Effects of Inclusions in HSLA Carbon Steel on Pitting Corrosion in CaCl2

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Susceptibility of high strength low alloy steel to localized corrosion was studied in 6.7 M CaCl{sub 2} for oil and natural gas drilling applications. Results of the immersion and electrochemical experiments showed that the steel is susceptible to pitting corrosion. Optical microscopy investigations of the polished samples revealed that 10% of the surface area was occupied by defects in the form of pits. The energy dispersive X-ray (EDX) and wavelength dispersive X-ray (WDX) chemical analyses revealed higher concentrations of Mn and S compared to the metal matrix in defected areas. These areas served as the sites for development of corrosion ... continued below

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Ziomek-Moroz, M.; Bullard, S.; Rozman, K. & Kruzic, J.J. December 5, 2011.

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Susceptibility of high strength low alloy steel to localized corrosion was studied in 6.7 M CaCl{sub 2} for oil and natural gas drilling applications. Results of the immersion and electrochemical experiments showed that the steel is susceptible to pitting corrosion. Optical microscopy investigations of the polished samples revealed that 10% of the surface area was occupied by defects in the form of pits. The energy dispersive X-ray (EDX) and wavelength dispersive X-ray (WDX) chemical analyses revealed higher concentrations of Mn and S compared to the metal matrix in defected areas. These areas served as the sites for development of corrosion pits during both immersion and electrochemical experiments. The fatigue results of the corroded samples indicate that if the pit was the most significant defect, the fatigue crack initiated and propagated at this site.

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11-20

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  • Journal Name: Electrochemical Transactions; Journal Volume: 35; Journal Issue: 2011

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  • Report No.: NETL-PUB-85
  • Grant Number: NONE
  • Office of Scientific & Technical Information Report Number: 1039047
  • Archival Resource Key: ark:/67531/metadc829319

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  • December 5, 2011

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  • May 19, 2016, 3:16 p.m.

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  • Aug. 8, 2016, 4:11 p.m.

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Ziomek-Moroz, M.; Bullard, S.; Rozman, K. & Kruzic, J.J. Effects of Inclusions in HSLA Carbon Steel on Pitting Corrosion in CaCl2, article, December 5, 2011; United States. (digital.library.unt.edu/ark:/67531/metadc829319/: accessed October 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.