Stress-Corrosion Cracking in Austenitic Stainless Steel under Constant Strain Rate and Constant Polarization

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概要

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• The mechanism of stress-corrosion cracking of an austenitic stainless steel in 42% MgCl_2 aqueous aerated and deaerated solutions was investigated under constant strain rates and constant polarization. From measurements of the stress-strain curves and the observation of corrosion behaviours at slip steps produced during stress-corrosion, it was found that the susceptibility of stress-corrosion cracking depended largely on the dissolved oxygen and the oxidizer in a crorrosive medium and on the polarization of specimens, and also that the mechanism of stress-corrosion cracking differed depending on the strain rates. The presence of surface films on the austentic stainless steel which failed in air (electropolished surface) and in a 42% MgCl_2 aqueous solutions was confirmed by a reflection electron diffraction technique, and the surface films were found to consist of varying mixtures of Fe-Cr-Ni spinel type oxides, α- or γ-FeOOH and or α-Fe_2O_3. The combined action of the repassivation of fresh slip steps produced in the alloy-corrosive system and the stress to proceed the corrosion at particular slip steps play an important role in stress-corrosion cracking.

• 東北大学の論文

著者

• Shimodaira Saburo

  The Research Institute For Iron Steel And Other Metals

• TAKANO Michinori

  The Research Institute for Iron, Steel and Other Metals

• Takano Michinori

  The Research Institute For Iron Steel And Other Metals

関連論文

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• Dezincification of Alpha Brass
• Stress-Corrosion Cracking in Austenitic Stainless Steel under Constant Strain Rate and Constant Polarization
• Surface Bond between Organic Corrosion Inhibitors and Metal Surfaces
• Stress Corrosion Cracking of Inconel 600 and Incology 800 in 50% NaOH at 140℃ under Slow Strain Rate Condition
• Study on the Corrosion Resistivity of Al-Mg Alloys by means of a Potentiostat
• On the Electrochemical Behaviors of Copper-Gold Alloys
• On the Mechanism of the Rebinder Effects in MgO Immersed in N,N-Dimethylformamide and/or Dimethylsulfoxide

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