T/CNS 3-2018 Nuclear power plant metal material scratching re passivation test method in high temperature and high pressure water

Scope

Scope: This standard specifies the method and corresponding technical requirements for evaluating the re-passivation characteristics of metal materials used in nuclear power plants in high-temperature and high-pressure water by rapid scratch testing. This standard applies to the scratch re-passivation test of metal materials used in nuclear power plants in water media below 350 °C. Main technical content: In the process of drafting this standard, reference was made to the national standards GB/T 10123-2001 "Basic Terms and Definitions of Corrosion of Metals and Alloys", GB/T 24196-2009 "Corrosion of Metals and Alloys - Electrochemical Test 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 Potentiokinetic 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 Potentiokinetic Polarization Measurements for Localized Corrosion Susceptibility of Iron-, Nickel-, or Cobalt-Based Alloys" regarding electrochemical testing. Reference was also made to the technical documents prepared by the Institute of Metal Research, Chinese Academy of Sciences on the rapid evaluation method of electrochemical testing and stress corrosion cracking sensitivity of nuclear reactor materials in high-temperature and high-pressure water, and the implementation experience of high-temperature and high-pressure water electrochemical testing and rapid evaluation of stress corrosion cracking sensitivity from 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 particularities of high-temperature electrochemical testing and stress corrosion

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