QB/T 1901.2-2006 Watch-cases and accessories good alloy covering Part 2: Determination of fineness, thickness, corrosion resistance and adhension (English Version)
This part of QB/T 1901 specifies the test methods for the purity, thickness, corrosion resistance and adhesion of the gold alloy covering layer of the watch case and its accessories, including the strap that cannot be removed from the watch case. This test only applies to effective surfaces. This part of QB/T 1901 applies to all gold alloy coatings specified in QB/T 1901.1.
QB/T 1901.2-2006 Referenced Document
GB/T 16921 Metallic coatings.Measurement of coating thickness.X-ray spectrometric methods
GB/T 4955 Metallic coatings.Measurement of coating thickness.Coulometric method by anodic dissolution
GB/T 6462 Metallic and oxide coatings-Measurement of coating thinckness-Microscopical method
QB/T 1901.1 Watch-cases and accessories good alloy covering Part 1: General requirement
QB/T 3819 Thickness testing method of the metal deposits and conversion coatings for the light indus trial products.β Ray backscattering
QB/T 1901.2-2006 history
2006QB/T 1901.2-2006 Watch-cases and accessories good alloy covering Part 2: Determination of fineness, thickness, corrosion resistance and adhension
1994QB/T 1901.2-1993 Gold alloy coatings for watch cases and accessories - Part 2: Tests for purity, thickness, corrosion resistance and bond strength