GB/T 4955-1997
Metallic coatings--Measurement of coating thickness--Coulometric method by anodic dissolution (English Version)
- Standard No.
- GB/T 4955-1997
- Language
- Chinese, Available in English version
- Release Date
- 1997
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Status
- 2006-04
- Replace By
- GB/T 4955-2005
- Latest
- GB/T 4955-2005
- Scope
- This standard specifies the anodic dissolution coulometric method for measuring the thickness of single and multilayer metallic coatings. Table 1 lists typical metal cover and substrate combinations. Testing other combinations with current electrolytes (see Appendix B), or testing new electrolytes developed for other combinations, must demonstrate suitability for the overall system. This method is suitable for measuring the thickness of coatings obtained by various methods, including the measurement of multilayer systems, such as Cu/Ni/Cr (see 8.6), and the thickness of alloyed coatings and alloyed diffusion layers. This method can not only measure the coating thickness of plane samples, but also measure the coating thickness of cylindrical and wire rods.
GB/T 4955-1997 history
- 2005 GB/T 4955-2005 Metallic coatings.Measurement of coating thickness.Coulometric method by anodic dissolution
- 1997 GB/T 4955-1997 Metallic coatings--Measurement of coating thickness--Coulometric method by anodic dissolution
