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i

Calculation of Ph for High-Temperature Sulfate Solutions At High Ionic Strengths.

Public Domain


Details

  • Personal Author:
  • Description:
    Corrosion studies at the U.S. Bureau of Mines on stainless steels in acid sulfate solutions prompted the development of procedures to calculate the ph for solutions at temperatures to 300 deg c. This general method for calculating the ph of high-ionic-strength aqueous solutions at elevated temperatures is an alternative to instrumental ph measurement techniques and is illustrated for the h2o-na2so4- h2so4 system. The ph is calculated from the partial dissociation of hso-4, while accounting for the buffering effects of completely dissociated na2so4 and h2so4. Modern values for the temperature- dependent second dissociation constant of h2so4 and the extended debye-huckel limiting law slopes are used in the calculations. Uncritical selection of thermodynamic data can result in differences in calculated ph that exceed 0.5 Ph unit in the temperature range 200 to 300 deg c. [Description provided by NIOSH]
  • Subjects:
  • Series:
    Mining Publications
  • Document Type:
    Text
  • Genre:
    Journal Article
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Division:
    ALRC - Albany Research Center
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Pages in Document:
    35-41
  • Volume:
    48
  • Issue:
    1
  • NIOSHTIC Number:
    nn:10011325
  • Citation:
    Corrosion 1992 Jan; 48(1):35-41
  • Federal Fiscal Year:
    1992
  • Peer Reviewed:
    False
  • Source Full Name:
    Corrosion, V. 48, No. 1, Jan. 1992, PP. 35-41
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:7dc847c09aedf140bc731323e8446b4703641ae07d6ad9e7b7238120dab30b8f7dcaa9b938d34d035f87873a0fe7fec262d5d13dcaf290925445e82b6de3b57d
  • Download URL:
  • File Type:
    Filetype[PDF - 168.02 KB ]
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