The Influence of Dissolved Hydrogen on the Corrosion of Type 304 Stainless Steels Treated with Inhibitive Chemicals in High Temperature Pure Water

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概要

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• In order to assess the influence of dissolved hydrogen on the intergranular stress corrosion cracking (IGSCC) characteristics of Type 304 stainless steels treated with inhibitive chemicals, electrochemical corrosion potential (ECP) measurements and slow strain rate tensile (SSRT) tests were conducted in high temperature pure water. A number of thermally sensitized specimens were prepared and then pre-oxidized in a 288°C pure water environment with the presence of 300 ppb dissolved oxygen for 360 h. Most of the specimens were then separately treated with various inhibitive chemicals including powdered zirconium oxide (ZrO2), powdered titanium oxide (TiO2), and zirconyl nitrate [ZrO(NO3)2] via hydrothermal deposition at 150°C. Test environments with a dissolved oxygen concentration of 300 ppb and various dissolved hydrogen concentrations at 288°C were created. Test results showed that the ECPs of the treated specimens were lower than that of the untreated one no matter what the dissolved hydrogen concentration was. In addition, IGSCC was observed on all specimens (treated or untreated) in all tested environments. However, the untreated specimen exhibited lower elongation, shorter failure time, and more secondary cracks on the lateral surfaces. It was therefore suggested that inhibitive chemicals such as ZrO2, TiO2, and ZrO(NO3)2 did provide a certain degree of enhancement in improving the mechanical behavior of the treated specimens and in prolonging IGSCC initiation times.

• 一般社団法人 日本原子力学会の論文
• 2005-05-25

著者

• Yeh Tsung-kuang

  Nuclear Sci. And Technol. Dev. Center National Tsing-hua Univ.

• Tsai Chuen-horng

  Department Of Engineering And System Science National Tsing-hua University

• Cheng Yu-hsiang

  Department Of Engineering And System Science National Tsing-hua University

• Tsai Chuen‐horng

  Department Of Engineering And System Science National Tsing-hua University

• Yeh Tsung‐kuang

  Nuclear Science And Technology Development Center National Tsing-hua University

関連論文

• The Influence of ZrO_2 Treatment on the Electrochemical Behavior of Oxygen and Hydrogen on Type 304 Stainless Steels in High Temperature Water
• Impact of Power Uprate on the Water Chemistry in the Primary Coolant Circuit of a Boiling Water Reactor Operating under a Fixed Core Flow Rate
• Experimental Characterization of an Inductively Coupled Plasma Discharge Using a Shape-Adjustable Coil
• The Influence of Various Treating Parameters on the Corrosion of ZrO_2-Treated Type 304 Stainless Steels in High-Temperature Water
• The Influence of Dissolved Hydrogen on the Corrosion of Type 304 Stainless Steels Treated with Inhibitive Chemicals in High Temperature Pure Water
• Intergranular Stress Corrosion Cracking of Type 304 Stainless Steels Treated with Inhibitive Chemicals in Simulated Boiling Water Reactor Environments
• Intergranular Stress Corrosion Cracking of Platinum Treated Type 304 Stainless Steels in High Temperature Water
• Electrochemical Corrosion Potential Modeling in the Primary Heat Transport Circuit of the Chinshan Boiling Water Reactor under the Condition of Hydrogen Water Chemistry with Noble Metal Coating
• The Efficiency of Noble Metals in Reducing the Corrosion Potential in the Primary Coolant Circuits of Boiling Water Reactors Operating under Hydrogen Water Chemistry Operation
• Characterization of Vacancy Defect Interaction on the Electric Properties of Zigzag Single-Walled Carbon Nanotubes

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