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See Chinese contents: GB/T 38898-2020 GB/T 38898-2020: Non-destructive testing--Testing method for measuring coating bond strength using ultrasonic wave
This standard specifies the non-destructive testing method of coating bond strength based on the principle of ultrasonic wave, including terms and definitions, personnel qualifications, testing methods, ultrasonic testing equipment, testing conditions, testing requirements, compilation of testing report. This standard is applicable to coating structures composed of metal and nonmetal materials with good sound permeability, including coatings, substrates, bonding layers, including the non-destructive testing of the bond strength of wear-resistant and thermal barrier structures formed by bonding, sintering, chemical and metal bonding.
