Effect of soluble zinc additions on the SCC performance of nickel alloys in deaerated hydrogenated water

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Description

Stress corrosion crack growth rates (SCCGR) of alloy 600, EN82H and X-750 were measured in deaerated hydrogenated water to determine if soluble zinc mitigates SCCGR. Constant load compact tension specimen tests were conducted. Two test strategies were used to discern a possible zinc effect. The first strategy employed separate SCCGR tests in zinc and non-zinc environments and compared the resulting crack growth rates. The second strategy varied zinc levels at the midterm of single specimen SCCGR tests and characterized the resulting crack growth rate effect through an electrical potential drop in-situ crack monitor. Results from the direct comparison and midterm ... continued below

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9 p.

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Morton, D.S.; Thompson, C.D.; Gladding, D. & Schurman, M.K. August 1, 1997.

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  • Knolls Atomic Power Laboratory
    Publisher Info: Knolls Atomic Power Lab., Schenectady, NY (United States)
    Place of Publication: Schenectady, New York

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Description

Stress corrosion crack growth rates (SCCGR) of alloy 600, EN82H and X-750 were measured in deaerated hydrogenated water to determine if soluble zinc mitigates SCCGR. Constant load compact tension specimen tests were conducted. Two test strategies were used to discern a possible zinc effect. The first strategy employed separate SCCGR tests in zinc and non-zinc environments and compared the resulting crack growth rates. The second strategy varied zinc levels at the midterm of single specimen SCCGR tests and characterized the resulting crack growth rate effect through an electrical potential drop in-situ crack monitor. Results from the direct comparison and midterm changing chemistry tests did not discern a zinc influence; any apparent zinc influence is within test to test variability ({approximately}1.5{times} change in crack growth rate). AEM, AUGER and ESCA crack tip fracture surface studies identified that zinc was not incorporated within crack tip oxides. These studies identified nickel rich crack tip oxides and spinel, with incorporated zinc, ({approximately}5 atom percent) bulk surface oxides.

Physical Description

9 p.

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INIS; OSTI as DE99001882

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  • 8. international symposium on environmental degradation of materials in nuclear power systems-water reactors, Amelia Island, FL (United States), 10-14 Aug 1997

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  • Other: DE99001882
  • Report No.: KAPL-P--000145
  • Report No.: K--97008;CONF-970832--
  • Grant Number: AC12-76SN00052
  • DOI: 10.2172/319774 | External Link
  • Office of Scientific & Technical Information Report Number: 319774
  • Archival Resource Key: ark:/67531/metadc684928

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Creation Date

  • August 1, 1997

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • May 16, 2016, 6:23 p.m.

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Morton, D.S.; Thompson, C.D.; Gladding, D. & Schurman, M.K. Effect of soluble zinc additions on the SCC performance of nickel alloys in deaerated hydrogenated water, report, August 1, 1997; Schenectady, New York. (digital.library.unt.edu/ark:/67531/metadc684928/: accessed June 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.