T/CNS 6-2018 The method of electrochemical testing of metal materials in high-temperature and high-pressure water for nuclear power plants

Scope

Scope: This standard specifies the electrochemical testing methods for metal materials used in nuclear power plants in high-temperature and high-pressure water. This standard applies to the electrochemical testing of metal materials used in nuclear power plants in water media below 350°C. Main technical content: During the preparation of this standard, reference was made to the national standards GB/T 10123-2001 "Corrosion of Metals and Alloys - Basic Terms and Definitions" and GB/T 24196-2009 "Corrosion of Metals and Alloys - Electrochemical Testing Methods - Guidelines for Constant Potential and Dynamic Potential Polarization Measurements", as well as ASTM standards ASTM G3-14 "Standard Practice for Conventions Applicable to Electrochemical Measurements in Corrosion Testing", ASTM G5-14 "Reference Test Method for Making Potentiodynamic Anodic Polarization Measurements", ASTM G31-72 "Standard Practice for Lab Immersion Corrosion Testing of Metals", and ASTM G61-86 "Standard Test Method for Conducting Cyclic Potentiodynamic Polarization Measurements for Localized Corrosion Susceptibility of Iron-, Nickel-, or Cobalt-Based Alloys". At the same time, reference was also made to the technical documents prepared by the Institute of Metal Research, Chinese Academy of Sciences on electrochemical testing methods for nuclear reactor materials in high-temperature and high-pressure water, and combined with the implementation experience of high-temperature and high-pressure water electrochemical testing of the Institute of Metal Research, Chinese Academy of Sciences and related foreign research institutions. The specific technical content is described as follows. (1) Due to the particularity of high-temperature electrochemical testing, the working electrode samples are not encapsulated in any form. The bare metal surface directly participates in the test, and the sample size and surface roughness must be accurately controlled. (2) To ensure the validity of electrochemical testi

Development Information

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