrosion

  • hydrolysate piping
  • resistance probe
  • heat exchangers
  • resistance probes
  • resistance measurement

  • feed tank
  • pvc schedule
  • nickel alloys
  • monitoring corrosion
  • corrosion potential


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