The influence of sulfide inclusions on the initiation of pits in Fe-29Ni-17Co

Cieslak, W R

Title: The influence of sulfide inclusions on the initiation of pits in Fe-29Ni-17Co

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Abstract

Kovar sheet and rod samples were tested in the as-received (R/sub B/80 and R/sub B/95, respectively) condition. Pitting tests were conducted on three sheet orientations: face, long-transverse (side), and short-transverse (end) and on two rod orientations: cross section (end) and length. Samples were prepared for testing by grinding and chemically cleaning all faces, spot-welding a Kovar wire to the back, and mounting in Maraglas resin. The exposed face was ground with 600-grit SiC paper and rinsed in deionized water immediately before testing. The grinding scratches were aligned in the rolling direction of the sheet and the drawing direction of the rod length. All tests were conducted in a room temperature 0.5 M NaCI electrolyte adjusted to pH 10 by the addition of NaOH. Polarization of Kovar in nonalkaline 0.5 M NaCI did not yield a sharp pitting potential because of the lack of a stable passive potential region. The electrolyte was purged with N/sub 2/ during testing and for a minimum of 4 h before testing. Potentiodynamic tests were conducted from the open circuit potential, following 15-min immersion, at a potential scan rate of 6 mV/min. Critical pitting potentials are reported as the average of six measurements.

Authors:: Cieslak, W R

Publication Date:: Wed Jan 01 00:00:00 EST 1986

Research Org.:: Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM 87185

OSTI Identifier:: 5898197

DOE Contract Number:: AC04-76DP00789

Resource Type:: Journal Article

Journal Name:: Corrosion (Houston); (United States)

Additional Journal Information:: Journal Volume: 42:2

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; KOVAR; PITTING CORROSION; AMBIENT TEMPERATURE; ELECTROLYTES; INCLUSIONS; MATERIALS TESTING; PH VALUE; RODS; SHEETS; SODIUM CHLORIDES; SODIUM HYDROXIDES; SULFIDES; ALKALI METAL COMPOUNDS; ALLOYS; CHALCOGENIDES; CHEMICAL REACTIONS; CHLORIDES; CHLORINE COMPOUNDS; COBALT ALLOYS; CORROSION; HALIDES; HALOGEN COMPOUNDS; HYDROGEN COMPOUNDS; HYDROXIDES; IRON ALLOYS; IRON BASE ALLOYS; MANGANESE ADDITIONS; MANGANESE ALLOYS; NICKEL ALLOYS; OXYGEN COMPOUNDS; SODIUM COMPOUNDS; SULFUR COMPOUNDS; TESTING; 360105* - Metals & Alloys- Corrosion & Erosion

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                    Cieslak, W R. The influence of sulfide inclusions on the initiation of pits in Fe-29Ni-17Co.  United States: N. p., 1986. 
        Web.

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                    Cieslak, W R. The influence of sulfide inclusions on the initiation of pits in Fe-29Ni-17Co.  United States.

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                    Cieslak, W R. 1986.  
        "The influence of sulfide inclusions on the initiation of pits in Fe-29Ni-17Co".  United States.

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@article{osti_5898197,

  title        = {The influence of sulfide inclusions on the initiation of pits in Fe-29Ni-17Co},

  author       = {Cieslak, W R},

  abstractNote = {Kovar sheet and rod samples were tested in the as-received (R/sub B/80 and R/sub B/95, respectively) condition. Pitting tests were conducted on three sheet orientations: face, long-transverse (side), and short-transverse (end) and on two rod orientations: cross section (end) and length. Samples were prepared for testing by grinding and chemically cleaning all faces, spot-welding a Kovar wire to the back, and mounting in Maraglas resin. The exposed face was ground with 600-grit SiC paper and rinsed in deionized water immediately before testing. The grinding scratches were aligned in the rolling direction of the sheet and the drawing direction of the rod length. All tests were conducted in a room temperature 0.5 M NaCI electrolyte adjusted to pH 10 by the addition of NaOH. Polarization of Kovar in nonalkaline 0.5 M NaCI did not yield a sharp pitting potential because of the lack of a stable passive potential region. The electrolyte was purged with N/sub 2/ during testing and for a minimum of 4 h before testing. Potentiodynamic tests were conducted from the open circuit potential, following 15-min immersion, at a potential scan rate of 6 mV/min. Critical pitting potentials are reported as the average of six measurements.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/5898197},
  journal      = {Corrosion (Houston); (United States)},
number       = ,

  volume       = 42:2,

  place        = {United States},

  year         = {Wed Jan 01 00:00:00 EST 1986},

  month        = {Wed Jan 01 00:00:00 EST 1986}

}

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