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Applying critical potential data to avoid stress corrosion cracking of metals

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Abstract

Available data are assembled on the critical potentials for various metal-environment systems below which stress corrosion cracking (SCC) does not occur. Such data can be used practically to avoid SCC by use of cathodic polarization, inhibiting ions or by employing galvanic couples. The slow drift of the corrosion potential before coincidence with the critical potential explains in part the observed induction times for SCC. The relative positions of the two potentials with respect to each other explains the susceptibility or resistance to SCC of various metals in a variety of chemical media. Several models proposed to explain the SCC mechanism are reviewed in the light of the present evidence.

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Uhlig, H.H. Applying critical potential data to avoid stress corrosion cracking of metals. J Appl Electrochem 9, 191–199 (1979). https://doi.org/10.1007/BF00616089

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Keywords

  • Physical Chemistry
  • Relative Position
  • Stress Corrosion
  • Stress Corrosion Crack
  • Corrosion Potential