Pretreatment applied engineering, corrosion assessment for tank materials: 1995 final report

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Description

For sludge washing to be conducted in existing Hanford carbon steel tanks, there must be an assurance that the tanks will be safe from failure by pitting, stress-corrosion cracking or other failure processes when the corrosion inhibitors present in the waste are diluted during the sludge washing operation. Testing has been conducted previously to define safe operating regimes in concentrated waste environments and moderately dilute waste environments. Due to identification of unsafe operating regimes for moderately dilute waste environments, testing was conducted in more dilute environments to adequately capture the range of possible chemistries during sludge washing operations.Additionally, a small ... continued below

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163 p.

Creation Information

Maclean, G.T., Westinghouse Hanford August 9, 1996.

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  • Westinghouse Hanford Company
    Publisher Info: Westinghouse Hanford Co., Richland, WA (United States)
    Place of Publication: Richland, Washington

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Description

For sludge washing to be conducted in existing Hanford carbon steel tanks, there must be an assurance that the tanks will be safe from failure by pitting, stress-corrosion cracking or other failure processes when the corrosion inhibitors present in the waste are diluted during the sludge washing operation. Testing has been conducted previously to define safe operating regimes in concentrated waste environments and moderately dilute waste environments. Due to identification of unsafe operating regimes for moderately dilute waste environments, testing was conducted in more dilute environments to adequately capture the range of possible chemistries during sludge washing operations.Additionally, a small scoping study was performed to identify the corrosion effects of high levels of chloride in the waste environments. Six month exposure coupon tests, slow strain rate tests, and potentiodynamic scans have been completed on a statistically designed test matrix of twenty-four tests.Stress- corrosion cracking was not found for the specimens in the static tests or the slow strain rate tests. Pitting and crevice corrosion was found for many of the solutions, but primarily in the vapor phase. Water line attack at the vapor space/solution interface was common for the range of solutions tested. Gross general attack was found for the specimens exposed to the vapor space of the high chloride solutions.

Physical Description

163 p.

Notes

OSTI as DE98058079

Source

  • Other Information: PBD: 9 Aug 1996

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  • Other: DE98058079
  • Report No.: WHC-SD-WM-TI--765
  • Grant Number: AC06-96RL13200
  • DOI: 10.2172/658961 | External Link
  • Office of Scientific & Technical Information Report Number: 658961
  • Archival Resource Key: ark:/67531/metadc712297

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • August 9, 1996

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • June 13, 2016, 8:34 p.m.

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Maclean, G.T., Westinghouse Hanford. Pretreatment applied engineering, corrosion assessment for tank materials: 1995 final report, report, August 9, 1996; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc712297/: accessed December 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.