GB/T 5270-2005
Metallic coatings on metallic substrates-Electrodeposited and chemically deposited coatings-Review of methods available for testing adhesion (English Version)
- Standard No.
- GB/T 5270-2005
- Language
- Chinese, Available in English version
- Release Date
- 2005
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 5270-2005
- Replace
- GB/T 5270-1985
- Scope
- This standard describes several test methods for checking the adhesion strength of electrodeposited and chemically deposited coatings. They are limited to qualitative tests. Table 2 illustrates the applicability of each test to some commonly used metallic coatings. Most of the tests will destroy the covering layer and parts, while some tests only destroy the covering layer. Even if the adhesion strength of the covering layer of the test piece is qualified in the non-destructive test, it should not be considered that the test piece is not damaged. For example, the friction polishing test (see 2.1) may render the test piece unusable, and the thermal shock test (see 2.12) may produce impermissible metallographic changes. This standard does not mention some quantitative test methods for the adhesion strength between the metal coating and the base metal developed in various periods. Because such a test requires special instruments and quite skilled techniques in practice, which makes it unsuitable for quality control tests of product parts. However, certain quantitative test methods may be useful for research and development work. When the special method of adhesion strength test is stipulated in the national standard of the specific covering layer, the method mentioned in this standard should be used first, and the prior agreement of both the supplier and the buyer should be obtained.
GB/T 5270-2005 history
- 2005 GB/T 5270-2005 Metallic coatings on metallic substrates-Electrodeposited and chemically deposited coatings-Review of methods available for testing adhesion
- 1985 GB/T 5270-1985 Metallic coatings on metallic substrates--Electrodeposited and chemically deposited coatings--Review of methods available for testing adhesion