Stress Corrosion Cracking Test for Pure Copper Tube Using C-Ring Specimen under Ammoniacal Environment

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Other Title
  • C-リング試験片を用いた純銅管のアンモニア環境中における応力腐食割れ試験
  • C-リング シケンヘン オ モチイタ ジュンドウカン ノ アンモニア カンキョウ チュウ ニ オケル オウリョク フショク ワレ シケン

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<p>A 3-week exposure test of the C-ring specimen sampled from a commercial phosphorous deoxidized copper tube in ammoniacal environment were carried out to investigate stress corrosion cracking of a pure copper tube. C-ring specimens were applied high and low stresses; a high stress was over a proof stress, whereas a low stress was within an elastic region. Stress corrosion cracking occurred in the highly stressed C-ring specimen after the 3-week exposure test in gas-phase ammonia derived from 3 and 9wt% ammonia water. On the other hand, intergranular corrosion was observed in the C-ring specimens under low stress. A diameter recovery rate of C-ring specimen for which stress corrosion cracking developed was smaller than that of C-ring specimen without stress corrosion cracking.</p>

Journal

  • Corrosion Engineering

    Corrosion Engineering 65 (12), 494-497, 2016

    Japan Society of Corrosion Engineering

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