硫酸分解ガス環境で腐食した金属材料の高温引張特性

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タイトル別名
  • High Temperature Tensile Properties of Metallic Materials Exposed to a Sulfuric Acid Decomposition Gas Environment
  • リュウサン ブンカイ ガス カンキョウ デ フショク シタ キンゾク ザイリョウ ノ コウオン ヒッパリ トクセイ

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抄録

Corrosion tests using plate and U-bend specimens of Alloy 800H, Hastelloy XR and Inconel 600 were conducted in sulfuric acid decomposition environment of thermochemical hydrogen production process. Then tensile tests using bar specimens after corrosion were carried out to evaluate the effect of the corrosion on high-temperature tensile properties. Corrosion in sulfuric acid decomposition environment proceeds through formation of surface corrosion film and grain boundary penetration consisting of internal oxidation and sulfidation. Corrosion cracking and acceleration of corrosion under stress were not observed in the corrosion tests at 850°C in this environment. The values of 0.2% proof stress after corrosion are above 80% compared with those of solution-treated alloys and values of ultimate tensile strength after corrosion are above 90%. In addition, little decrease in high-temperature ductility by corrosion is observed.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 65 (4), 262-265, 2001

    公益社団法人 日本金属学会

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