T/YNANT 29-2026 Technical Specification for Corrosion-Resistant Chromium Coatings Used in High-Temperature Environments
T/YNANT 29-2026 Technical Specification for Corrosion-Resistant Chromium Coatings Used in High-Temperature Environments
Basic Information
Scope
This document specifies the classification, technical requirements, test methods, inspection rules, and marking, packaging, transportation, and storage of corrosion-resistant chromium coatings on the surface of metal substrates. This document applies to pure chromium coatings prepared on the surface of metal materials using physical vapor deposition or thermal spraying techniques, which are used to improve the substrate's resistance to high-temperature oxidation and corrosion. They are mainly used for surface protection of components that need to operate in high-temperature steam and high-temperature high-pressure water environments (such as nuclear power components, high-temperature heat exchanger components, and high-temperature aerospace components). This document specifies in detail the technical content of corrosion-resistant chromium coatings for high-temperature environments in terms of classification, technical requirements, test methods, inspection rules, marking, packaging, transportation, and storage.