Comparison of the crevice corrosion resistance of Alloys 625 and 22 in concentrated chloride solution from 60 to 95 degrees C

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The effects of electrolyte composition and oxide film age on the crevice corrosion properties of alloys 625 and 22 were studied at temperatures ranging from 60 to 95 C in concentrated chloride electrolytes. Critical potentials were determined using conventional current density thresholds and comparisons were made between 625 and 22 on the basis of these critical potentials. Air aged 22 specimens exhibited the highest resistance to crevice corrosion at 95 C in terms of critical crevice potentials, while freshly polished 22 exhibited the lowest resistance. Studies over the entire, temperature range showed that air aged 22 is more resistant to ... continued below

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Kehler, B A; Illevbare, G O & Scully, J R December 6, 1999.

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The effects of electrolyte composition and oxide film age on the crevice corrosion properties of alloys 625 and 22 were studied at temperatures ranging from 60 to 95 C in concentrated chloride electrolytes. Critical potentials were determined using conventional current density thresholds and comparisons were made between 625 and 22 on the basis of these critical potentials. Air aged 22 specimens exhibited the highest resistance to crevice corrosion at 95 C in terms of critical crevice potentials, while freshly polished 22 exhibited the lowest resistance. Studies over the entire, temperature range showed that air aged 22 is more resistant to crevice corrosion than air aged 625 as evidenced by higher critical crevice potentials. As the temperature was lowered from 95 to 8O C, critical crevice potentials for 22 either approached or exceeded experimentally determined Cr (Mo, Ni) transpassive potentials.

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1.1 Megabytes pages

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  • Corrosion 2000, 55th Annual Conference & Exposition, Orlando, FL (US), 03/26/2000--03/31/2000; Other Information: PDFN

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  • Report No.: UCRL-JC-137200
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 756787
  • Archival Resource Key: ark:/67531/metadc712459

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  • December 6, 1999

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  • Sept. 12, 2015, 6:31 a.m.

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  • May 5, 2016, 9:08 p.m.

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Kehler, B A; Illevbare, G O & Scully, J R. Comparison of the crevice corrosion resistance of Alloys 625 and 22 in concentrated chloride solution from 60 to 95 degrees C, article, December 6, 1999; California. (digital.library.unt.edu/ark:/67531/metadc712459/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.