Effect of Cathodic Protection Potential on Corrosion Fatigue Crack Growth of a Duplex Stainless Steel in Synthetic Sea Water

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  • Misawa Toshihei
    Department of Metallurgical Engineering, Muroran Institute of Technology

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Other Title
  • 人工海水中における二相ステンレス鋼の腐食疲労き裂進展に及ぼすカソード防食電位の影響
  • 人工海水中における2相ステンレス鋼の腐食疲労き裂進展に及ぼすカソード防食電位の影響
  • ジンコウ カイスイチュウ ニ オケル 2ソウ ステンレス コウ ノ フショク

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Abstract

Corrosion fatigue crack growth rate (da/dN) of (α+γ) dual-phase stainless steel SUS 329 J1 has been measured in synthetic sea water under free corrosion and the various cathodic potentials at a frequency of 0.17Hz. The effect of cathodic potential on da/dN as a function of ΔK was discussed in the range of ΔK≥20MPa·m1/2. The da/dN under the cathodic potential of -0.40--0.80V (Ag/AgCl) became much larger than that in open circuit. Cathodically polarized potential gave rise to the large acceleration of crack growth rate due to hydrogen embrittlement.

Journal

  • CORROSION ENGINEERING

    CORROSION ENGINEERING 38 (5), 274-276, 1989

    Japan Society of Corrosion Engineering

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